CN108680951A - A method of judging that Enriching Coalbed Methane depositional control acts on based on earthquake information - Google Patents
A method of judging that Enriching Coalbed Methane depositional control acts on based on earthquake information Download PDFInfo
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- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
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- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
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Abstract
The invention discloses the methods that the effect of Enriching Coalbed Methane depositional control is judged based on earthquake information.The method application three dimensional seismic data, Seismic Sedimentology interpretation technique is applied in coal-bearing series, predict interval of interest sedimentary micro, and utilize deposition and the relativeness between variation of lithological and air content, interval of interest air content variation tendency in area is predicted, to disclose the depositional control effect of coal bed gas.Seismic Sedimentology is introduced into coal-bearing series research by the present invention, realize the meticulous depiction to extension of sedimentary facies belts and its lithologic boundary, and analyzed and researched to the effect of the depositional control of Enriching Coalbed Methane, provide strong technical support for the exploration and development of Enriching Coalbed Methane Favorable Areas.
Description
Technical field
The invention belongs to the seismic prospectings of unconventional gas reservoir gas and development technique field, are related to a kind of based on earthquake information judgement
Enriching Coalbed Methane depositional control effect method more particularly to exploration and development during interval of interest sedimentary evolvement analysis method and
The depositional control of Enriching Coalbed Methane acts on, and reliable basis is provided for the preferred favo(u)rable target enrichment region of unconventionaloil pool exploration and development
Property data.
Background technology
Geological structure the settlement Control material aggregation in basin, the regularity of distribution and deposition characteristics, basin type and deposition are special
Sign control sedimentary system and Distribution of Sedimentary Facies, sedimentary facies belt can be used to indicate the features such as reservoir development scale transitivity, that is, construct
Control basin, basin control phase, phased reservoir.By studying sedimentary facies, environment, the rock in reservoir sedimentation period can be disclosed indirectly
The distribution of the property origin cause of formation and combinations thereof so that researcher recognizes more deep to reservoir, therefore, sedimentary facies research in oil gas and
Very important position is in cbm exploration.And the depositional environment of coal forming period affects coal seam or even coal seam and forms front and back rock
Property and its poroperm characteristics variation, be of great significance to research coal seam spread and the Controlling Sedimentary Factors of Occurrence of Coalbed Methane, because
It is necessary that this carries out research to coal forming period sedimentary facies.
Traditional SEDIMENTARY FACIES ANALYSIS mainly according to drilling core, outcrop, Skeletal and log etc. relatively
Matter information, and then the Assemblages of Microfacies of target zone is divided, the working experience of researcher accounts for critically important part in analytic process, this
Kind SEDIMENTARY FACIES ANALYSIS method speed is slow, and efficiency is low, cannot be satisfied the requirement of CBM exploration and development.And coal measure strata transverse phase transition
Soon, the prediction technique based on well data cannot solve the lithologic character in the rock stratum group sedimentary facies and favorable facies belt of high frequency sequence
The problems such as prediction.
With the appearance of seismic exploration technique, the seismic data possessed compared with high lateral resolution is combined progress with well-log information
Study on deposition method gradually forms.P.R.Vail. the seismic stratigraphy that equal (1975) propose lithology in stratigraphy and sedimentology,
The achievement in research of lithofacies applies in seismic interpretation, and carrying out stratum by the analysis of seismic facies based on reflected seismic information draws
Divide comparison, judges depositional environment, prediction lithofacies lithology.(1989) such as subsequent P.R.Vail. carry on the basis of seismic stratigraphy
The concept for having gone out sequence stratigraphy by establishing chronostratigraphic architecture, and will mutually be placed on stratum whens waiting with the research of sedimentary system
It is carried out in screen work.Seismic stratigraphy considers shape, lateral contact relation and its lithofacies environment of lithosomic body etc. emphatically
Seismic profile lineups are considered as the reflection close to ideal geologic body, less consideration distortion, and the ground of different sedimentary facies by relationship
Shake reflection feature may be identical, it is difficult to distinguish, therefore there are multi-solutions, often be only limited to the analysis in some areas.And sequence
Layer theory has been widely used since the 1980s generates, and is one kind of reservoir prediction in petroleum exploration domain
Effective means was once becoming authoritative tool, and by years development, it studies degree relative maturity, but for degree of prospecting
Higher old area, sequence stratigraphy can no longer meet the demand of surveying accuracy, the meticulous depiction of sedimentary system spatial with
And the accurate prediction of reservoir has become problem in the urgent need to address.In this background, Seismic Sedimentology is come into being.Ground
Seismic stratigraphy and sequence stratigraphy study mainly utilize longitudinal seismic profile and information, and Seismic Sedimentology is then comprehensively utilized and indulged
Sedimentological research is carried out to seismic profile and each attribute slice information of horizontal direction.
Seismic Sedimentology is one and is based on high accuracy surface modelling data, by integrated application geophysical techniques method,
Sedimentary system distribution characteristics and its emerging edge cross discipline of evolution, theoretical and related skill are studied in chronostratigraphic architecture
Art has shown unique advantage in formation lithology identification, sedimentary facies belt division and Sand-body Prediction etc., is surveyed in recent years in oil gas
Spy field is widely used, and is the Seismology and Geology solution at present using a kind of more sedimentary facies belt prediction and its Lithology Discrimination
Method is released, but in coal measures field using limited.Since coal-bearing series thin interbed phenomenon is serious, transverse phase transition is fast, and lithologic boundary is not
It is clear etc. so that there are larger uncertainty, precision is difficult to meet actual production exploitation traditional prediction means of interpretation
Demand.In order to obtain lithology, lithofacies and the sedimentary information in coal-bearing series high frequency sequence, high-precision three is effectively applied in the present invention
Seismic data and well-log information, areal geology data are tieed up, Seismic Sedimentology interpretation technique is made full use of, realizes to purpose in area
The meticulous depiction of sedimentary facies before and after the poly- coal of interval, and using deposition, lithology and air content in area change between correspondence into
Row analysis, realizes the prediction being distributed to air content in area, discloses the analysis and research of the depositional control effect of Enriching Coalbed Methane,
Prediction result is true and reliable.This method novelty is used for coal-bearing series lithology, sedimentary facies, air content prediction and Enriching Coalbed Methane
Depositional control function analysis in, there is certain primacy, be that crucial work is played to coal bed gas prediction in coal-bearing series
The effective ways that deposition considerations propose can be to judge that the Predicting Technique research in Enriching Coalbed Methane area carries using earthquake information
For supporting.
Invention content
In order to solve defect existing in the prior art, coal bed gas richness is judged based on earthquake information the present invention provides a kind of
Collect the method for depositional control effect, the method is based on high accuracy surface modelling information, Seismic Sedimentology interpretation technique is introduced
In coal measures field, coal forming period depositional environment and its facies tract distribution are portrayed in detail, Enriching Coalbed Methane depositional control is acted on
It is analysed in depth, reliable basic information is provided for coal and the preferred favo(u)rable target block of CBM exploration and development.
To realize that above-mentioned target, the present invention use following technical scheme：
A method of judging that Enriching Coalbed Methane depositional control acts on based on earthquake information.It is characterized in that, the method
On the basis of using high accuracy surface modelling data, brill well logging information and areal geology data, Seismic Sedimentology is explained into skill
Art is introduced into coal-bearing series field, using the concept with reference to isochronic plane, is chosen using frequency dividing calibration technique and is referred to Deng Shi circle
Face is established high-precision chronostratigraphic architecture using frequency dividing seismic data cube combination principles of high resolution sequence stratigraphy method, is tied
Unit is studied whens the dividing condition selection minimum etc. for closing level cycle, using drilling well layering as control, strata slicing is made, uses
The Sensitive Attributes that can preferably reflect geologic characteristics with extraction, based on sandy ground in corresponding sequence than the fitting with seismic properties
The preferred single attribute of relationship determines sensitive earthquake combinations of attributes by stepwise regression analysis showed method and carries out target component
(sandy ground ratio) is fitted, and structure interval of interest sandy ground than prediction model, close by the exchange by well point sedimentary micro and sandy ground than parameter
System assigns model with geologic sedimentation meaning, and the information realizations such as calmodulin binding domain CaM ancient geoaraply background and material resource are to sedimentary facies before and after poly- coal
Meticulous depiction with spread situation, and utilize the correlation between gassiness data analysis coal bed gas content and deposition.
A method of judging that Enriching Coalbed Methane depositional control acts on based on earthquake information.It is characterized in that, the method
Include the following steps：
(1) well-log information is pre-processed；
Since temperature, pressure etc. have an impact the performance of logger in well and human factor is drawn in well logging
The measurement error risen, it is not standard curve to make the curve measured, if being directly used in horizon calibration, well log interpretation and follow-up rock
Property inverting etc., will necessarily influence the degree of reliability of these work.Therefore, it is necessary to influence of the external factor to log data is reduced,
Carry out well-log information pretreatment.
1) it uses core data to carry out environmental correction and determines possible section of caving in wellbore in conjunction with the variation of well curve,
And log numerical value of the well section with identical lithology that do not cave in is counted, to correct the log for section of caving in；
2) frequency histogram method is used to carry out log standardization, the well logging for choosing reference standard well and its reference lamina is bent
Line is standardized for the log of remaining well section of reference pair.
(2) based on treated, well-log information establishes High-Resolution Sequence Stratigraphic Framework；
1) integrated use seismic data, outcrop, rock core, well logging and well-log information shake bridge-type analysis, identification by well
With division third-band sequence；
2) identification and division at fourth level sequence interface are carried out under the control of third-band sequence Stratigraphic framework；
3) division for carrying out level cycle to interval of interest based on High Resolution Sequence Stratigraphy, marks off mid-term and short
Phase cycle, and research area's mid-term High-Resolution Sequence Stratigraphic Framework is established, it is micro- to carry out different times deposition under Sequence Stratigraphic Formation
It mutually divides, lays the foundation for STUDY OF SEDIMENTARY ENVIRONMENT work.
(3) fine structural interpretation of interval of interest is carried out based on high-quality three dimensional seismic data；
1) well shake combined calibrating is carried out by making composite traces, determines research area's main geologic layer distribution situation；
2) even well time section carries out whole district's tracking to interval of interest first, explains according to relevant explanation principle for comparison,
Form stratum macroscopically and structural configuration understanding；
3) it is compared repeatedly by flat-section in terms of tomography, minor structure, determines that different level tomographies are hard to tell situation；
4) it combines horizontal, bedding cutting and multi-attribute analysis to complete structure interpretation, and carries out more bout jump point adjustment, tomography
Precision combination, multi-faceted, multi-angle contrast verification repeatedly ultimately form rational interval of interest coal-bearing series fine structural interpretation
Result map.
(4) research unit carries out strata slicing whens determining minimum etc.；
1) deposition interface whens frequency dividing seismic calibration determination etc.
Since coal-bearing series isochronous surface is easily influenced by a layer phenomenon is worn, Seismic Sedimentology referring to Deng Shi circle using a kind of
The concept in face carries out scaling down processing to research area's seismic data cube first, then compares original seismic profile and different frequency
Frequency division section, select occurrence and position with the stable lineups of frequency variation as etc. whens reference interface；
2) foundation of chronostratigraphic architecture
Based on High Resolution Sequence Stratigraphy, in conjunction with the earthquake frequency division section and interval of interest benchmark after scaling down processing
The identification dividing condition of face cycle, structure can reach the unified isochronous stratigraphic framework of well shake Research scale；
3) whens minimum etc. unit determination
Unit is the definition for shaking same scale when " three-phase " combines about well whens minimum etc., by the individual well reference plane after division
Cycle is thrown on seismic profile, and is compared with the reflection line-ups of interval of interest on seismic profile, is selected as small as possible
, and can be identified on lineups, tracking can be stablized in the whole district, the significantly advanced sequence cycle of reflecting interface is heavy as earthquake
The unit whens minimum etc. of product research.
(5) it is based on strata slicing technology and extracts sensitive earthquake attribute；
In general seismic properties are all the seismic reflection parameters in solid timing window, and extraction seismic properties must have centainly
Extraction when window, when window size can influence the effect of attribute, it is excessive it is too small have an adverse effect, and strata slicing is substantially
The attribute analysis technology of window when being a kind of change is difficult to determining thin layer suitable for pushing up the bottom time.It will be with lithologic character stratum meaning
Basic data body of 90 ° of phase transition data volumes as Seismic Sedimentology research, it is single whens using strata slicing technology to minimum etc.
Member is sliced, and can reflect the seismic-sensitive category of sand body, lithologic boundary and oil-gaws bearing character based on strata slicing extraction later
Property.
(6) it by seismic properties standardization, clustering methodology preferred attribute, is determined using multiple gradual regressive analysis method quick
Feel seismic properties combination, and compares prediction model by target component fitting structure interval of interest sandy ground；
1) seismic properties are standardized：Its dimension of different earthquake attribute and the order of magnitude are different, lack comparability, cannot
It directly uses, when carrying out attributive analysis, different types of attribute value is transformed under unified scale first, that is, earthquake
The standardization of attribute.Here very poor standardization is used, each observation of variable is subtracted into minimum value therein, it then divided by should
Variable observations it is very poor, each variable observations after transformation between 0-1, if a certain attribute be x (i), it is very poor
Data y (i) after standardization can be obtained with following formula operation：
The value that wherein x (i) is i-th point before a certain seismic attitude processing；Y (i) is i-th point after a certain seismic attitude processing
Value；xminFor the minimum before a certain seismic attitude processing；xmaxFor the maximum before a certain seismic attitude processing；After standardization
Seismic properties value is all located at [0,1] section, can eliminate and force down the small attribute of absolute value caused by different dimensions and the order of magnitude
And amplify the adverse effect that the big attribute of absolute value is brought.
2) seismic properties is preferred：Using cross plot and correlation analysis method, sandy ground ratio in the difference sequence of well point is established
With the fit correlation of seismic properties, obtains sandy ground and carry out Sensitive Attributes primary election than the coefficient R with each attribute.In order to most
The limitation for reducing to limits single attribute carries out the preferred of seismic properties combination with clustering methodology, and screening can either
Preferably reflection interval of interest sandy ground is than parameter attribute and mutually independent seismic properties combine；
3) property parameters verification is built with prediction model：Preferred Sensitive Attributes are combined and carry out multiple stepwise regression point
Analysis, verifies whether it is really fitted to target prediction parameter sensitivity, and to target component, analyzes regression effect,
Whether up to standard observe its parameters, in the case where meeting the requirements, structure is accordingly more pre- than the sedimentary micro of parameter based on sandy ground
Survey model.
(7) it determines that interval of interest sandy ground likens to chart-pattern according to the degree of correlation of prediction model, generates sandy ground and compare isopleth
Figure.
Judge that interval of interest sandy ground likens to chart-pattern according to the degree of correlation R of prediction model, when R is more than 0.8, illustrates well
Point prediction value is coincide relatively good with actual value, and sandy ground is calculated using fitting formula and compares plane equivalence；When R is 0.6
And when between 0.8, can utilize collocating kriging interpolation the advantages of, using the sandy ground of well point ratio as master variable, be fitted prediction
Variable of the sandy ground than parameter as constraint carries out plane into figure than parameter to interval of interest sandy ground, ultimately generates sandy ground than equivalent
Line chart.
(8) by the obtained region difference microfacies of statistics and sandy ground than transformational relation, calmodulin binding domain CaM ancient geoaraply background, object
The information such as source, it is final to obtain sedimentary micro plane characteristic figure.
Well earthquake data is mostly continuous data, and the sedimentary facies of well point is discrete data, and well shake, which combines, to be first had to
Ensure the consistency of data type.Sandy ground is more micro- than parameter and deposition inside interval of interest difference sequence in statistical research area of the present invention
Discrete well point sedimentary micro information is converted into sandy ground than continuous variable come table by the corresponding threshold value distributed area of phase
Sign assigns different geologic sedimentation meanings for the sandy ground codomain distributed area more different than isogram, calmodulin binding domain CaM ancient geoaraply background,
The information such as material resource, it is final to obtain sedimentary micro plane characteristic figure.
(9) sedimentary micro plane characteristic in the area based on acquisition, binding purpose interval air content distributed intelligence, utilizes deposition
And portion is used in combination to interval of interest air content variation tendency is predicted in area in the relativeness between variation of lithological and air content
Point well point gassiness information is tested, to disclose the depositional control effect of Enriching Coalbed Methane.
The advantages of the present invention are：
1) Seismic Sedimentology interpretation technique is innovatively introduced coal measures research field by the present invention, is realized to before and after poly- coal
The meticulous depiction of different sedimentary micros, it is proposed that a kind of research of Enriching Coalbed Methane depositional control effect is judged by earthquake information
Method.
2) present invention not only reduces the evolution Feature of coal forming period depositional environment using this method, but also to studying coal bed gas
The depositional control effect of enrichment provides relatively reliable method path, and the exploration and development for Enriching Coalbed Methane Favorable Areas provides
Strong technical support.
Description of the drawings
Attached drawing 1 is the sedimentary micro division figure under Shanxi group Sequence Stratigraphic Formation in the embodiment of the present invention.
Attached drawing 2 is that the primary layer position interface tracking in the embodiment of the present invention under Shanxi group Sequence Stratigraphic Formation explains section.
Attached drawing 3 is group chronostratigraphic architecture figure in Shanxi in the embodiment of the present invention.
Attached drawing 4 is that group 12-1 wells in Shanxi divide seismic calibration figure in the embodiment of the present invention.
Attached drawing 5 be in the embodiment of the present invention S1 sequences sandy ground than parameter and seismic properties cross analysis figure.
Attached drawing 6 be in the embodiment of the present invention S2 sequences sandy ground than parameter and seismic properties cross analysis figure.
Attached drawing 7 is that S1 sequences preferred attribute combines in the embodiment of the present invention.
Attached drawing 8 is that S2 sequences preferred attribute combines in the embodiment of the present invention.
Attached drawing 9 is that the sandy ground of S1 sequences attribute constraint in the embodiment of the present invention compares isogram.
Attached drawing 10 is that the sandy ground of S2 sequences attribute constraint in the embodiment of the present invention compares isogram.
Attached drawing 11 is S1 sequences sedimentary micro flat distribution map in the embodiment of the present invention.
Attached drawing 12 is S2 sequences sedimentary micro flat distribution map in the embodiment of the present invention.
Attached drawing 13 is coal bed gas content forecast of distribution and proof diagram in the embodiment of the present invention.
Specific implementation mode
With reference to embodiment, the invention will be further described.
Embodiment
Referring to attached drawing, the present embodiment utilizes earthquake information using Shanxi group as goal in research area using the method for the invention
Analyze and determine the effect of Enriching Coalbed Methane depositional control.Include the following steps：
(1) well-log information is pre-processed, environmental correction is carried out using core data, in conjunction with the variation of well curve,
It determines possible section of caving in wellbore, and log numerical value of the well section with identical lithology that do not cave in is counted, be used for
Correct the log for section of caving in；Log standardization, selection standard well and its reference lamina are carried out using frequency histogram method
Log be that the log of reference pair remaining well section is standardized.
(2) integrated use seismic data, outcrop, rock core, well logging and well-log information are known using well shake bridge-type analysis
Not and third-band sequence is divided, the identification and division at fourth level sequence interface are carried out under the control of third-band sequence Stratigraphic framework.Based on height
Resolution ratio sequence stratigraphy carries out interval of interest the division of level cycle, marks off mid-term and short-term cycle, and establish and grind
Study carefully area's mid-term High-Resolution Sequence Stratigraphic Framework, to carry out different times sedimentary micro division under Sequence Stratigraphic Formation, referring to Fig. 1,
Shanxi group is divided into two fourth level sequences S1 and S2, corresponds to two mid-term level cycles and several short-term cycles, and draw
Different parfacies and microfacies are separated, is laid the foundation for later stage work.
(3) well is carried out by manufacturing artificial composite traces and shakes combined calibrating, determine research area's main geologic layer distribution feelings
Condition, comparison connect well time section, it is fine to obtain rational interval of interest coal-bearing series according to relevant explanation principle and interpretation process
Structure interpretation result map, referring to Fig. 2.
(4) by dividing seismic calibration determination etc. deposition interface whens first carries out at frequency dividing research area's seismic data cube
Then reason compares the frequency division section of original seismic profile and different frequency, select occurrence and position with the same of frequency variation stabilization
Reference interface whens phase axis conduct etc..
(5) it is based on High Resolution Sequence Stratigraphy, in conjunction with the earthquake frequency division section and interval of interest after scaling down processing
The identification dividing condition of level cycle, structure can reach the unified isochronous stratigraphic framework of well shake Research scale, referring to
Fig. 3, the figure be in the present embodiment Shanxi group with subsequence set and corresponding mid-term level cycle unit it is equal whens sequence
Stratigraphic framework.
(6) the individual well level cycle after division is thrown on seismic profile, and on seismic profile interval of interest it is anti-
Ejected wave lineups are compared, and selection is as small as possible, and can be identified on lineups, can stablize tracking in the whole district, instead
Unit whens minimum etc. of the significantly advanced sequence cycle in firing area face as earthquake study on deposition；Referring to Fig. 4, which is in the present embodiment
Shanxi group 12-1 wells divide seismic calibration figure.
(7) using 90 ° of phase transition data volumes with lithologic character stratum meaning as the basic data of Seismic Sedimentology research
Body, unit is sliced whens using strata slicing technology to minimum etc., and sand body, rock can be reflected by being based on strata slicing extraction later
The seismic-sensitive attribute of property boundary and oil-gaws bearing character.
(8) different types of attribute execution standardization is handled using range method so that each variable after transformation
Observation is between 0-1.
(9) cross plot and correlation analysis method are utilized, establishes sandy ground in the difference sequence of well point than quasi- with seismic properties
Conjunction relationship obtains sandy ground than the coefficient R with each attribute, to carry out Sensitive Attributes primary election.Referring to Fig. 5, this figure is this reality
Apply in example that sandy ground is than the cross analysis figure of parameter and seismic properties in Shanxi group S1 sequences, referring to Fig. 6, this figure is in the present embodiment
Cross analysis figure of the sandy ground than parameter and seismic properties in the group S2 sequences of Shanxi.Can preferably it reflect with clustering methodology screening
Interval of interest sandy ground is than parameter attribute and mutually independent seismic properties combine.Fig. 7,8 are Shanxi group difference sequence in the present invention
Interior preferred seismic properties combined result, wherein Fig. 7 combine for S1 sequence preferred attributes, are average reflection intensity and gross energy category
Property；Fig. 8 combines for S2 sequence preferred attributes, is average reflection intensity and RMS amplitude attribute.
(10) preferred Sensitive Attributes are combined and carries out stepwise regression analysis showed, whether verify it really to target prediction
Parameter sensitivity, and target component is fitted, regression effect is analyzed, phase is built in the case where parameters are up to standard
Sedimentary micro prediction model that should be based on sandy ground than parameter.
(11) judge that interval of interest sandy ground likens to chart-pattern according to the degree of correlation R of prediction model, it, can when R is more than 0.8
Sandy ground is calculated using fitting formula and compares plane equivalence；When R is between 0.6 and 0.8, collocating kriging can be utilized
Interpolation is fitted variable of the sandy ground of prediction than parameter as constraint, to target zone using the sandy ground of well point ratio as master variable
Section sandy ground carries out plane into figure than parameter, ultimately generates sandy ground than isogram, referring to Fig. 9,10, wherein Fig. 9 is the present embodiment
The sandy ground of S1 sequence attribute constraints compares isogram；Figure 10 is that the sandy ground of the present embodiment S2 sequence attribute constraints compares isogram.
(12) sandy ground threshold value more corresponding to sedimentary micro than parameter in interval of interest difference sequence inside in statistical research area
Discrete well point sedimentary micro information is converted into sandy ground and is characterized than continuous variable by distributed area, gives sandy ground than equivalent
The different codomain distributed area of line chart assigns different geologic sedimentation meanings, the information such as calmodulin binding domain CaM ancient geoaraply background, material resource, finally
Obtain sedimentary micro plane characteristic figure.Referring to Figure 11,12, wherein Figure 11 is the present embodiment S1 sequence sedimentary micro plane distributions
Figure；Figure 12 is the present embodiment S2 sequence sedimentary micro flat distribution maps.
(13) sedimentary micro plane characteristic in the area based on acquisition, binding purpose interval air content distributed intelligence, using heavy
Product and the relativeness between variation of lithological and air content are used in combination interval of interest air content variation tendency is predicted in area
Part well point gassiness information is tested, and prediction result is obtained, to disclose the depositional control effect of Enriching Coalbed Methane.Referring to figure
13, this figure is interval of interest coal bed gas content forecast of distribution and inspection figure in the present embodiment.
(14) prediction achievement is verified, and it is six mouthfuls that gassiness data well is shared in the present embodiment, and wherein 12-3 wells are used as verification well,
It can be seen that from prediction result Figure 13 and examine the practical air content of well with predicted value correspondings well, it was demonstrated that this method was predicted
Feasibility and reliability.
(15) the depositional control function analysis of Enriching Coalbed Methane thinks No. 2 coals of interval of interest in the present embodiment by research
It is lower delta plain depositional environment before strata coal, delta plain depositional environment is evolved into after poly- coal, area is studied before poly- coal
The microfacies such as gulf between distributary channel, natural levee and shunting are developed, Upper-river channel, natural levee is evolved into after poly- coal and spreads unchecked
The microfacies such as basin.From the point of view of relationship before and after poly- coal between different sedimentary micro Distribution evolutions and air content, all it is before and after poly- coal
The region air content of the sand bodies deposit development such as river, natural levee is low, the argillaceous sediments such as gulf, flood basin, marsh microfacies between shunting
It is higher to develop region air content.Research area western part well 11-1, well 12-1 and well 13-2 tri- suck gas well and are respectively positioned on river development area,
It is 5.07m3/t~8.15m3/t that its coal-bed gas content is relatively low, and east is located at two mouthfuls of well 10-1 and well in argillaceous sediment area
Its top bottom 11-3 is shale cap rock, and sealing is good, therefore air content is higher, is 13.39m3/t~17.57m3/ t, belongs to
High-gas-contained well.And it is river microfacies to verify before well 12-3 its poly- coal, develops into flood basin microfacies after poly- coal, i.e. sand is developed in bottom
Matter deposition seal-off effect is poor, and top development argillaceous sediment seal-off effect is preferable, and the air content for integrating the well is 9.44m3/t, is belonged to
It is medium relatively low but be the low gas content well of arenaceous sediment higher than western several mouthfuls of tops bottom.All in all, before and after the research poly- coal in area
There are certain rule, the i.e. arenaceous sediments such as distributary channel, natural levee to develop regional coal-seam between sedimentary micro and coal-bed gas content
Air content is relatively low, and the argillaceous sediments such as gulf, flood basin, marsh microfacies development region air content is relatively high between shunting.Therefore
Visible deposition feature has certain control action to Enriching Coalbed Methane.
Finally it should be noted that：Obviously, the above embodiment is merely an example for clearly illustrating the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the art, it can also do on the basis of the above description
Go out other various forms of variations or variation.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn
The obvious changes or variations of stretching are still in the protection scope of this invention.
Claims (10)
1. a kind of method judging the effect of Enriching Coalbed Methane depositional control based on earthquake information, it is characterised in that：The method profit
With high accuracy surface modelling data, well logging information and areal geology data are bored, using the concept with reference to isochronic plane, utilizes frequency dividing
Calibration technique, which is chosen, refers to isochronic plane, is established using frequency dividing seismic data cube combination principles of high resolution sequence stratigraphy method
High-precision chronostratigraphic architecture is studied unit whens choosing minimum etc. in conjunction with the dividing condition of level cycle, is layered and is made with drilling well
In order to control, strata slicing is made, to extract the Sensitive Attributes that can preferably reflect geologic characteristics, is then based on respective layer
In sequence sandy ground than with the preferred single attribute of the fit correlation of seismic properties, determined sensitively by stepwise regression analysis showed method
Shake combinations of attributes simultaneously carries out target sandy ground than parameter fitting, and structure interval of interest sandy ground deposits micro- than prediction model by well point
The mutually interconversion relation with sandy ground than parameter assigns model with geologic sedimentation meaning, in conjunction with Regional Palaeogeography background and material resource etc.
Information realization to the meticulous depiction of extension of sedimentary facies belts situation before and after poly- coal, and using gassiness data analysis coal bed gas content with it is heavy
Correlation between product；It the described method comprises the following steps：
(1) well-log information is pre-processed：Environmental correction and standardization are carried out to well-log information；
(2) based on treated, well-log information establishes High-Resolution Sequence Stratigraphic Framework；
(3) fine structural interpretation of interval of interest is carried out based on high-quality three dimensional seismic data；
(4) unit whens determining the minimum etc. of the unified scale of well shake, strata slicing is made as unit of unit whens minimum etc., extracts shape
State is clear, structural integrity can clearly show sedimentation unit inner plane profile and move towards the slice information of information to corresponding interval
It is characterized；
(5) the sensitive earthquake attribute of geologic sedimentation feature can be reflected by being extracted based on strata slicing technology in seismic data cube；
(6) seismic properties of extraction are standardized, and utilize sandy ground ratio in sequence and the preferably single category of attribute correlativity
Property, it is combined by clustering methodology preferred attribute, determines that sensitive earthquake set of properties merges warp using multiple gradual regressive analysis method
Target parameter fitting is crossed, structure interval of interest sandy ground compares prediction model；
(7) it determines that interval of interest sandy ground likens to chart-pattern according to the degree of correlation of prediction model, generates sandy ground and compare isogram；
(8) by different microfacies in the sequence of well point and sandy ground than interconversion relation, calmodulin binding domain CaM geologic information finally deposited
Microfacies plane characteristic figure；
(9) sedimentary micro plane characteristic figure in the area obtained, binding purpose interval air content distributed intelligence, analysis deposition pair are utilized
The influence of air content variation predicts coal bed gas with respect to enrichment region, is used in combination verification hole to test, discloses Enriching Coalbed Methane
Depositional control effect.
2. a kind of method judging the effect of Enriching Coalbed Methane depositional control based on earthquake information according to claim 1,
It is characterized in that：What the step (1) was realized in：
1) it uses core data to carry out environmental correction and determines possible section of caving in wellbore, and right in conjunction with the variation of well curve
There is well section of not caving in the log numerical value of identical lithology to be counted, the well logging song for section of being caved in using statistical result correction
Line；
2) frequency histogram method is used to carry out log standardization, the log for choosing reference standard well and its reference lamina is
Reference is standardized the log of remaining well section.
3. a kind of method judging the effect of Enriching Coalbed Methane depositional control based on earthquake information according to claim 1,
It is characterized in that：What the step (2) was realized in：
1) integrated use seismic data, outcrop, rock core, well logging and well-log information shake bridge-type analysis by well, identify and draw
Divide third-band sequence；
2) identification and division at fourth level sequence interface are carried out under the control of third-band sequence Stratigraphic framework；
3) division for carrying out level cycle to interval of interest based on High Resolution Sequence Stratigraphy marks off mid-term and short-term rotation
It returns, and establishes research area's mid-term High-Resolution Sequence Stratigraphic Framework.
4. a kind of method judging the effect of Enriching Coalbed Methane depositional control based on earthquake information according to claim 1,
It is characterized in that：What the step (3) was realized in：
1) well shake combined calibrating is carried out by making composite traces, determines research area's main geologic layer distribution situation；
2) comparison even well time section, according to from entirety to part, first dredge after it is close, from simple to complex, from known to unknown
Canons of construction carries out whole district's tracking to interval of interest, explains, forms stratum macroscopically and structural configuration understanding；
3) it in terms of tomography, minor structure, is compared repeatedly by flat-section, determines that different level tomographies are hard to tell situation；
4) it combines horizontal, bedding cutting and multi-attribute analysis to complete structure interpretation, and carries out more bout jump point adjustment, tomography is accurate
Combination, multi-faceted, multi-angle contrast verification repeatedly, ultimately forms rational interval of interest coal-bearing series fine structural interpretation achievement
Figure.
5. a kind of method judging the effect of Enriching Coalbed Methane depositional control based on earthquake information according to claim 1,
It is characterized in that：What the step (4) was realized in：
1) deposition interface whens by dividing seismic calibration determination etc.：Scaling down processing is carried out to research area's seismic data cube, comparison is former
The frequency division section of beginning seismic profile and different frequency, select occurrence and position with the stable lineups of frequency variation as etc. whens join
Examine interface；
2) chronostratigraphic architecture is established：Based on High Resolution Sequence Stratigraphy, cutd open in conjunction with the earthquake frequency dividing after scaling down processing
The identification dividing condition in face and interval of interest level cycle, sequence whens structure can reach well shake Research scale unified equal
Layer screen work；
3) unit whens determining minimum etc.：Individual well level cycle after division is thrown on seismic profile, and on seismic profile
The reflection line-ups of interval of interest is compared, and selection can identify on lineups, can stablize tracking in the whole district, is reflected
Unit whens minimum etc. of the significantly advanced sequence cycle in interface as earthquake study on deposition.
6. a kind of method judging the effect of Enriching Coalbed Methane depositional control based on earthquake information according to claim 1,
It is characterized in that, what the step (5) was realized in：Using 90 ° of phase transition data volumes with lithologic character stratum meaning as ground
The basic data body of sedimentology research is shaken, unit is sliced whens using strata slicing technology to minimum etc., is based on stratum later
Slice extraction can reflect the seismic-sensitive attribute of sand body, lithologic boundary and oil-gaws bearing character.
7. a kind of method judging the effect of Enriching Coalbed Methane depositional control based on earthquake information according to claim 1,
It is characterized in that, what the step (6) was realized in：
1) seismic properties are standardized, different types of attribute value is transformed under unified scale；
2) preferred seismic properties：Using cross plot and correlation analysis method, sandy ground ratio and earthquake in the difference sequence of well point are established
The fit correlation of attribute obtains sandy ground than the coefficient R with each attribute, to carry out Sensitive Attributes primary election；With cluster point
Analysis method, screening can either preferably reflect interval of interest sandy ground than parameter attribute and mutually independent seismic properties combine；
3) property parameters verification is built with prediction model：Preferred Sensitive Attributes are combined and carry out stepwise regression analysis showed, are tested
It demonstrate,proves whether it is really fitted to target prediction parameter sensitivity, and to target component, regression effect is analyzed, it is observed
Whether parameters are up to standard, in the case where meeting the requirements, build the accordingly sedimentary micro prediction model based on sandy ground than parameter.
8. a kind of method judging the effect of Enriching Coalbed Methane depositional control based on earthquake information according to claim 1,
It is characterized in that, what the step (7) was realized in：According to the degree of correlation R of prediction model come judge interval of interest sandy ground liken to
Chart-pattern is calculated sandy ground using fitting formula and compares plane equivalence when R is more than 0.8；When R is between 0.6 and 0.8
When, using collocating kriging interpolation method, using the sandy ground of well point ratio as master variable, the sandy ground for being fitted prediction is used as about than parameter
The variable of beam carries out plane into figure than parameter to interval of interest sandy ground, ultimately generates sandy ground and compare isogram.
9. a kind of method judging the effect of Enriching Coalbed Methane depositional control based on earthquake information according to claim 1,
It is characterized in that, what the step (8) was realized in：In statistical research area inside interval of interest difference sequence sandy ground than parameter with
Well point sedimentary micro is converted into sandy ground and is characterized than continuous variable by the corresponding threshold value distributed area of sedimentary micro, assigns
The sandy ground codomain distributed area more different than isogram is given with different geologic sedimentation meanings, calmodulin binding domain CaM ancient geoaraply background, material resource
Etc. information, it is final to obtain sedimentary micro plane characteristic figure.
10. a kind of method judging the effect of Enriching Coalbed Methane depositional control based on earthquake information according to claim 1,
It is characterized in that, what the step (9) was realized in：Based on different sedimentary micro plane distributions before and after research area's cohesion coal and its
Evolution Feature figure, binding purpose interval air content distributed intelligence, probes into what not synsedimentary and its evolutionary process changed air content
It influences, utilizes the relationship before and after poly- coal between deposition, lithology and air content, thus it is speculated that the variation tendency of research area's air content, in turn
Disclose the depositional control effect of Enriching Coalbed Methane.
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