CN107728227B - Method for rapidly distinguishing sand bodies of underground river in well pattern mature area - Google Patents
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- 239000004576 sand Substances 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000002356 single layer Substances 0.000 claims abstract description 90
- 238000011160 research Methods 0.000 claims abstract description 14
- 230000035800 maturation Effects 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- IYLGZMTXKJYONK-ACLXAEORSA-N (12s,15r)-15-hydroxy-11,16-dioxo-15,20-dihydrosenecionan-12-yl acetate Chemical compound O1C(=O)[C@](CC)(O)C[C@@H](C)[C@](C)(OC(C)=O)C(=O)OCC2=CCN3[C@H]2[C@H]1CC3 IYLGZMTXKJYONK-ACLXAEORSA-N 0.000 claims description 6
- IYLGZMTXKJYONK-UHFFFAOYSA-N ruwenine Natural products O1C(=O)C(CC)(O)CC(C)C(C)(OC(C)=O)C(=O)OCC2=CCN3C2C1CC3 IYLGZMTXKJYONK-UHFFFAOYSA-N 0.000 claims description 6
- 238000004062 sedimentation Methods 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 230000008021 deposition Effects 0.000 abstract description 3
- 239000011435 rock Substances 0.000 abstract 1
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- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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- G01V9/007—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00 by detecting gases or particles representative of underground layers at or near the surface
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Abstract
The invention relates to a method for quickly distinguishing sand bodies of an underground river in a well pattern mature area, which comprises the steps of 1), stratigraphic division and comparison, and establishment of an isochronous stratigraphic comparison framework; step 2), drawing a contour map of the thickness of each single-layer sand body; step 3), under the constraint of an isochronal stratigraphic contrast framework, carrying out deposition microphase interpretation according to the well logging curve form and rock debris data; step 4), establishing a deposition microphase database by taking the single layer as a basic unit; step 5), carrying out river sand body identification well by taking any single layer as a research object; step 6), after all wells of the corresponding single layer participate in comparison, carrying out river channel sand body identification of the next single layer until all single layers complete river channel sand body identification; and 7), projecting the recognition results of all wells of any single layer onto the sand body thickness contour map of the single layer according to the well position coordinates, and performing plane combination on the recognized sand body of the underground river channel by taking the sand body thickness contour map as a constraint.
Description
Technical field
The present invention relates to oil gas field reservoir geology research field, specially a kind of well pattern maturation zone quick discrimination buried channel
Sand body method.
Background technique
Oil-gas field development later period, well pattern comparative maturity are based on the raising recovery ratio skill of remaining oil (gas) Study on regularity
Art is the most critical challenge that oil-gas geology scholar faces, and the basis of remaining oil (gas) Study on regularity is known with buried channel
It Wei not core accurate reservoir description.
Oil-gas field development later period, the utilizable abundant information of accurate reservoir description, including drilling well, well logging, well logging, earthquake
Deng describing precision in well pattern thickening block can achieve single sand body rank, and description achievement abundant is that remaining oil (gas) distribution is pre-
It surveys and solid foundation has been established in the recovery ratio measure adjustment of raising.
It is cutd open it is noted, however, that traditional accurate reservoir description work sutdy process must first establish research work area
Surface grids are carried out sedimentary micro and are explained, then carry out one by one to each single layer of each section on the basis of single layer is divided with comparing
River identification carries out plane control with sand thickness isogram, and the two combines prediction river spatial distribution.Although the process can
To carry out by computer related software, however still there are some inefficiency, be mainly manifested in:
(1) section grid is established
The foundation of section grid varies with each individual, and the section grid that different geological research personnel establish may be different,
This can generate certain influence to result of study.
(2) river identifies
The identification of river channel sand must be identified first in section, and identification process is complicated, and being mainly reflected in 1. must be by
Layer carries out, and one single layer of every completion just can be carried out next single layer, and have to carry out top drawing to single layer in identification process
It is flat；2. being carried out in river identification process for each single layer, it is necessary to be carried out to all sections established in the single layer
Identification, process are very complicated；3. river identification usually requires completely to identify all rivers, including river main body, river
Then road edge carries out plane restriction further according to sand thickness isogram, predict river spatial distribution, it means that cuing open
Two face, plane angles require to carry out river prediction, it is clear that this generates a certain amount of repetitive operations.
(3) survey region well number
For general oil gas field in development late stage, well number is numerous, and some up to up to ten thousand mouthfuls of wells, this has been further exacerbated by research work
The triviality of work, working efficiency are low.Therefore, with needing to develop a kind of fast and efficiently oil-gas field development later period quick discrimination
Lower river channel sand method.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of well pattern maturation zone quick discrimination buried channel sand body
Method, work efficiency is high, judges that speed is fast, easy to operate, accuracy of judgement.
The present invention is to be achieved through the following technical solutions:
A kind of well pattern maturation zone quick discrimination buried channel sand body method, includes the following steps；
Step 1), stratigraphic partition and correlation, to the research all well STRATIGRAPHIC DIVISIONs in area to single layer rank, stratum pair whens establishing etc.
Compare screen work；
Step 2) draws the sand thickness isogram of each single layer；
It is micro- to carry out deposition according to form of logs and landwaste data under the constraint of isochronal formation cor-relation screen work for step 3)
It mutually explains, identifies river microfacies, flood plain microfacies and excessive bank sedimentary micro three types；
Step 4) establishes sedimentary micro database using single layer as basic unit；One single layer data of every mouth well includes
The top depth and bottom depth of single layer title, well-name, all Microfacies Types and each microfacies；
Step 5) carries out river channel sand identification by well using any one single layer as research object；Its judgement to every mouth well
Standard is as follows,
If only identifying river microfacies, judge that the well is in inside buried channel sand body；
If only identifying excessive bank microfacies, judge that the well is in outside buried channel sand body；
If identifying two kinds of microfacies of river microfacies and flood plain microfacies, river microfacies top depth is equal to flood plain
Microfacies bottom depth judges that the well is in inside buried channel sand body；
If identifying two kinds of microfacies of river microfacies and excessive bank microfacies, bank microfacies top depth of overflowing is equal to river microfacies bottom
Depth judges that the well is in buried channel sand body edge；
If identifying two kinds of microfacies of flood plain microfacies and excessive bank microfacies, bank microfacies top depth of overflowing is equal to flood plain
Microfacies bottom depth judges that the well is in outside buried channel sand body；
If identifying three kinds of river microfacies, flood plain microfacies and excessive bank microfacies microfacies, bank microfacies top depth of overflowing etc.
In river microfacies bottom depth, river microfacies top depth is equal to flood plain microfacies bottom depth, judges that the well is in underground
River channel sand edge；
Step 6) then carries out the channel sand of next single layer after the well all as the corresponding single layer of research is involved in comparison
Body identification, until all single layers are fully completed river channel sand identification；
Step 7), by the recognition result of all wells of any one single layer according to the sand thickness of well location coordinate projection to the single layer
Isogram gets on, and is constraint with sand thickness isogram, carries out plane combination to the buried channel sand body identified, completes
The quick judgement of well pattern maturation zone buried channel sand body.
Preferably, single layer is the vertical stratigraphic unit being made of single sedimentation unit in step 1)；By the identical of different wells
Sedimentation unit in time, which links up, establishes isochronal formation cor-relation screen work.
Preferably, when drawing the sand thickness isogram of each single layer in step 2), sand thickness data source is in survey
The explanation results of well data.
Preferably, when establishing sedimentary micro database in step 4)；
Sedimentary micro is numbered first, microfacies number in river is I, and flood plain microfacies number is II, bank microfacies of overflowing
Number is III；
Secondly as unit of single layer, data loading is carried out to the sedimentary micro that all wells identify.
Preferably, when carrying out plane combination in step 7), the well in single layer is made the following judgment；
If the position of well belongs to inside river channel sand, the area that thickness is big in sand thickness isogram is necessarily fallen in
Domain, the big region of thickness refer to that sand thickness is greater than 75% of maximum gauge in the single layer isogram, are less than or equal to the single layer
Maximum gauge in isogram；
If the position of well belongs to river channel sand edge, thickness large area in sand thickness isogram is necessarily fallen in
The left side or the right；Thickness large area refers to that sand thickness is greater than 25% of maximum gauge in the single layer isogram, is less than
Equal to 75% of maximum gauge in the single layer isogram；
If the position of well belongs to river channel sand edge, the area that thickness is minimum in sand thickness isogram is necessarily fallen in
Domain；The minimum region of thickness refers to that sand thickness is more than or equal to 0% of maximum gauge in the single layer isogram, and being less than or equal to should
The 25% of maximum gauge in single layer isogram.
Further, if the position of well belongs to river channel sand edge, if its position in depth isoline graph falls in thickness
The left side of large area then belongs to the left margin of river channel sand.If it is larger that its position in depth isoline graph falls in thickness
The right in region then belongs to the right margin of river channel sand.
Compared with prior art, the invention has the following beneficial technical effects:
When present invention progress river channel sand position judges, section grid is needed not rely on, relying solely on individual well can be completed；
Using the single well in single layer as research object, analyzed only by the sedimentary micro stacked relation to single well, Bian Kesuo
The river channel sand at place is quickly judged, does not need to carry out pushing up to single layer to even up processing；Recognition sequence can be flexibly carried out simultaneously
Adjustment, after both can carrying out all single layer identifications to a well, then identifies next well, can also own in some single layer
After well is identified, then next single layer is identified, without as conventional method, it is necessary to first will be to some single layer
After interior all wells are identified, it just can be carried out next single layer and identified；In the oil-gas field development later period, well number is numerous, traditional river
Road identifies intricate operation, inefficiency, and the method for the present invention can efficiently identify buried channel sand body, while easy to operate.
Detailed description of the invention
Fig. 1 is a kind of well pattern maturation zone quick discrimination buried channel of the invention sand body method flow diagram.
Fig. 2 is the schematic diagram for carrying out river channel sand identification described in present example using the sedimentary micro of well A.
Fig. 3 is the schematic diagram for carrying out river channel sand identification described in present example using the sedimentary micro of well B and well B'.
Fig. 4 is the schematic diagram for carrying out river channel sand identification described in present example using the sedimentary micro of well C.
Fig. 5 is the schematic diagram for carrying out river channel sand identification described in present example using the sedimentary micro of well D and well D'.
Fig. 6 is the schematic diagram for carrying out river channel sand identification described in present example using the sedimentary micro of well E.
Fig. 7 is the schematic diagram for carrying out river channel sand identification described in present example using the sedimentary micro of well F.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
A kind of well pattern maturation zone quick discrimination buried channel of the invention sand body method, is used for oil-gas field development later development well
The many blocks of number, quickly judge river channel sand boundary.As shown in Figure 1, it mainly includes the following steps.
1) stratigraphic partition and correlation establishes isochronal formation cor-relation lattice to the research all well STRATIGRAPHIC DIVISIONs in area to single layer rank
Frame.
Single layer refers to the vertical stratigraphic unit being made of single sedimentation unit in step 1)；It will be in the same time of different wells
Sedimentation unit link up and establish isochronal formation cor-relation screen work.
2) the sand thickness isogram of each single layer is drawn.
Step 2) sand thickness data source is in interpretation of logging data result.
3) according to form of logs, sedimentary micro is carried out to every mouth well and is explained.
The synthesis of sedimentary micro, that is, depositional environment and deposit in step 3)；Sedimentary micro explanation refers to according to log
Form, the identification of landwaste data are under the constraint of isochronal formation cor-relation screen work, identification river, flood plain, bank sedimentary micro of overflowing.It is each
The type of microfacies may have 3 kinds of situations in some single layer of mouth well: 1. only exist a kind of microfacies；2. there are 2 kinds of microfacies；3. there are 3
Kind microfacies.
4) using single layer as basic unit, sedimentary micro database is established.
Sedimentary micro is numbered first in step 4), microfacies number in river is I, and flood plain microfacies number is II,
Bank microfacies of overflowing number is III；Secondly as unit of single layer, data loading is carried out to the sedimentary micro that all wells identify.Such as A well a
Single layer identifies I, II, III 3 kind of microfacies, then record layer name a, well-name A, microfacies I, I top depth of microfacies, microfacies respectively
I bottom depth, microfacies II, II top depth of microfacies, II bottom depth of microfacies, microfacies III, III top depth of microfacies, III bottom of microfacies
Portion's depth.
5) using a certain single layer as research object, carry out river channel sand identification by well；
Step 5) judgment criteria is: assuming that in a single layer well A；
If only identifying microfacies I, then it is assumed that the well is in inside buried channel sand body；
If only identifying microfacies III, then it is assumed that the well is in outside buried channel sand body；
If identifying I and II two kind of microfacies, I top depth of microfacies=microfacies, II bottom depth, it is believed that the well is in ground
Inside lower river channel sand；
If identifying I and III two kind of microfacies, III top depth of microfacies=microfacies, I bottom depth, then it is assumed that the well is in
Buried channel sand body edge；
If identifying II and III two kind of microfacies, III top depth of microfacies=microfacies, II bottom depth, then it is assumed that the Jing Chu
Outside buried channel sand body；
If identifying I, II and III 3 kind of microfacies, III top depth of microfacies=microfacies, I bottom depth, I top of microfacies is deeply
II bottom depth of degree=microfacies, then it is assumed that the well is in buried channel sand body edge；
Judge respectively such as going into the well after concrete application.
As shown in Fig. 2, well A, which is only only bored in single layer a, has met river microfacies I, show that the well is in inside river channel sand；
As shown in figure 3, well B and well B' is in the vertical microfacies development characteristics of single layer a: river microfacies is stacked in excessive bank microfacies
On, show that the well is in river channel sand edge；
As shown in figure 4, well C is in the vertical microfacies development characteristics of single layer a: flood plain microfacies be stacked in river microfacies it
On, show that the well is in inside river channel sand；
As shown in figure 5, well D and well D' is in the vertical microfacies development characteristics of the single layer: flood plain microfacies is stacked in river
On microfacies, while river microfacies is stacked on excessive bank microfacies, shows that the well is in river channel sand edge；
As shown in fig. 6, well E is only bored in the single layer has met excessive bank microfacies, show that the well is in outside river channel sand；
As shown in fig. 7, well F is in the vertical microfacies development characteristics of the single layer: flood plain microfacies be stacked in excessive bank microfacies it
On, show that the well is in outside river channel sand.
6) after all wells of the single layer are involved in comparison, then the river channel sand identification of next single layer is carried out, until all
Single layer all carries out river channel sand identification；
7) certain single layer recognition result is projected into the sand thickness isogram of the single layer up, with reference to sand thickness equivalence
Line chart carries out plane combination to the buried channel sand body identified.
Plane combination method refers to the assumption that in a single layer well A in step 7)；
If belonging to inside river channel sand, the region that thickness is big in sand thickness isogram is necessarily fallen in, thickness is big
Region refer to sand thickness be greater than the single layer isogram in maximum gauge 75%, be less than or equal to the single layer isogram in
Maximum gauge；
If belonging to river channel sand edge, if its position in depth isoline graph falls in the left side of thickness large area,
Then belong to the left margin of river channel sand.If its position in depth isoline graph falls in the right of thickness large area, belong to
In the right margin of river channel sand.Thickness large area refers to that sand thickness is greater than maximum gauge in the single layer isogram
25%, less than or equal to 75% of maximum gauge in the single layer isogram；
If belonging to river channel sand edge, thickness in sand thickness isogram minimum (even zero) is necessarily fallen in
Region；The minimum region of thickness refers to that sand thickness is more than or equal to 0% of maximum gauge in the single layer isogram, is less than or equal to
The 25% of maximum gauge in the single layer isogram.
Under the application of Soviet Union's Sulige gas field block (700 mouthfuls of wells), working efficiency improves method of the present invention
30%, recognition result is applied to be used as constraint condition in three-dimensional geological modeling, so that model coincidence rate improves 8%, effect is bright
It is aobvious.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (6)
1. a kind of well pattern maturation zone quick discrimination buried channel sand body method, which is characterized in that include the following steps；
Step 1), stratigraphic partition and correlation establish isochronal formation cor-relation lattice to the research all well STRATIGRAPHIC DIVISIONs in area to single layer rank
Frame；
Step 2) draws the sand thickness isogram of each single layer；
Step 3) carries out sedimentary micro solution according to form of logs and landwaste data under the constraint of isochronal formation cor-relation screen work
It releases, identifies river microfacies, flood plain microfacies and excessive bank sedimentary micro three types；
Step 4) establishes sedimentary micro database using single layer as basic unit；One single layer data of every mouth well includes single layer
The top depth and bottom depth of title, well-name, three kinds of Microfacies Types in step 3) and each microfacies；
Step 5) carries out river channel sand identification by well using any one single layer as research object；Its judgment criteria to every mouth well
It is as follows,
If only identifying river microfacies, judge that the well is in inside buried channel sand body；
If only identifying excessive bank microfacies, judge that the well is in outside buried channel sand body；
If identifying two kinds of microfacies of river microfacies and flood plain microfacies, river microfacies top depth is equal to flood plain microfacies
Bottom depth judges that the well is in inside buried channel sand body；
If identifying two kinds of microfacies of river microfacies and excessive bank microfacies, it is deep that bank microfacies top depth of overflowing is equal to river microfacies bottom
Degree, judges that the well is in buried channel sand body edge；
If identifying two kinds of microfacies of flood plain microfacies and excessive bank microfacies, bank microfacies top depth of overflowing is equal to flood plain microfacies
Bottom depth judges that the well is in outside buried channel sand body；
If identifying three kinds of river microfacies, flood plain microfacies and excessive bank microfacies microfacies, bank microfacies top depth of overflowing is equal to river
Road microfacies bottom depth, river microfacies top depth are equal to flood plain microfacies bottom depth, judge that the well is in buried channel
Sand body edge；
Step 6) after the well all as the corresponding single layer of research is involved in comparison, then know by the river channel sand for carrying out next single layer
Not, until all single layers are fully completed river channel sand identification；
Step 7), the recognition result of all wells of any one single layer is equivalent according to the sand thickness of well location coordinate projection to the single layer
Line chart gets on, and is constraint with sand thickness isogram, carries out plane combination to the buried channel sand body identified, completes well pattern
The quick judgement of maturation zone buried channel sand body.
2. a kind of well pattern maturation zone quick discrimination buried channel sand body method according to claim 1, which is characterized in that step
It is rapid 1) in single layer be the vertical stratigraphic unit being made of single sedimentation unit；Sedimentation unit in the same time of different wells is connected
Get up to establish isochronal formation cor-relation screen work.
3. a kind of well pattern maturation zone quick discrimination buried channel sand body method according to claim 1, which is characterized in that step
When rapid 2) the middle sand thickness isogram for drawing each single layer, sand thickness data source is in the explanation results of well-log information.
4. a kind of well pattern maturation zone quick discrimination buried channel sand body method according to claim 1, which is characterized in that step
It is rapid 4) in when establishing sedimentary micro database；
Sedimentary micro is numbered first, microfacies number in river is I, and flood plain microfacies number is II, bank microfacies of overflowing number
It is III；
Secondly as unit of single layer, data loading is carried out to the sedimentary micro that all wells identify.
5. a kind of well pattern maturation zone quick discrimination buried channel sand body method according to claim 1, which is characterized in that step
When rapid 7) middle progress plane combination, the well in single layer is made the following judgment；
If the position of well belongs to inside river channel sand, the region that thickness is big in sand thickness isogram is necessarily fallen in, it is thick
It spends big region and refers to that sand thickness is greater than 75% of maximum gauge in the single layer isogram, be less than or equal to the single layer isopleth
Maximum gauge in figure；
If the position of well belongs to river channel sand edge, a left side for thickness large area in sand thickness isogram is necessarily fallen in
Side or the right；Thickness large area refers to that sand thickness is greater than 25% of maximum gauge in the single layer isogram, is less than or equal to
The 75% of maximum gauge in the single layer isogram；
If the position of well belongs to river channel sand edge, the region that thickness is minimum in sand thickness isogram is necessarily fallen in；
The minimum region of thickness refers to that sand thickness is more than or equal to 0% of maximum gauge in the single layer isogram, is less than or equal to the list
The 25% of maximum gauge in layer isogram.
6. a kind of well pattern maturation zone quick discrimination buried channel sand body method according to claim 5, which is characterized in that if
The position of well belongs to river channel sand edge, if its position in depth isoline graph falls in the left side of thickness large area,
Belong to the left margin of river channel sand；If its position in depth isoline graph falls in the right of thickness large area, belong to
The right margin of river channel sand.
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| CN109441438A (en) * | 2018-10-18 | 2019-03-08 | 中国石油化工股份有限公司 | A kind of structural complex lithologic boundary characterizing method |
| CN111624677B (en) * | 2019-02-27 | 2022-07-26 | 中国石油化工股份有限公司 | Compact sandstone gas reservoir single-phase river channel sand body boundary depicting method |
| CN110376661B (en) * | 2019-07-19 | 2020-10-30 | 中国地质大学（北京） | Underground inter-well single-river sand body comparison method and device |
| CN110656934B (en) * | 2019-10-08 | 2024-04-30 | 中国石油天然气股份有限公司 | Compaction-removing stratum comparison method for tight sandstone reservoir |
| CN112684512B (en) * | 2021-01-05 | 2023-09-26 | 中国石油天然气股份有限公司 | River channel identification method |
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| CN104632200B (en) * | 2013-11-14 | 2017-06-16 | 中国石油化工股份有限公司 | Fluvial facies multilayer and thick-layer oil reservoir fine modeling method |
| CN106569287B (en) * | 2016-09-14 | 2019-02-26 | 中国石油化工股份有限公司 | A kind of fan delta front method for predicting reservoir based on composed sand body configuration mode |
| CN106837319B (en) * | 2016-12-27 | 2019-10-11 | 中国石油天然气股份有限公司 | Underground single ancient river channel identification method under dense well pattern condition |
| CN107203651A (en) * | 2016-12-30 | 2017-09-26 | 中国石油天然气股份有限公司 | Braided river tight sandstone gas reservoir configuration dissection method |
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