SU1518497A1 - Method and apparatus for depth-wise matching of geophysical parameter curves - Google Patents

Abstract

The invention relates to field geophysics and allows an increase in the accuracy of the location of depth-recorded curves recorded by different probes 1 in the same well. In the process of operation, a sequence of probes is selected according to the proximity of the configuration of recorded curves, which are divided into frames (K). Each regular K of the recorded curve is compared with a double K of the previous one. For depth matching, a shift between these Ks according to the maximum similarity criterion is determined. Each successive K of the recorded curve is compared with the new dual K, which includes half of the previous one. The device implementing the method comprises a logging probe 1, a communication line 2, a switch of 3 channels, an analog-code converter 4. To match the configuration of the recorded curve with the previously recorded by dividing them into K, the device has a single-frame storage unit 5, a buffer storage unit 6, a digital storage device 7, a two-frame storage unit 10 and a processing unit 13. The two-frame unit 10 stores information on frames 11 and 12 previous curve. The current K is entered into the buffer unit 6. The processing unit 13, fixing the amount of shift, gives a command to pull the record carrier 8 by an amount equal to the width of the doubled K minus the calculated shift. The data from the buffer unit 6 is written onto the recording medium 8, which results in depth matching with the previously recorded data. This improves the quality of the primary information intended for processing on a computer. 2 sec. f-ly, 2 ill.

Description

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The next K of the recorded curve is compared to the double K of the previous one. For matching in depth, a shift between these Ks is determined by the maximum similarity criterion. Each subsequent K of the recorded curve is compared with the new dual K, which includes half of the previous one. The device implementing the method contains a logging probe I, link 2, a switch of 3 channels, Converter 4 analog - code. For comparison, according to the configuration of the recorded curve with the previously recorded one by splitting them into K, the device has a single-frame storage unit 5, a buffer storage unit 6, a digital

drive 7, a two-frame storage unit 10 and a processor unit 3. In a two-frame unit 0, information on frames 1 and 12 of the previous “Current K” curve is stored in buffer unit 6 o Processor unit 13, fixing the amount of shift, gives a command for carrying the .8 entries equal to the width of the doubled K minus the calculated shift. The data from the buffer block 6 is written on the record carrier 8, which allows depth matching with previously recorded data. This improves the quality of the primary information intended for processing on a computer 2 sec.

The invention relates to field geophysics and can be effectively used in complex geophysical surveys of well cuts

The aim of the invention is to improve the accuracy of binding the recorded curves in depth

The figo shows the reference curve of the previous parameter, which is recorded on the chart (magnetic) tape of the recorded parameter curve, the measurement of which is carried out | current frame comparing information on the recorded and reference curves | and - the magnitude of the shift5 i frame number (binary lines indicate data transmissions, single - control signals,); FIG. 2 is a diagram of a device for sensitizing a method of

The device for matching the depth of the geophysical parameters includes a logging probe 1 connected via a communication line 2 to a 3 channel switch, the output of which is connected to an analog converter 4 — a code, a single frame storage unit 5 of recorded data, a buffer storage unit 6, a digital drive 7, containing a recording medium 8 and a tape mechanism 9, a two-frame storage unit 10 of data on a magnetic tape, containing personnel registers 11 and 12, and a processing unit 13. The input of a single-frame storage unit 5 connected to the output of the converter 4 ana

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The log code 5 and the information and control outputs are respectively connected to the input of the buffer storage unit 6 and the control input of the processor unit 13, the first control output of which is connected to the control input of the buffer storage unit 6, and the information inputs and the second control output are connected respectively With the information outputs and the control input of the two-frame storage unit Yu, whose input is connected to the output of the digital storage unit 7, the first and second control inputs of which are (forward and reverse) prot buckle arrangement) connected respectively to third and fourth outputs by the control processor unit 13 on

 The method is implemented as follows

 It is known that in conducting geophysical studies in wells, a number of parameters characterizing the formations have to be measured, and these studies are carried out at different stages of well construction and mostly not in a complex. Therefore, the problem of interdependent measurement of these measurements arises. in depth. Due to the unequal deformation of the logging cable, even for the same depths, the depth marks on the diagrams of different measurements are different. Therefore, direct linking them to the depth marks is impossible. The situation is much more complicated with machines51

processing of logging material, since the permissible discrepancy in depths here should not exceed the quantization step. The accuracy of matching the depths, regulated by the technical instruction, has been achieved in the order of one meter per thousand meters of logging interval. Therefore, editing diagrams by a geophysicist before entering them into a computer has become an indispensable stage of machining, significantly reducing its efficiency.

The method allows the depth matching of the curves directly in the process of recording them on the rig and ensures this by sequentially adding them to the previously recorded curves of the newly recorded ones. Let a logging curve recorded on the previous recording (magnetic tape) recorded at the previous trip (reference curve). It is required to record a new curve at a given descent-climb, having fit into the format of a previously recorded curve with their matching in depth.

Dp of this is chosen such a sequence of probes, so that the configuration of the recorded curves in pairs were close, for example, a small probe, a small probe, a medium probe, a large probe, PS, GC, NGK and TOD. a fixed depth interval - a frame. A double frame is selected on the previously recorded curve to create a search step. As shown in FIG. 1, the current frame to be recorded is denoted by the letter 1. When this frame is received, it is mapped to the corresponding i-th double frame on the reference curve by configuration. As a similarity criterion, the maximum of the correlation function can be chosen. According to the maximum of the similarity criterion, the position of this i-ro frame relative to the double frame is determined, and it is inscribed with offset and onto the recording medium. Then, similarly, operations with frames i + 1, 1 + 2 are performed. And t, d "from the bottom to the top of the borehole.

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values according to the glouia .. e curves Next, be discharged i / i ----; , h, ctver and other curves in a similar manner.

The device functions in the following way.

The data on line 2 cpt-- z through the switch 3 channels post / - transmits to the converter 4 an analog code, from where they are fed into a single frame fill to the di block 5, when filling the block, all its contents are completely transferred to the buffer memory unit 6, from where displayed on

15 digital storage device 7. Thus, recording is made on the recording medium 8 (magnetic tape) of the first logging curve. When another logging probe is again lowered into the same well

20 NU it is necessary to combine in depth the previously recorded curve and the newly recorded one. This is accomplished using a two-frame storage unit 10 and a processor

25 of block 13o When operating in this mode, the signal from the second control output (transmission) of the processor unit 13 from the recording medium 8 is recorded in block 10 and the first double frame of the recording frame is recorded. Simultaneously, the single-frame storage unit 5 is filled ;. When it is transferred, the information is transferred to the buffer unit 6, and the control signal (search)

enters the control input of the processor unit 13, Zaf-zsirovannye in the storage units 10 and 6 of the data requested by the processor unit 13, which essentially compares the information in these frames by. the chosen similarity criterion, for example, the maximum of the correlation function {and, and determines the relative shift of the single frame information in the storage unit 6 relative to the information in the double frame of the postage block 10, Since both these and other data objectively reflect the same cut, juxtaposition

always taking place. Having fixed the shift value, the processor unit 13 gives a command to reverse the recording medium 8 by an amount equal to the width of the double frame minus the calculated shift (this value is expressed in the number of discrete steps in the depth). After that, at the command from the first control output, the recording of the processor unit 13 data from

The storage unit 6 fits into the 1 | axis 8 of the record, being matched in depth with the previously recorded; ann1.1o During these operations, the next frame is executed in the storage unit 5 and the next information is sent to the buffer storage unit 6 . The signal from the second control output (transfer) of the processor unit 13 forms a new double frame by transferring data from the personnel register 11 to the personnel register 12 and filling the personnel register II with data from the recording media 8. Then the process of matching and fitting the data is performed in the preceding sequence.

The selection of a sequence of measurements in the well, selection on the frame curves and matching them according to similar criteria improves the accuracy of matching logging data by depth, which results in a better quality of interpretation of the primary material during information processing on a computer.

Claims (1)

Invention Formula 1, The method of matching the depth of the geophysical parameters by curves, including recording in the same well a number of curves with different probes and comparing each subsequent recorded curve with the previous one by configuration, broken down into frames, about and with, in order to improve the accuracy of the recording of recorded Korins in the depth, they record the curves in the order of their mutual correlation with each other, with each successive frame of the recorded curve corresponding to ABOUT Q five supplied with a double frame of the previous one, determined for matching; 7, Depth, the shift between these frames is according to the maximum of the similarity criterion, with the subsequent lean frame of the recorded curve being compared with the new double frame, comprising half of the previous 2o A device for depth matching of geophysical ndparameters, including a logging probe, connected via a communication line to a channel switch, the output of which is connected to an analog converter — a code, a digital storage device containing a tape mechanism and a recording medium, a buffer storage unit, an output which is connected to the processor unit and the input of the digital storage device, characterized in that it is equipped with a single-frame storage unit of the recorded data and a two-frame storage unit of data on the magnetic oh tape, the one-frame storage unit input is connected to the analog converter code — the code, the information and control outputs are respectively connected to the input of the buffer memory of the block and the control-. The processor control input, the first control output of which is connected to the control input of the buffer storage unit, the information inputs and the second control output are connected respectively to the information output and control input of the two-frame storage unit, the input of which is connected to the output of the digital storage device, the first and the second control unit whose inputs are connected respectively to the third and fourth control to the zimi outputs of the processor unit. Recorded curve Teiyofuu frame Support curve hJ / Wv ll / w / hl / h