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Inter-salt stratum pressure prediction method and device, electronic equipment and medium

A technology of formation pressure and prediction method, applied in measuring devices, geophysical measurement, seismology, etc., to achieve accurate pressure prediction and avoid interference from human factors

Pending Publication Date: 2021-11-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some scholars try to predict pressure without undercompaction theory, since compaction is one of the important reasons for the formation of abnormal pressure, if the impact of compaction is not considered at all, most methods will have great regional limitations
Especially for continental inter-salt formations with complex pressure causes, due to the extremely severe vertical changes in lithology, salt rock formations have a good plugging effect on abnormal pressures. How to accurately predict the abnormal pressure of inter-salt formations faces more challenges. challenge

Method used

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  • Inter-salt stratum pressure prediction method and device, electronic equipment and medium
  • Inter-salt stratum pressure prediction method and device, electronic equipment and medium

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Experimental program
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Effect test

Embodiment 1

[0144] image 3 A flowchart showing the steps of a method for predicting inter-salt formation pressure according to an embodiment of the present invention.

[0145] Such as image 3 As shown, the inter-salt formation pressure prediction method includes: step 101, constructing a rock physical model of the inter-salt formation; step 102, calculating the elastic tensor of the inter-salt formation according to the rock physics model; step 103, calculating according to the elastic tensor The normal compaction longitudinal wave velocity at each depth; step 104, construct a normal compaction trend line according to the normal compaction longitudinal wave velocity at each depth, and calculate the formation pressure at the target depth.

[0146] Figure 4 A schematic diagram showing a typical formation of an inter-salt formation according to an embodiment of the present invention, consisting of two sets of salt rocks and one set of inter-salt formations, the thickness of the salt roc...

Embodiment 2

[0151] Figure 8 A block diagram of an inter-salt formation pressure prediction device according to an embodiment of the present invention is shown.

[0152] Such as Figure 8 As shown, the inter-salt formation pressure prediction device includes:

[0153] Building block 201, constructing a petrophysical model of an inter-salt formation;

[0154] The elastic tensor calculation module 202 calculates the elastic tensor of the inter-salt formation according to the rock physics model;

[0155] The longitudinal wave velocity calculation module 203 calculates the normal compaction longitudinal wave velocity at each depth according to the elastic tensor;

[0156] The formation pressure calculation module 204 constructs a normal compaction trend line according to the normal compaction P-wave velocity at each depth, and calculates the formation pressure at the target depth.

[0157] As an alternative, the petrophysical model of the intersalt formation includes: according to the VRH...

Embodiment 3

[0174] The present disclosure provides an electronic device comprising: a memory storing executable instructions; a processor running the executable instructions in the memory to implement the above method for predicting inter-salt formation pressure.

[0175] An electronic device according to an embodiment of the present disclosure includes a memory and a processor.

[0176] The memory is used to store non-transitory computer readable instructions. Specifically, the memory may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory (cache). The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, and the like.

[0177] The processor may be a central processing unit (CPU) or other form of processing unit having data processing ...

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Abstract

The invention discloses an inter-salt stratum pressure prediction method and device, electronic equipment and a medium. The method comprises the following steps: constructing a rock physical model of an inter-salt stratum; according to the rock physical model, calculating the elastic tensor of the inter-salt stratum; according to the elastic tensor, calculating the normal compaction longitudinal wave velocity of each depth; and according to the normal compaction longitudinal wave velocity of each depth, constructing a normal compaction trend line, and calculating the stratum pressure of the target depth. According to the invention, the precision of the compaction trend line is improved by constructing the inter-salt rock physical model and obtaining the elastic informationunder the normal pressure condition, and the stratum pressure prediction precision can be effectively improved by combining the Eaton stratum pressure prediction method.

Description

technical field [0001] The invention relates to the technical field of oil and gas geophysics, and more specifically, to a method, device, electronic equipment and medium for predicting inter-salt formation pressure. Background technique [0002] Formation pressure, also known as pore pressure, is an important engineering sweet spot parameter. In recent years, with the gradual deepening of domestic exploration and research on shale oil and gas reservoirs, people have a deeper understanding of the exploitation of domestic marine shale gas resources. Especially with the gradual deepening of commercial exploitation of Fuling shale gas reservoirs, it has been found that the production of shale gas reservoirs is usually positively correlated with formation pressure. Accurate formation pressure prediction results will provide important information for the determination of mud density during drilling. Appropriate mud density ratio can reduce the pollution of mud to the original fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30G01V99/00
CPCG01V1/306G01V2210/6242G01V2210/6248G01V2210/66G01V20/00
Inventor 钱恪然姜大建刘韬刘来祥刘喜武刘炯
Owner CHINA PETROLEUM & CHEM CORP
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