Method and system for predicting abnormal stratum pressure

A technology of formation pressure and prediction method, which is applied in the fields of earthwork drilling, instrumentation, electrical digital data processing, etc., and can solve problems such as inapplicability

Active Publication Date: 2018-11-23
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

This type of method is carried out on the basis that the location of the well point has been determined, and the task of the exploration stage is to de

Method used

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  • Method and system for predicting abnormal stratum pressure
  • Method and system for predicting abnormal stratum pressure
  • Method and system for predicting abnormal stratum pressure

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with accompanying drawing.

[0056] Such as figure 1 As shown, the prediction method of abnormal formation pressure, the method includes the following steps:

[0057] Step S101: sort out formation abnormal pressure data;

[0058] Step S102: analyzing the logging response characteristics of the formation abnormal pressure data;

[0059] Step S103: establishing a formation pressure calculation model based on the logging response characteristics;

[0060] Step S104: Calculate the formation pressure data by using the formation pressure calculation model.

[0061] In a specific embodiment, in step S101, the formation pressure data is sorted out according to the actual drilling data, and then the data of pressure changes affected by engineering factors in the formation pressure data are removed;

[0062] Specifically, the formation pressure data includes normal pressure and abnormal formation pressure; ...

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Abstract

The invention relates to the technical field of test methods, in particular to a method for predicting an abnormal stratum pressure. The method comprises the steps of arranging abnormal pressure dataof a stratum; analyzing logging response characteristics of the abnormal pressure data of the stratum; building a stratum pressure calculation model through the logging response characteristics; and measuring stratum pressure data by utilizing the stratum pressure calculation model. The abnormal stratum pressure data actually measured by drilling is subjected to statistics; response characteristicanalysis of each logging curve is performed; then, the logging curve with relatively good correlation with the abnormal stratum pressure data is selected to build an abnormal pressure identificationfactor model; further, a new stratum pressure calculation formula is obtained in combination with the measured stratum pressure data; and finally, parameter data bodies in the formula are obtained byutilizing geophysical inversion based on pre-stack and post-stack seismic data, and a stratum pressure data body can be obtained by substituting the parameter data bodies into the new stratum pressurecalculation formula, so that spatial distribution characteristics of the stratum pressure are obtained, and exploration and development of abnormal pressure oil and gas reservoirs are facilitated.

Description

technical field [0001] The invention relates to the technical field of testing methods, in particular to a method for predicting abnormal formation pressure. Background technique [0002] Formation pressure, that is, pore fluid pressure, is the pressure generated by the action of geological fluids such as formation water, oil, and natural gas in rock pores. Under any geological background, the normal formation pressure is equal to the hydrostatic column pressure from the surface to the target layer, which deviates from the normal pressure trend Line pressures are considered abnormal formation pressures. [0003] With the in-depth study of oil and gas exploration and development, especially the continuous deepening of research on abnormally pressured reservoirs in the south, petroleum geological exploration workers have conducted research on abnormal formation pressure and its development mechanism, and the relationship between abnormal formation pressure and oil and gas gene...

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Application Information

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IPC IPC(8): G06F17/50G06Q50/02E21B49/00
CPCG06Q50/02E21B49/00G06F30/20G06F2119/06
Inventor 孙炜张殿伟何治亮孙冬胜沃玉进李双建李天义
Owner CHINA PETROLEUM & CHEM CORP
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