Stratum pressure prediction method

A technology of formation pressure and prediction method, applied in the field of petroleum exploration, can solve the problems of not reflecting the lateral distribution characteristics of formation pressure, low accuracy of formation pressure prediction results, and less research on formation pressure prediction, so as to improve exploration efficiency and reduce The effect of drilling risk

Active Publication Date: 2018-02-23
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Although the DC index obtained by the conventional tracking-while-drilling analysis can reflect the drillability of the formation, such an analysis can only provide information on the rock properties in a local area, and cannot reflect the change in the lateral distribution characteristics of the formation pressure;
[0004] (2) Predecessors mainly used the characteristic that P-wave velocity decreases with the increase of formation pressure to carry out pressure prediction, but the change

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] Refer to the attached figure 1 Embodiments of the present invention will be described.

[0026] The invention provides a method for predicting formation pressure through pre-stack elastic parameter inversion.

[0027] Depend on figure 1 As can be seen, the present invention comprises the following steps:

[0028] 1. Establish the r...

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Abstract

The invention relates to a stratum pressure prediction method comprising the following steps: building a first function relation between the stratum pressure and a pre-stack elasticity parameter; using an inversion method to obtain the pre-stack elasticity parameter value; obtaining the stratum pressure data according to the pre-stack elasticity parameter value solved by the inversion and the first function relation.

Description

technical field [0001] The invention belongs to the field of petroleum exploration and relates to a formation pressure prediction method. Background technique [0002] Formation pressure is a key parameter in drilling engineering design, which refers to the pressure acting on pore fluids (oil, gas, water) in rocks due to the compaction of sediments. At present, there are mainly two types of formation pressure evaluation methods commonly used: one is based on sediment compaction theory, mainly Eaton method, equivalent depth method and improved DC index method; the other is based on the effective stress theorem, through experiments or theoretical derivation, Establish the relationship model among P-wave velocity, effective stress and rock physical parameters. For example, the paper "The method and application of joint prediction of formation pressure by compressional wave velocity and shear wave velocity" (Natural Gas Geosciences, Vol. 26, No. 2) introduces a formation pressu...

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/306
Inventor 郭旭升屈大鹏孙均彭嫦姿苏建龙王明飞
Owner CHINA PETROLEUM & CHEM CORP
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