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Method for analyzing fluid factor sensibility

A fluid factor and sensitivity technology, applied in seismic signal processing and other directions, can solve problems affecting reliability and poor universality

Inactive Publication Date: 2015-06-17
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0005] For reservoir and fluid prediction methods based on geophysics, there are many kinds of fluid factors popular at home and abroad, and the universality in practical applications is not good, and the calculation method is mainly based on the indirect algebraic combination of elastic parameters, which is affected by the inherent problems of seismic inversion. The ill-conditioned effect of will lead to a large cumulative error, affecting the reliability of practical applications

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  • Method for analyzing fluid factor sensibility
  • Method for analyzing fluid factor sensibility
  • Method for analyzing fluid factor sensibility

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Embodiment Construction

[0035] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below and described in detail in conjunction with the accompanying drawings.

[0036] Such as figure 1 as shown, figure 1 It is a flowchart of a specific embodiment of the method for analyzing fluid factor sensitivity of the present invention.

[0037] In step 101, a sand-mudstone interbedded model is constructed.

[0038] The sand-mudstone interbedded model is constructed, using mudstone as caprock and sandstone as reservoir, and endowing sand-mudstone with different P-wave velocities, shear-wave velocities, and densities, which can be further simulated by pre-stack forward modeling based on the Zoeppritz equation. Changes in distance, such as figure 2 The sand-mudstone interbedded model is shown. The process goes to step 102.

[0039] At step 102, fluid replacement is performed.

[0040] Fluid substitution based on...

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Abstract

The invention provides a method for analyzing fluid factor sensibility. The method for analyzing the fluid factor sensibility comprises the steps that first, a sand shale interbedding model is constructed; second, fluid substitution is carried out; third, a plurality of fluid factors are selected; fourth, quantitative analysis of the fluid factor sensibility is conducted. According to the method for analyzing the fluid factor sensibility, the fluid factor sensibility is studied, the fluid substitution based on a Gassmann equation is achieved, and the compressional and shear velocity and density change of fluid saturated rocks after the fluid substitution can be analyzed in a quantitative mode; on this basis, the different fluid factors are selected, and the sensibility of the different fluid factors can be analyzed in a quantitative mode by calculating the sensitivity coefficient of the fluid factors.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a method for analyzing fluid factor sensitivity. Background technique [0002] With the increasing difficulty of oil and gas exploration and development, how to obtain reservoir fluid characteristic parameters from seismic data has become a research hotspot in reservoir geophysics. Prestack inversion, as an important means to obtain fluid characteristic parameters, is more and more widely used. The current pre-stack inversion is mainly to obtain information such as vertical and horizontal impedances. How to directly extract fluid factors more accurately and improve the accuracy of inversion results is the key to the research and application of pre-stack inversion. [0003] Many exploratory wells deployed by Shengli Oilfield in the Chengdao area during the "Eleventh Five-Year Plan" period failed. The main reason for the failure was that the prediction of the reservoi...

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Application Information

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IPC IPC(8): G01V1/30
Inventor 杨培杰刘书会罗红梅徐希坤王长江张景涛董立生刘华夏邵卓娜张娟李凤英张志敬周伟邹文勇屈冰
Owner CHINA PETROLEUM & CHEM CORP
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