Quantitative forecasting method of tectonic fissure occurrence

A technology of fracture occurrence and prediction method, which is applied in the field of oil and gas field exploration and development, and can solve the problem that the occurrence of structural fractures cannot be accurately predicted.

Inactive Publication Date: 2014-12-10
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0004] The present invention aims to solve the above problems, and provides a method for quantitatively predicting the occurren

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  • Quantitative forecasting method of tectonic fissure occurrence

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specific Embodiment approach

[0176] The specific technical scheme of the present invention is illustrated by taking the quantitative prediction of the occurrence of structural fractures in the second member of the Funing Formation (abbreviated as the second member of the Funing Formation) of the Tongcheng fault zone in the Jinhu Sag of the Subei Basin as an example:

[0177] The Tongcheng Fault Zone is located in Jinhu County, Jiangsu Province, and the research area is mainly located in the eastern wing of Subei Basin-Dongtai Depression-Jinhu Sag-Tongcheng Fault Zone. The Tongcheng fault is a typical strike-slip fault, which meets the Yangcun fault at the boundary of the Jinhu Sag in the south and disappears in the Tongcheng area to the north ( Figure 7 ). The main oil-producing layer in the study area is the Fu 2 Member, and the reservoir properties are poor, and the lithology is mainly low-permeability siltstone.

[0178] Since the deposition of the Fu 2 Member, the Tongcheng fault zone has mainly exp...

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Abstract

The invention relates to the field of oil-gas field exploration and development, particularly to a quantitative forecasting method of tectonic fissure occurrence. The quantitative forecasting method includes firstly determining a fissure mechanical property and rock mechanics parameters in a research area and restoring a paleotectonic map; secondly performing a numerical simulation of a paleostress field; thirdly selecting an appropriate rock failure principle according to the simulated paleostress field and the fissure mechanical property, and forecasting the best occurrence and the second-best occurrence of paleofissures on the basis of plane shearing strength distribution or profile shearing strength distribution of the stress field in the research area; coupling spatial positions of the paleorock stratum and the current rock stratum based on the simulated ant tracing technique, and then establishing a spatial switching theoretical model of the paleorock stratum and the current rock stratum; performing the quantitative analysis of fissure kinematics characteristics, and forecasting the occurrence of the current fissures according to that of the paleofissures.

Description

technical field [0001] The invention relates to the field of exploration and development of oil and gas fields, in particular to a method for quantitatively predicting the occurrence of structural fractures. Background technique [0002] Long-term exploration and practice have proved that the use of tectonic stress field numerical simulation method to predict reservoir structural fractures has a good theoretical basis and is a relatively reliable fracture prediction method. The numerical simulation of the tectonic stress field is closely combined with the basic geological work, forming and developing a set of research methods based on numerical simulation and applying rock fracture criteria for quantitative fracture prediction. This method not only strictly considers the mechanism of fracture formation, but also can be combined with static data and dynamic data of oil and gas production. Therefore, it has achieved good application results in oilfields. A large number of stu...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 刘敬寿戴俊生刘敬富王新邓国成徐云飞史永坤杨晓宇徐珂任启强
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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