Method for predicting densities of different scales of fracture planes

A prediction method and surface density technology, applied in the field of oil and gas field exploration and development, can solve problems such as confusion of fracture surface density

Inactive Publication Date: 2017-01-04
CHINA UNIV OF GEOSCIENCES (BEIJING)
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Problems solved by technology

[0004] The present invention aims to solve the above problems, and provides a method for predicting the surface density of fractures in different scales, which solves the problem that the surface density prediction of fractures mainly focuses on the prediction of surface density of fractures in a single scale, and the surface density of fractures in different scales is confused. question

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  • Method for predicting densities of different scales of fracture planes
  • Method for predicting densities of different scales of fracture planes

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[0055] Structurally located in the west of Dongtai Depression in Subei Basin, Jinhu Sag is a faulted basin developed in Late Cretaceous. It starts from the Jianhu uplift in the north, extends to the Tianchang uplift in the south, adjoins the Zhangbaling uplift in the west, and borders the Lingtang Bridge and Liubao uplifts in the east, spanning Jiangsu and Anhui provinces geographically, with an area of ​​about 5,000km 2 , is the largest sedimentary sag in Subei Basin ( Figure 4 ). Under the control of the NE-trending Jianhu uplift and Tianchang uplift, restricted by the NE-trending Liubao low uplift, Lingtangqiao low uplift, and boundary Yangcun fault, during the depositional period of the Funing Formation, faults in the south and overlaps in the north, It is a dustpan-shaped depression that is steep in the south and gentle in the north, and spreads in a northeast direction.

[0056] The structure of Jinhu sag is a simple half-graben with single-fault faults and crossings....

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Abstract

The invention relates to the field of exploration and development of an oil and gas field, and particularly relates to a method for predicting densities of different scales of fracture planes. According to the method disclosed by the invention, after a fracture zone is subjected to datamation processing, representation on the densities of different scales of fracture planes is implemented by analyzing similarities of faults and fractures, selecting a suitable fractal and a suitable side length of a density calculation unit and deducing to design a corresponding algorithm. The method disclosed by the invention has high practical value on the aspects of prediction on the densities of different scales of fracture planes and the like, and is low in prediction cost and high in operability, and an evaluation result of the method has a certain guidance significance on multiple aspects of prediction on an oil and gas exploration key area and a fracture dominant distribution area, representation on a fracture pore penetration parameter in the later period and the like.

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 predicting surface density of fractures with different scales. Background technique [0002] In the study of reservoir fractures, researchers have gradually realized that fractures of different scales play different roles in oil and gas seepage, and how to realize the prediction of fracture surface density of different scales has become a bottleneck restricting fracture prediction. At present, the surface density prediction of fractures is mainly focused on the prediction of surface density of fractures at a single scale, and the confusion of surface densities of fractures at different scales often affects the accurate evaluation of fracture parameters. [0003] In the process of fracture analysis, people gradually realized that faults and cracks are products of different scales under the same stress field, and have statistical self-si...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/32
CPCG01V1/32
Inventor 刘敬寿丁文龙肖子亢谷阳
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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