断层破碎带识别及其在断块油田开发中的应用

doi:10.7623/syxb201201010

石油学报 ›› 2012, Vol. 33 ›› Issue (1): 82-89.DOI: 10.7623/syxb201201010

断层破碎带识别及其在断块油田开发中的应用

金　强 1　周进峰 1,2　王端平 3　杨　勇 3

1 中国石油大学地球科学与技术学院　山东青岛　266555；2 中国石化江苏油田分公司　江苏扬州　225009；3 中国石化胜利油田分公司　山东东营　257061

收稿日期:2011-05-05 修回日期:2011-08-22 出版日期:2012-01-25 发布日期:2012-03-22
通讯作者: 金　强
作者简介:金　强，男，1956年5月生，1982年毕业于华东石油学院，现为中国石油大学(华东)教授、博士生导师，主要从事油气地质科研与教学工作。
基金资助:
国家重点基础研究发展规划（973）项目(2011CB201001)和中国石化重点研究项目(P09037)资助。

Identification of shattered fault zones and its application in development of fault-block oilfields

JIN Qiang 1　ZHOU Jinfeng 1,2　WANG Duanping 3　YANG Yong 3

Received:2011-05-05 Revised:2011-08-22 Online:2012-01-25 Published:2012-03-22

摘要/Abstract

摘要：

断层破碎带是由断面附近派生裂缝和断面充填物组成的地质体，在地表露头容易识别，但是在地下油田的鉴别还是一个难题。利用测井信息结合相关地质资料在东辛断块油田尝试了此项研究，在反复的测井曲线对比基础上，利用裂缝发育系数（F_dr）识别出了派生裂缝（F_dr≥0.35）和断面充填物（F_dr<0.35）。通过对永3块和辛109块不同级别断层的研究，发现了4种类型的断层破碎带：①派生裂缝断面充填物派生裂缝组成的对称结构断层破碎带；②派生裂缝断面充填物组成的非对称结构断层破碎带；③结构不完整的断层破碎带，可进一步细分为只有派生裂缝的断层破碎带和只有断面充填物的断层破碎带两种；④结构复杂的断层破碎带。对永3块不同级别断层的断层破碎带结构及展布特征的研究表明，断面充填物、派生裂缝及周围储层具有不同的岩石物性和排替压力，并在讨论断块油田剩余油挖潜问题的基础上，部署了3口水平井。

关键词: 断层破碎带, 派生裂缝, 断面充填物, 测井识别, 断块油田, 东辛油田

Abstract:

A shattered fault zone is defined as a geological body composed of fractures derived from fault movement and fragment fillers between two walls of a fault, it can be identified easily from outcrop but difficultly in subsurface. Based on repeated comparisons of well logging and related geological data, the authors identified 4 types of shattered fault zones in the Dongxin Oilfield of the Jiyang Depression, i.e. ①the symmetrical shattered fault zone with a configuration of induced fractures-fragment fillers-induced fractures, ②the unsymmetrical shattered fault zone with a configuration of induced fractures-fragment fillers, ③the incomplete shattered fault zone with either induced fractures or fragment fillers, and ④the complex shattered fault zone without fixed induced fractures or fragment fillers. A key coefficient （F_dr） was used successfully in the identification, namely if F_dris≥0.35, it is an induced fracture and if F_dr is <0.35, it is a fragment filler. By examining structural and distributional characteristics of shattered fault zones with different sizes in the Yong-3 block, we found that the thickness, petrophysics and displacement pressure of induced fractures and fragment fillers were key factors for the fault sealing property. The distribution of shattered fault zones was then mapped and applied to the allocation of 3 horizontal wells so as to recover the remaining oil in fault blocks.

Key words: shattered fault zone, induced fracture, fragment filler, identification with well-logging, fault-block oilfield, Dongxin Oilfield

金　强　周进峰　王端平　杨　勇. 断层破碎带识别及其在断块油田开发中的应用[J]. 石油学报, 2012, 33(1): 82-89.

JIN Qiang　ZHOU Jinfeng　WANG Duanping　YANG Yong. Identification of shattered fault zones and its application in development of fault-block oilfields[J]. Editorial office of ACTA PETROLEI SINICA, 2012, 33(1): 82-89.

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断层破碎带识别及其在断块油田开发中的应用

Identification of shattered fault zones and its application in development of fault-block oilfields

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