强变形区走滑断裂带伸展—聚敛应力效应构造解析及控气作用

doi:10.11764/j.issn.1672-1926.2018.04.011

天然气地球科学

强变形区走滑断裂带伸展—聚敛应力效应构造解析及控气作用

尹帅，李爱荣，陈梦娜，赵金利，丁文龙，赵靖舟，曹翔宇

1.西安石油大学地球科学与工程学院，陕西西安 710065; 2.中国石油山西煤层气勘探开发分公司，山西晋城 048000; 3.中国地质大学能源学院，北京 100083

收稿日期:2017-07-09 修回日期:2018-04-17 出版日期:2018-11-10
通讯作者: 李爱荣(1976-)，女，河北沧州人，副教授，博士，主要从事油藏描述、油气田地质与开发研究及教学工作. E-mail:lar9503@163.com
作者简介:尹帅(1989-)，男，山东新泰人，讲师，博士，主要从事石油地质研究.E-mail：speedysys@163.com.
基金资助:
国家自然科学基金面上项目（编号：41772140）；国家“十三五”科技重大专项（编号：2017ZX05035001-007）联合资助.

Stretch-convergence stress effect tectonic analysis and gas controlling of strike-slip fault zone in strong deformed zone

Yin Shuai，Li Ai-rong，Chen Meng-na，Zhao Jin-li，Ding Wen-long，Zhao Jing-zhou，Cao Xiang-yu

1.School of Earth Science and Engineering， Xi’an Shiyou University， Xi’an 710065， China; 2.China Petroleum Shanxi Coalbed Methane Exploration and Development Branch， Jincheng 048000， China; 3.School of Energy Resources， China University of Geosciences， Beijing 100083， China

Received:2017-07-09 Revised:2018-04-17 Online:2018-11-10

摘要/Abstract

摘要： 沁水盆地处于华北板块内部，是一个中、新生代构造活动活跃的残留型盆地。盆地内部地层普遍发生了强烈变形，发育大量走滑断裂。走滑断裂的排列组合能指示局部地层应力环境并影响储层物性。以沁水盆地南部地区为解剖区，详细分析了强变形区走滑断裂带的伸展—聚敛应力效应及其对致密储层产能的影响。研究结果表明，研究区自喜马拉雅期以来，主要受来自于北东向的挤压应力的影响，断裂具有右行走滑的性质。在这种应力场作用下，右行右阶断裂指示伸展区，而右行左阶断裂指示聚敛区。基于该原理对伸展区和聚敛区进行了划分，从这2类区域的平面分布特征来看，从西北方向到东南方向，两者具有一定交互分布的特征。对于研究区东部的樊庄区块，自北向南，断裂走向呈“S型”的分布变化趋势；其中部伸展区为“S型”区域的肘部或转折端，或称“应力转折带”。应力转折带的构造应力场复杂，裂缝通常较为发育，为伸展区。具有较高产能的气井主要分布在伸展区，而聚敛区气井的产能则通常较低。气井产能分布情况与伸展—聚敛应力效应分析结果一致，验证了该构造解析方法的可靠性。

关键词: 走滑断裂带, 伸展区, 聚敛区, 致密储层, 产能

Abstract: The Qinshui Basin is located inside the North China Plate and is an active residual basin in the Mesozoic and Cenozoic tectonic activity.The strata in the basin have been strongly deformed and developed a lot of strike-slip faults.The combination of strike-slip faults can indicate the stress of the local formation and affect the petrophysical properties of the reservoir.In this paper， the extensional-convergence stress effect of the strike-slip fault zone in the strong deformed zone and its effect on the capacity of the tight reservoir are analyzed in detail in the southern Qinshui Basin.The results show that the study area has been influenced by the compressive stress from the north east since the Himalayan Period， and the fault has the property of dextral strike slip.Under the action of this stress field， the right-hand right-order fault indicates the extension region， and the right-hand left-order fault indicates the convergence region.Based on this principle， the extension area and the convergence area are divided.From the northwest direction to the southeast direction， the two regions have interactive distribution characteristics.For the Fanzhuang block in the eastern part of the study area， the distribution of the faults have a “S-type” trend from north to south， and the middle extension region is the elbow or the turning end of the “S-type” area， or called the “Stress transition zone”.The tectonic stress field of the stress transition zone is complex and the fracture is usually developed.Gas wells with higher capacity are mainly distributed in the extension zone， while the capacity of the gas wells in the converging area is usually low.The results show that the reliability of the tectonic analysis method is consistent with that of the extensional-aggregation stress effect analysis.

Key words: Strike-slip fault zone, Extension area, Convergence area, Tight reservoir, Capacity

中图分类号:

TE121.1⁺1

尹帅, 李爱荣, 陈梦娜, 赵金利, 丁文龙, 赵靖舟, 曹翔宇. 强变形区走滑断裂带伸展—聚敛应力效应构造解析及控气作用[J]. 天然气地球科学, 2018, 29(11): 1568–1574.

Yin Shuai, Li Ai-rong, Chen Meng-na, Zhao Jin-li, Ding Wen-long, Zhao Jing-zhou, Cao Xiang-yu. Stretch-convergence stress effect tectonic analysis and gas controlling of strike-slip fault zone in strong deformed zone[J]. Natural Gas Geoscience, 2018, 29(11): 1568–1574.

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