鄂尔多斯盆地镇原—泾川地区断层特征及控油意义  

Fault characteristics and oil-controlling effects in Zhenyuan-Jingchuan District,Southwestern Ordos Basin

作　　者：潘杰[1,2] 刘忠群[3] 蒲仁海[1,2] 周思宾[3] 范久霄[3] 刘祎楠[1,2] 

机构地区：[1]西北大学大陆动力学国家重点实验室,陕西西安710069 [2]西北大学地质学系,陕西西安710069 [3]中国石化华北分公司研究院,河南郑州450006

出　　处：《石油地球物理勘探》2017年第2期360-370,共11页Oil Geophysical Prospecting

基　　金：国家自然科学基金重大项目"非常规油气勘探与开发地球物理基础理论与研究方法"(41390451)之"中国非常规油气储层特征;分类与典型地质模型建立";中国石化华北分公司企业委托项目联合资助

摘　　要：通过综合解释镇原—泾川地区的钻井和三维地震资料,分析了走滑断层的分布规律、形成期、应力性质及其对长8油藏和高产井的控制作用,得出以下认识:(1)研究区在印支期的NE-SW向挤压作用力下形成了NEE和NNE向"X"型共轭剪切断层,在燕山期的SE向右旋压扭作用力下形成NW向断层,NEE向断层持续活动,NNE向断层活动不明显;(2)走滑断层分为Ⅰ、Ⅱ、Ⅲ等3类,其中Ⅰ类自奥陶系及以下地层断至白垩系及以上地层,平面延伸最长,断开地层最厚,在平面上共发育NW和NEE向两组断裂带,Ⅱ类自三叠系内部断至白垩系及以上地层,在平面上主要呈NE向延伸,Ⅲ类自奥陶系及以下地层断至中、上二叠统,在平面上主要呈NNE向延伸;(3)高产水平井均沿Ⅰ类走滑断层分布,沿Ⅱ、Ⅲ类走滑断层分布的长8砂岩多为水层或含油水层。With the comprehensive interpretation of 3-D seismic and drilling data in Zhenyuan-Jingchuan survey, we analyze the distribution, formation period, stress nature of the strike-slip faults, and its oil-control effect on the Chang-8 reservoir, and obtain the following observations: (1) The NEE-NNE X conjugate faults were formed under the NE-trending compressive forces during the Indosinian period, the NW-SE and NE-SW strike-slip faults were formed under the SE dextral shear forces during Yanshanian periods, the NEE trending faults are stronger than the NNE trending faults; (2) The strike-slip faults can be divided into 3 classes, the class I strike-slip faults cut the strata from the Ordovician through the Cretaceous, which developed two sets of the upright shear faults in the NW and the NEE directions. The Class II strike-slip faults disconnected the strata from the internal Triassic through the Cretaceous, extending in the NE direction. The Class III strike-slip faults cut through the strata from the Ordovician to the internal Permian, extending in the NEE direction; (3) High-yielding wells are distributed along the Class I strike-slip faults, and the water or oil-water layers are distributed along Class II and Class III strike-slip faults. © 2017, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.

关 键 词：镇原—泾川地区 相干积分比法 断裂特征 “X”型共轭剪切断层 走滑断层 

分 类 号：P631[天文地球—地质矿产勘探]