塔中北坡走滑断裂成因机理与油气成藏

doi:10.11743/ogg20180110

石油与天然气地质 ›› 2018, Vol. 39 ›› Issue (1): 98-106.doi: 10.11743/ogg20180110

塔中北坡走滑断裂成因机理与油气成藏

宁飞^1,2,3, 金之钧^1,3, 张仲培³, 云金表^1,2,3, 张继标³

1. 页岩油气富集机理与有效开发国家重点实验室, 北京 100083;
2. 中国石化石油勘探开发研究院构造与沉积储层实验室, 北京 100083;
3. 中国石化石油勘探开发研究院, 北京 100083

收稿日期:2017-08-26 修回日期:2017-10-23 出版日期:2018-02-28 发布日期:2018-03-12
第一作者简介:宁飞(1981-),男,博士、高级工程师,盆地分析与油区构造解析。E-mail:ningfei.syky@sinopec.com。
基金项目:
国家自然科学基金项目（41602158）；中石化科技部项目（P15089）；国家基础研究发展计划（973计划）项目（2012CB412800）；中国科学院A类战略性光导科技专项（XDA14010402）；国家科技重大专项（2017ZX05005001-001）。

Mechanism of strike-slip faulting and hydrocarbon accumulation in northern slope of Tazhong area

Ning Fei^1,2,3, Jin Zhijun^1,3, Zhang Zhongpei³, Yun Jinbiao^1,2,3, Zhang Jibiao³

1. State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China;
2. Laboratory of Structural and Sedimentological Reservoir Geology, Exploration & Production Research Institute, SINOPEC, Beijing 100083, China;
3. Exploration & Production Research Institute, SINOPEC, Beijing 100083, China

Received:2017-08-26 Revised:2017-10-23 Online:2018-02-28 Published:2018-03-12

摘要/Abstract

摘要： 塔中北坡发育一系列NE向走滑断裂。为了揭示走滑断裂形成机理及其对油气成藏的影响，在对走滑断裂几何学样式详细解析的基础上，运用物理模拟方法对塔中北坡NE向走滑断裂的演化过程进行了模拟。结果表明，在单一应力状态下，由于差异推挤和基底剪切共同作用，走滑断裂在平面和剖面上发育了不同的样式，沿断裂走向具有分段性特征。结合构造背景分析，认为塔中北坡走滑断裂成因机理受控于两种因素，即由于塔中Ⅰ号断裂带存在分段性，在加里东末期—海西早期北东向应力场作用下，使塔中隆起对北坡形成强度差异的推挤作用；其次，塔中北坡NE向基底断裂活动造成基底剪切作用，拖动上覆上奥陶统、志留系、泥盆系在左行力偶下运动。NE向走滑断裂的存在对塔中北坡油气成藏具有一定贡献：一方面走滑断裂会诱导高角度构造裂缝发育，从而沟通了储集空间，另一方面，走滑断裂的活动为塔中北坡多层系立体成藏提供了便利。

关键词: 分段性, 断裂样式, 油气成藏, 走滑断裂, 塔中地区, 塔里木盆地

Abstract: A series of NE trending strike-slip faults developed in northern sloped of Tazhong area.In order to unravel the forming mechanism and its implication on hydrocarbon accumulation of strike-slip faults, detailed analysis upon geometric styles of strike-slip faults was performed, and the evolutional process of NE trending slip-faults in northern Tazhong area was simulated by using physical analogue model method.The results show that development of different planar and sectional structural styles of strike-slip faults is induced by differential pushing and basement shear effect under simple contractional stress field.Segmentation of characteristics is also observed along faults trending.It is concluded by physical analogue results integrated with structural background analysis that the forming mechanism of strike-slip faults in northern slope of Tazhong area was controlled by two factors.Firstly, the segmentation of Tazhong I fault gave the northern slope of Tazhong area a differential pushing stress in NE direction at the late Caledonian-early Hercynian.Secondly, NE trending basement faults activity in northern Tazhong area resulted in basement shear effect, which drag overlying upper Ordovician, Silurian, Devonian strata sinistrally.The existence of NE trending strike-slip faults contribute to hydrocarbon accumulation in northern slope of Tazhong area.On the one hand, high-angle structural faults development induced by strike-slip faults connects reservoir sections.On the other hand, faulting of strike-slip facilitates multi-layers hydrocarbon accumulation in northern slope of Tazhong area.

Key words: segmentation, fault style, hydrocarbon accumulation, strike-slip fault, Tazhong area, Tarim Basin

中图分类号:

TE121.2

宁飞,金之钧,张仲培,等. 塔中北坡走滑断裂成因机理与油气成藏[J]. 石油与天然气地质, 2018, 39(1): 98-106. doi: 10.11743/ogg20180110 Ning Fei,Jin Zhijun,Zhang Zhongpei,et al. Mechanism of strike-slip faulting and hydrocarbon accumulation in northern slope of Tazhong area[J]. Oil & Gas Geology, 2018, 39(1): 98-106. doi: 10.11743/ogg20180110

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塔中北坡走滑断裂成因机理与油气成藏

Mechanism of strike-slip faulting and hydrocarbon accumulation in northern slope of Tazhong area

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