辽河坳陷陈家断裂带北部构造演化解析及油气成藏

doi:10.12108/yxyqc.20240312

岩性油气藏 ›› 2024, Vol. 36 ›› Issue (3): 127–136.doi: 10.12108/yxyqc.20240312

辽河坳陷陈家断裂带北部构造演化解析及油气成藏

西智博¹, 廖建平^1,2, 高荣锦³, 周晓龙³, 雷文文³

1. 湖南科技大学地球科学与空间信息工程学院, 湖南湘潭 411201;
2. 重庆科技大学非常规油气开发研究院, 重庆 401331;
3. 中国石油辽河油田公司, 辽宁盘锦 124010

收稿日期:2023-08-07 修回日期:2023-09-05 出版日期:2024-05-01 发布日期:2024-04-30
第一作者:西智博（1997—），女，湖南科技大学在读硕士生，研究方向为地球物理学。地址:（411201）湖南省湘潭市雨湖区湖南科技大学。Email:940019092@qq.com。
基金资助:
国家自然科学基金项目“部分饱和岩石的粘声波频变各向异性理论研究”（编号：42074167）、国家自然科学基金项目“三维各向异性裂缝探测的纵波地震响应方法研究”（编号：41874156）、湖南省自然科学基金“周期性流体饱和层状孔隙介质中地震频散、衰减与频变各向异性方法研究”（编号：2023JJ30234）联合资助。

Tectonic evolution and hydrocarbon accumulation in northern Chenjia fault zone，Liaohe Depression

XI Zhibo¹, LIAO Jianping^1,2, GAO Rongjin³, ZHOU Xiaolong³, LEI Wenwen³

1. School of Earth Sciences and Spatial Information Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China;
2. Institute of Unconventional Oil and Gas Development, Chongqing University of Science and Technology, Chongqing 401331, China;
3. PetroChina Liaohe Oilfield Company, Panjin 124010, Liaoning, China

Received:2023-08-07 Revised:2023-09-05 Online:2024-05-01 Published:2024-04-30

摘要/Abstract

摘要： 辽河坳陷陈家断裂带油气资源丰富，是辽河西部凹陷北段重要的含油气区带之一。基于构造演化解析，结合砂箱物理模拟实验，分析了辽河坳陷陈家断裂带的变形机制和演化过程，并指出其对油气成藏的控制作用。研究结果表明：①辽河坳陷陈家断裂带具有分段发育特征，且活动时期具有“先北后南”的演化特征，受断层分段性影响，陈家断裂带主要发育压扭背冲构造样式和走滑压扭构造样式。②物理模拟实验结果显示，台安—大洼断裂上盘在压扭作用影响下首先形成压扭性质的雁行小断裂，随着位移增大，小断裂逐渐连接，最终形成了贯穿型走滑断裂带，即陈家断裂带。③台安洼陷为新生代多期次构造变形叠加形成的洼陷，深层发育主力烃源岩层系，具备发育大规模油气藏的物质基础，洼陷边缘的钻井岩心分析结果显示，烃源岩TOC 值为 4.79%，R_o为 0.3%~0.4%，属于好—较好烃源岩，推测洼陷中心厚度更大，质量更优。陈家断裂带中北部下盘发育断鼻构造，具备陈家洼陷和台安洼陷双源供烃的特点，是油气聚集的有利场所。

关键词: 构造演化, 构造物理模拟, 油气成藏, 走滑压扭, 压扭背冲, 双源供烃, 断鼻构造, 古近系, 陈家断裂带, 辽河坳陷

Abstract: The Chenjia fault zone in Liaohe Depression is rich in oil and gas resources and is one of the important oil and gas bearing zones in the west sag of Liaohe Depression. Based on structural evolution, combined with sand-box physical simulation experiments, the deformation mechanism and evolution process of Chenjia fault zone in Liaohe Depression were analyzed, and its control effects on hydrocarbon accumulation were analyzed. The results show that:（1）The Chenjia fault zone in Liaohe Depression has the evolution characteristics of segmented development and gradually becoming late from north to south during the activity period. Under the influence of fault segmentation, Chenjia fault zone mainly develops compression-torsion back-thrust and strike-slip com‐pression-torsion structural styles.（2）The results of physical simulation experiments show that under the influence of compression-torsion, compression-torsion en echelon small faults were first formed at the hanging wall of Taian-Dawa fault. As the displacement increases, the small faults were gradually connected, and finally the through-strike-slip fault zone, namely the Chenjia fault zone, was formed.（3）Taian depression is a depression formed by the superposition of multi-stage tectonic deformation in Cenozoic, and the main hydrocarbon source rock series is developed in deep layers, which has the material basis for the development of large-scale oil and gas reservoirs. The analysis results of drilling cores at the edge of the depression show that the TOC value of the source rock is 4.79%, and the R_o value is 0.3%-0.4%, belonging to good source rocks. It is speculated that source rocks in the depression center have larger thickness and bettwe quality. The fault nose structure is developed at the footwall of the central and northern Chenjia fault zone, which has the characteristics of dual source hydrocarbon supply in Chenjia depression and Taian depression, and is a favorable zone for oil and gas accumulation.

Key words: tectonic evolution, structural physics simulation, hydrocarbon accumulation, strike-slip compressiontorsion, compression-torsion back-thrust, dual source hydrocarbon supply, fault nose structure, Paleogene, Chenjia fault zone, Liaohe Depression

中图分类号:

TE121.2

西智博, 廖建平, 高荣锦, 周晓龙, 雷文文. 辽河坳陷陈家断裂带北部构造演化解析及油气成藏[J]. 岩性油气藏, 2024, 36(3): 127–136.

XI Zhibo, LIAO Jianping, GAO Rongjin, ZHOU Xiaolong, LEI Wenwen. Tectonic evolution and hydrocarbon accumulation in northern Chenjia fault zone，Liaohe Depression[J]. Lithologic Reservoirs, 2024, 36(3): 127–136.

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辽河坳陷陈家断裂带北部构造演化解析及油气成藏

Tectonic evolution and hydrocarbon accumulation in northern Chenjia fault zone，Liaohe Depression

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