塔中隆起中-下奥陶统岩溶水文地貌条件及控储机制

doi:10.7623/syxb201809004

石油学报 ›› 2018, Vol. 39 ›› Issue (9): 990-1005.DOI: 10.7623/syxb201809004

塔中隆起中-下奥陶统岩溶水文地貌条件及控储机制

张恒^1,2, 蔡忠贤^1,2, 漆立新³, 云露³, 曹自成³, 沙旭光³

1. 中国地质大学构造与油气资源教育部重点实验室湖北武汉 430074;
2. 中国地质大学资源学院湖北武汉 430074;
3. 中国石油化工股份有限公司西北油田分公司新疆乌鲁木齐 830011

收稿日期:2018-02-22 修回日期:2018-06-20 出版日期:2018-09-25 发布日期:2018-09-28
通讯作者: 蔡忠贤,男,1963年8月生,1985年获武汉地质学院学士学位,1999年获中国地质大学(北京)博士学位,现为中国地质大学(武汉)资源学院石油工程系教授,主要从事碳酸盐岩储层地质学研究。Email:zxcai@cug.edu.cn
作者简介:张恒,男,1988年11月生,2011年获中国地质大学(武汉)学士学位,2016年获中国地质大学(武汉)博士学位,现为中国地质大学(武汉)博士后,主要从事岩溶地质学、碳酸盐岩储层地质学和油藏描述研究。Email:cughzhang@163.com
基金资助:
中国科学院战略性先导科技专项（A类）（No.XDA14010302）和构造与油气资源教育部重点实验室开放基金课题（No.TPR-2014-19和No.TPR-2017-05）资助。

Hydrogeomorphological condition and its control mechanism on Mid-Lower Ordovician paleo-karst reservoirs,Tazhong uplift

Zhang Heng^1,2, Cai Zhongxian^1,2, Qi Lixin³, Yun Lu³, Cao Zicheng³, Sha Xuguang³

1. Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Hubei Wuhan 430074, China;
2. Faculty of Earth Resources, China University of Geosciences, Hubei Wuhan 430074, China;
3. Sinopec Northwest Oil Field Company, Xinjiang Urumqi 830011, China

Received:2018-02-22 Revised:2018-06-20 Online:2018-09-25 Published:2018-09-28

摘要/Abstract

摘要：

塔里木盆地塔中隆起中-下奥陶统古岩溶储层是深层碳酸盐岩油气勘探的重点目标。基于地震数据分析和地震属性提取，对塔中隆起的岩溶古地貌和古水文结构进行了精细刻画；通过钻井和成像测井对比、岩心和岩石学薄片观察，揭示了古岩溶储层空间分布的差异性；探讨了水文地貌条件对储层发育的控制作用。研究结果表明：①塔中隆起的中央主垒带位于古地形平坦的岩溶高地，发育以裂隙-扩散流为代表的流场结构；北斜坡带位于地势相对陡的岩溶斜坡，有利于形成顺层-径流的水流样式。②中央主垒带储层以裂缝-孔洞系统为主，为表层岩溶带的产物，其平面分布受控于NE和NWW向断裂；北斜坡带发育规模不一的孤立洞穴和多层溶蚀孔洞，其岩溶垂向结构相对完整。③由于水文地貌条件的差异，中央主垒带和北斜坡带分别形成了"裂隙-渗流"和"顺层-径流"表生岩溶储层发育模式，为储层预测提供了理论依据。

关键词: 表生岩溶, 水文地貌条件, 裂缝-孔洞系统, 岩溶储层发育模式, 中-下奥陶统, 塔中隆起, 塔里木盆地

Abstract:

Mid-Lower Ordovician paleo-karst reservoirs in the Tazhong uplift of Tarim Basin are the key targets of hydrocarbon exploration in deep-buried carbonate. Based on seismic volume analysis and seismic attribute extraction, the karst paleo-geomorphology and paleo-hydrological architecture of the Tazhong uplift were precisely delineated. Moreover, the variation in the spatial distribution of paleo-karst reservoirs was revealed by a correlation cross section of drilling and imaging logging, and core and thin-section petrological observations. Then the control effect of hydrogeomorphologic conditions on reservoir development was investigated in this study. The research results indicate that the central horst belt of the Tazhong uplift is located in karst highland with gentle paleo-terrain, where the flow field structure represented by fracture and diffuse flow is developed; the north-slope zone is located in karst slope with relatively steep terrain, which is beneficial for the formation of stratiform-runoff flow pattern. The reservoirs in the central horst zone are dominated by fissure-vug system produced in the epikarst zone, showing planar distribution controlled by NE and NWW-trending faults; the multi-layered corrosion vugs and isolated caves with different scales are developed in the north slope zone, showing a complete karst vertical structure. Because of the differences in hydrogeomorphologic conditions, the development patterns of "fissure-seepage" and "stratiform-runoff" epigenic karst reservoirs were established in the central horst zone and north slope zone respectively, providing theoretical references for reservoir prediction.

Key words: epigenic karst, hydrogeomorphologic condition, fissure-vug system, karst reservoir development pattern, Mid-Lower Ordovician, Tazhong uplift, Tarim Basin

中图分类号:

TE122.2

张恒, 蔡忠贤, 漆立新, 云露, 曹自成, 沙旭光. 塔中隆起中-下奥陶统岩溶水文地貌条件及控储机制[J]. 石油学报, 2018, 39(9): 990-1005.

Zhang Heng, Cai Zhongxian, Qi Lixin, Yun Lu, Cao Zicheng, Sha Xuguang. Hydrogeomorphological condition and its control mechanism on Mid-Lower Ordovician paleo-karst reservoirs,Tazhong uplift[J]. Acta Petrolei Sinica, 2018, 39(9): 990-1005.

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塔中隆起中-下奥陶统岩溶水文地貌条件及控储机制

Hydrogeomorphological condition and its control mechanism on Mid-Lower Ordovician paleo-karst reservoirs,Tazhong uplift

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