塔北南缘奥陶系层序地层对岩溶储层的控制作用

doi:10.7623/syxb2012S2013

石油学报 ›› 2012, Vol. 33 ›› Issue (S2): 135-144.DOI: 10.7623/syxb2012S2013

塔北南缘奥陶系层序地层对岩溶储层的控制作用

斯春松 1 　乔占峰 2,3　沈安江 2,3 　张丽娟 4　李国蓉 5 　倪新锋 2,3

1. 中国地质大学资源学院湖北武汉 430074; 2. 中国石油杭州地质研究院浙江杭州 310023;3. 中国石油天然气集团公司碳酸盐岩储层重点实验室浙江杭州 310023;4. 中国石油塔里木油田公司勘探开发研究院新疆库尔勒 841000; 5. 成都理工大学能源学院四川成都 610059

收稿日期:2012-06-11 修回日期:2012-09-25 出版日期:2012-12-25 发布日期:2013-03-01
通讯作者: 斯春松
作者简介:斯春松，男，1968年2月生，1990年毕业于中国地质大学（武汉），现为中国地质大学（武汉）石油与天然气工程专业博士研究生，主要从事油气沉积储层方面的研究工作。
基金资助:
国家重大科技专项（2011ZX05004-002）资助。

The controlling effect of sequence stratigraphy on karst reservoirs of Ordovician in the south margin of northern Tarim Basin

SI Chunsong 1 　QIAO Zhanfeng 2, 3　 SHEN Anjiang 2, 3 　ZHANG Lijuan 4　 LI Guorong 5 　NI Xinfeng 2, 3

Received:2012-06-11 Revised:2012-09-25 Online:2012-12-25 Published:2013-03-01

摘要/Abstract

摘要：

通过对塔北南缘奥陶系层序地层研究与地质背景、岩石力学性质和水文学进行综合分析，探讨了内幕区岩溶储层的形成和发育分布规律。认识到研究区碳酸盐岩岩溶储层类型多样、特征复杂，但是发育分布上具有较为明显的纵向成层性和平面分带性，并沿断裂富集的规律。同时，认识到层序地层在演化过程中通过对沉积和地层结构等方面的控制，影响了构成岩溶流体渗滤通道和溶蚀场所的孔隙和裂缝带的发育，间接地控制了岩溶储层的形成和发育分布。其主要表现在以下3个方面：①层序地层控制的礁滩体构成了岩溶储层的物质基础;②层序演化对地层结构的控制决定裂缝发育密度;③二级层序界面为大气水或埋藏流体运移的指向区，有利后期岩溶作用改造。这些认识将规律性强的层序地层和非均质性强的岩溶储层建立了关系，对非潜山型岩溶缝洞储层的勘探开发具有重要意义。

关键词: 层序地层, 碳酸盐岩, 岩溶储层, 塔北南缘, 奥陶系

Abstract:

Based on the study of sequence stratigraphy with integrated analyses of the geologic setting, rock mechanics properties and hydrology, this study investigated the formation and development patterns of the Ordovician internal karst reservoirs in the south margin of northern Tarim Basin. The Ordovician carbonate karst reservoirs were found highly diverse and complex. These carbonate karst reservoirs were characterized by obvious vertical stratification and plane zonation, showing enrichment along the faults. Due to its effect on the sedimentation and stratigraphic structure, the sequence stratigraphy influenced the development of pore and fracture systems which constituted the percolation passages of karst fluid and the dissolution space. It indirectly controlled the formation and development of karst reservoirs from the following aspects:(1) The material basis of karst reservoirs was formed by reef-shoal bodies controlled by sequence stratigraphy; (2) The density of fracture development was determined by the controlling effect of sequence evolution on stratigraphic structure; and (3) The second-order sequence boundary, which was the favorable migration oriented region of meteoric water or burial fluid, favored the late karstification. These established a relationship between the sequence stratigraphy with specific regularity and the karst reservoirs with strong heterogeneity, with implications for further exploration and development of un-buried-hill karst-vuggy reservoirs.

Key words: sequence stratigraphy, carbonate rock, karst reservoir, south margin of northern Tarim Basin, Ordovician

斯春松乔占峰沈安江张丽娟李国蓉倪新锋 . 塔北南缘奥陶系层序地层对岩溶储层的控制作用[J]. 石油学报, 2012, 33(S2): 135-144.

SI Chunsong QIAO Zhanfeng SHEN Anjiang ZHANG Lijuan LI Guorong. The controlling effect of sequence stratigraphy on karst reservoirs of Ordovician in the south margin of northern Tarim Basin[J]. Editorial office of ACTA PETROLEI SINICA, 2012, 33(S2): 135-144.

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塔北南缘奥陶系层序地层对岩溶储层的控制作用

The controlling effect of sequence stratigraphy on karst reservoirs of Ordovician in the south margin of northern Tarim Basin

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