准噶尔西缘车排子凸起东北部断层封闭性

doi:10.11743/ogg20140508

石油与天然气地质 ›› 2014, Vol. 35 ›› Issue (5): 639-645.doi: 10.11743/ogg20140508

准噶尔西缘车排子凸起东北部断层封闭性

董大伟¹, 李理¹, 刘建², 赵利¹, 刘海剑¹

1. 中国石油大学(华东) 地球科学与技术学院, 山东青岛 266555;
2. 中国石化胜利油田分公司地质科学研究院, 山东东营 257000

收稿日期:2014-02-27 修回日期:2014-05-08 出版日期:2014-10-08 发布日期:2014-10-17
通讯作者: 李理（1967- ），女，博士、教授，构造地质学。E-mail：lilywmwys@upc.edu.cn。 E-mail:lilywmwys@upc.edu.cn。
作者简介:董大伟（1984- ），男，博士研究生，地质学。E-mail：18105468200@163.com。

Sealing ability of faults in northeastern Chepaizi Uplift at western margin of Junggar Basin

Dong Dawei¹, Li Li¹, Liu Jian², Zhao Li¹, Liu Haijian¹

1. School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China;
2. Geological Research Institute, Shengli Oilfield Company, SINOPEC, Dongying, Shandong 257000, China

Received:2014-02-27 Revised:2014-05-08 Online:2014-10-08 Published:2014-10-17

摘要/Abstract

摘要：

断层是车排子地区油气运移的主要通道，也能形成与之相关的油气藏，断层封闭性的研究对于确定研究区油气藏的空间分布有着极为重要的意义。通过定性分析断层活动期与生排烃期的匹配关系以及断层特征，定量评价断层两盘岩性配置关系、泥岩涂抹及断面正应力等控制封闭性能的各个要素，对车排子凸起东北部F1和F2两条主要断层进行封闭性分析，最终应用模糊评价方法进行综合评判。结果表明：F1断层和F2断层封闭性具有“纵向上分期，平面上分段”的变化特征，纵向上分为白垩系、新近系沙湾组一段、沙湾组二段和沙湾组三段4期。其中，白垩系断层封闭性平面上整体好，仅F2断层的南段封闭性差；沙一段地层F1断层的封闭性具有北段好、中段差、南段较好-较差的变化特征，F2断层封闭性整体差-较差；沙二段地层断层封闭性整体好；沙三段地层断层封闭性整体差，仅F2断层中段封闭性好。

关键词: 泥岩涂抹, 断面正应力, 模糊综合评价, 断层活动期, 断层封闭性, 车排子凸起, 准噶尔西缘

Abstract:

Faults are the main oil-gas migration pathways in Chepaizi area and can also form associated hydrocarbon re-servoirs,thus research on fault sealing ability is of great significance for confirming spatial distribution of reservoirs in the study area.Through qualitative analysis of fault characteristics and the timing between faulting and hydrocarbon generation and expulsion,and quantitative evaluation of factors controlling sealing ability such as juxtaposition of lithology,shale smear,and normal stress on fault surface,we studied the sealing ability of two major faults(F1 and F2)in northeastern Chepaizi Uplift,and performed comprehensive judgment by using fuzzy evaluation method.The results show that the sea-ling abilities of F1 and F2 feature in ‘vertical periods and lateral segmentation’.Vertically,the fault sealing ability can be divided into periods,including Cretaceous(K),the first member of Neogene Shawan Fm (N₁s¹),2^nd member of Neogene Shawan Fm(N₁s²),and 3^rd member of Neogene Shawan Fm(N₁s³).The sealing ability of faults in Cretaceous is good as a whole except for the southern segment of F2.For N₁s¹,sealing ability of F1 is good in the northern segment,poor in the middle segment,and good to poor in the southern segment,while that of F2 is poor to fair as a whole.For N₁s²,fault sealing abilities are good as a whole.For N₁s³,fault sealing abilities are poor as a whole,except for the middle segment of F2 whose sealing ability is good.

Key words: shale smear, normal stress on fault surface, fuzzy evaluation, fault activity stage, fault sealing ability, Chepaizi Uplift, western margin of Junggar Basin

中图分类号:

TE122.1

董大伟,李理,刘建,等. 准噶尔西缘车排子凸起东北部断层封闭性[J]. 石油与天然气地质, 2014, 35(5): 639-645. doi: 10.11743/ogg20140508 Dong Dawei,Li Li,Liu Jian,et al. Sealing ability of faults in northeastern Chepaizi Uplift at western margin of Junggar Basin[J]. Oil & Gas Geology, 2014, 35(5): 639-645. doi: 10.11743/ogg20140508

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准噶尔西缘车排子凸起东北部断层封闭性

Sealing ability of faults in northeastern Chepaizi Uplift at western margin of Junggar Basin

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