塔里木盆地顺北4号走滑断裂带变形特征及有利区评价

doi:10.7657/XJPG20230201

摘要/Abstract

摘要：

顺北4号走滑断裂带位于塔里木盆地顺托果勒低隆起，向北延伸至沙雅隆起，具有埋藏深，平面分段、纵向分层、多期活动、结构复杂等特征。通过对顺北4号走滑断裂带高品质三维地震资料解释，开展了断裂带分层、分段、分期、活动性和有利区评价。结果表明，顺北4号走滑断裂带在古生界具有4层结构，大致以中奥陶统顶界面为界，其上发育雁列式断层，其下发育高陡走滑断层；走滑断裂带具有明显的分段特征，按走向可分为北段、中段和南段，整体具有南压北张的特征；走滑断裂带在古生界先后经历了加里东运动中期Ⅰ幕、加里东运动中期Ⅲ幕、加里东运动晚期和海西运动期4期活动；通过对影响顺北地区油气富集成藏的主控因素通源性、储集体规模和晚期调整性的叠加，对顺北4号走滑断裂带进行有利区评价，得到多个有利区，并在实钻中得到验证。

关键词: 塔里木盆地, 顺北地区, 顺北4号走滑断裂带, 缝洞型油气藏, 断裂带分层, 断裂带分段, 变形特征, 有利区评价

Abstract:

The Shunbei No. 4 strike-slip fault zone which is located in the Shuntuoguole low uplift of the Tarim basin and extends northward to the Shaya uplift is characterized by deep burial，horizontal segmentation，vertical stratification，multi-stage activities，and complex structure. Through the interpretation of high-quality 3D seismic data from the Shunbei No. 4 strike-slip fault zone，the stratification，segmentation，staging，activity and favorable area evaluation of the fault zone were carried out. The results show that the Shunbei No. 4 strike-slip fault zone has a 4-layer structure in the Paleozoic，roughly bounded by the top of the Middle Ordovician，above which echelon faults are found and below which high-steep strike-slip faults are developed. The strike-slip fault zone is visibly segmented into the northern segment，the middle segment，and the southern segment according to the strike，showing an overall characteristic of compressed in south and extended in north. In the Paleozoic，the strike-slip fault zone successively experienced four periods of activity，namely，EpisodeⅠof the middle Caledonian，Episode Ⅲ of the middle Caledonian，late Caledonian，and Hercynian. By combining the main controlling factors (e.g. source-reservoir connectivity，reservoir size，and late adjustment) for hydrocarbon enrichment and accumulation in the Shunbei area，the favorable areas in the Shunbei No. 4 strike-slip fault zone were evaluated. Multiple favorable areas have been identified and then verified by actual drilling.

Key words: Tarim basin, Shunbei area, Shunbei No. 4 strike-slip fault zone, fractured-vuggy reservoir, fault stratification, fault segmentation, deformation characteristic, favorable area evaluation

中图分类号:

TE121.2

李海英, 韩俊, 陈平, 李媛, 卜旭强. 塔里木盆地顺北4号走滑断裂带变形特征及有利区评价[J]. 新疆石油地质, 2023, 44(2): 127-135.

LI Haiying, HAN Jun, CHEN Ping, LI Yuan, BU Xuqiang. Deformation and Favorable Area Evaluation of Shunbei No.4 Strike-Slip Fault Zone in Tarim Basin[J]. Xinjiang Petroleum Geology, 2023, 44(2): 127-135.

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