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川东北地区通南巴构造带裂缝储层的形成与天然气充注
引用本文:张元春,邹华耀,李平平,匡大庆.川东北地区通南巴构造带裂缝储层的形成与天然气充注[J].科技导报(北京),2010,28(15):53-57.
作者姓名:张元春  邹华耀  李平平  匡大庆
作者单位:中国石油大学(北京);油气资源与探测国家重点实验室,北京 102249
摘    要: 裂缝型气藏是川东北地区重要的勘探目标之一,但对裂缝储层的发育特征和气藏的充注历史研究相对薄弱。本文利用岩心和成像测井分析裂缝特征,并结合流体包裹体测试技术确定通南巴构造带裂缝型气藏天然气充注时间。研究结果表明:① 裂缝型储层主要分布在飞三段(T1f3)的鲕粒灰岩和嘉二段(T1j2)的砂屑灰岩中,以高角度缝和垂直缝为主;② 裂缝走向与邻近断裂走向一致,受中燕山运动以来大巴山构造北东—南西向推覆挤压作用,大致形成于晚侏罗世;③ 流体包裹体测温揭示天然气充注时间为晚侏罗世(160~148Ma);④ 裂缝发育时间与烃源岩生气高峰相匹配是控制通南巴构造带天然气充注时间的关键因素。

关 键 词:裂缝储层    天然气来源    充注历史    通南巴构造带

Fracture Development and Accumulation History of Fractured Reservoirs in Tongnanba Belt,Northeastern Sichuan Basin
ZHANG Yuanchun,ZOU Huayao,LI Pingping,KUANG Daqing.Fracture Development and Accumulation History of Fractured Reservoirs in Tongnanba Belt,Northeastern Sichuan Basin[J].Science & Technology Review,2010,28(15):53-57.
Authors:ZHANG Yuanchun  ZOU Huayao  LI Pingping  KUANG Daqing
Abstract:The fractured reservoirs are one of the most important prospecting targets in northeastern Sichuan Basin. However, the development features of fractures and the filling history of these fracture reservoirs were not well studied. This paper mainly analyzes the fracture characteristics by image logging and determines the charging time of gas reservoirs in Tongnanba structure belt by fluid inclusion measurements. The main conclusions can be summarized as follows. Firstly, the fractured reservoirs are mostly distributed in ooid limestone and grey doloarenite, respectively, in T1j2 and T1f3 formations, and dominate by high-angle or vertical fractures. Secondly, the trend of fractures is consistent with that of neighboring faults due to the northeast-southwest compression stress due to Daba Mountain structure and medium-late Yanshan Movement, which indicates that fractures might be formed in the era of late Jurassic. Thirdly, the gas charging time is about late Jurassic (160¡«148Ma) as confirmed by fluid inclusion measurements. Fourthly, it is the most important factor for the gas filling time that the development time of fractured formation matches with the gas-generating peak of the source rock in Tongnanba structure belt
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