温吉桑-温南隐蔽油气藏形成条件及勘探技术
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摘要
温吉桑-温南地区具备发育隐蔽油气藏的基本条件。该区历经燕山、喜山运动,形成了一系列成排成带展布的断背斜、断鼻等圈闭,控制了油气的分布。受断层控制,呈东西走向的局部构造与南北展布的低位体系域辫状河三角洲砂体叠置,控制局部构造的"深断浅不断"的断裂,沟通了水西沟群烃源岩与其上部三间房组和七克台组的储盖组合,是油气运移的良好通道。油源、构造、储盖组合与油源断层"四位一体",在构造东西两翼形成了侧缘上倾尖灭岩性油藏。从区带的成藏背景来看,复杂断块油气藏、岩性油气藏是本区主攻目标,其次为低阻油气藏、低幅度构造油气藏和裂缝性油气藏。温5南断块等一系列复杂断块油气藏及温西6东块岩性油藏的发现,充分显示了隐蔽油气藏良好的滚动勘探前景。开展在高分辨层序地层学指导下的储层横向预测,以人机工作站为平台的全三维地震目标处理、解释及断层封堵性研究是进一步挖掘本区主要隐蔽油气藏类型的关键技术;老井复查与成藏条件分析综合研究相结合是深化认识低阻油气藏的重要手段。
The geologic conditions in Wenjisang - Wennan region meet the basic requirement of subtle reservoir generation. From reservoir generation setting, it is inferred that complex fault - block reservoirs and lithologic reservoirs are the main target of this region, followed by low resistivity reservoirs, low amplitude structural reservoirs and fractured reservoirs. The key techniques used in the exploration of subtle reservoirs in this region include reservoir lateral prediction guided by high - resolution sequence stratigraphy, full three - dimensional seismic process and interpretation and the study of seal off of fault. Whereas an important strategy to further understand the low resistivity reservoirs is to check existent wells integrated with comprehensive study of reservoir generation conditions.
The geologic conditions in Wenjisang - Wennan region meet the basic requirement of subtle reservoir generation. From reservoir generation setting, it is inferred that complex fault - block reservoirs and lithologic reservoirs are the main target of this region, followed by low resistivity reservoirs, low amplitude structural reservoirs and fractured reservoirs. The key techniques used in the exploration of subtle reservoirs in this region include reservoir lateral prediction guided by high - resolution sequence stratigraphy, full three - dimensional seismic process and interpretation and the study of seal off of fault. Whereas an important strategy to further understand the low resistivity reservoirs is to check existent wells integrated with comprehensive study of reservoir generation conditions.
引文
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[2] 沈守文,彭大钧,等.试论隐蔽油气藏的分类及勘探思路.石油学报,2000(1) :16-21．
[3] 罗权生.台北凹陷反转构造特征与油气关系浅析.石油勘探与开发,1997(5) :25-26．
[4] 潘元林,孔凡仙,等.中国隐蔽油气藏.北京:地质出版社,1998．
[5] 杨振峰,张志业.泌阳南凹陷隐蔽油气藏形成条件及勘探方法.小型油气田,1997(3) :4-8．
[6] 程世铭,等.东辛复杂断块油藏.北京:石油工业出版社,1991．
[7] 陈荣林.论塔里木盆地非背斜油气藏条件.北京:石油实验地质,2000(3) :215．
[8] 刘震,吴因业.层序地层框架与油气勘探.北京:石油工业出版社,1999:189．
[9] 吴涛,赵文智.吐哈盆地煤系油气田形成和分布.北京:石油工业出版社,1997．
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