松辽盆地德惠凹陷局部构造成因与油气分布
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摘要
德惠凹陷区是松辽盆地东南隆起区重要油气勘探须域,然而由于该区构造断裂复杂,造成油藏类型与富集规律认识的困难,作者以数字地震资料的重新解释为基础,分析了中国东部中新生代区域构造应力场特征,在此基础上探讨了本区构造特征,德惠凹陷深层受控于张性断块构造,形成构造转换带,断块构造与滚动背斜等局部构造,其中构造转换带导致的长期隆起是形成基底岩性气藏与披覆构造油气藏的有利条件,晚期扭动构造的发育是西侧断凸带形成的主要原因,扭动背斜、压性断层下盘及次级正断层控制的滑陷背斜是该区次生断层-岩性油气藏形成的主要圈闭,德惠构造是早期正向构造转换带与后期扭动背斜的叠合部位,应是油气最为富集部位。
Dehui sag is an important oil-gas feild in south-east belt of Songliao basin. This paper deals with the structural characteristic and structural history by analysing area sesimic section. The local structures located in two structural belts are west blocklift belt and midmole-track in Dehui sag. The latter is a transferred zone which was formated by extensional fault, consequently it may result in traps of different structural styles, and gather oil-gas. The blocklift belt is a wrench fault belt, so the main style of the trap is positive flower structure. They gathered fault-lithologic secondary deposit in shallow layer.
Dehui sag is an important oil-gas feild in south-east belt of Songliao basin. This paper deals with the structural characteristic and structural history by analysing area sesimic section. The local structures located in two structural belts are west blocklift belt and midmole-track in Dehui sag. The latter is a transferred zone which was formated by extensional fault, consequently it may result in traps of different structural styles, and gather oil-gas. The blocklift belt is a wrench fault belt, so the main style of the trap is positive flower structure. They gathered fault-lithologic secondary deposit in shallow layer.
引文
1 Harding T P, Lowell J D. Structural styles. Their plate-tectonic habitate, and hydrocarbon trap in petroleum provinces, AAPG, 1979,63(7) :1016～1058
2 Morley C K, Nelson R A, Patton T L, et al. Transfer zones in the east african rift system and their relevance to hydrocarbon exploration in rifts, AAPG, 1991, 75(8) :1234～1253
3 Harding T P. Idetification of wrench faults using subsurface structure date: creteria and pitfalls, AAPG. 1990, 74(4) :1590～1609．
4 钟大赉.深层构造控制浅层构造的讨论.第二届全国构造地质论文集.第1集.北京:地质出版社,1981:234～246
2 Morley C K, Nelson R A, Patton T L, et al. Transfer zones in the east african rift system and their relevance to hydrocarbon exploration in rifts, AAPG, 1991, 75(8) :1234～1253
3 Harding T P. Idetification of wrench faults using subsurface structure date: creteria and pitfalls, AAPG. 1990, 74(4) :1590～1609．
4 钟大赉.深层构造控制浅层构造的讨论.第二届全国构造地质论文集.第1集.北京:地质出版社,1981:234～246
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