济阳坳陷第三系隐蔽油气藏勘探理论与实践

doi:10.11743/ogg20060603

摘要/Abstract

摘要：

作为典型的陆相断陷盆地,济阳坳陷经受了复杂的构造活动和沉积作用,隐蔽油气藏十分发育。通过隐蔽油气藏形成机制的研究,提出了三个重要的理论认识:其一,断裂主导的盆地构造活动形成的陡坡和缓坡断阶、盆内和凸缘坡折控制了储集岩的形成与分布,成为隐蔽圈闭目标区带优选的基础,亦即“断坡控砂”;其二,网毯式、“T”型、阶梯型、裂隙型等输导类型在盆地特定的时空域发育和产生作用,构成了复杂的油气输导网络体系,成为隐蔽油气藏勘探方向评价的条件,亦即“复式输导”;其三,相(接受条件)、势(动力条件)存在的耦合关系,决定了油气成藏的基本条件和不同特点,成为勘探目标评价的关键,亦即“相势控藏”。这三个观点构成了陆相断陷盆地隐蔽油气藏勘探思维的核心,有力地指导了“十五”期间济阳坳陷的隐蔽油气藏勘探。

关键词: 断坡, 隐蔽油气藏, 油气勘探, 陆相断陷盆地, 济阳坳陷

Abstract:

Jiyang Depression,a typical terrestrial rifted basin experienced complicated tectonism and sedimentation,contains many well-developed subtle reservoirs.Research on the forming mechanism of the subtle reservoirs reveals three important theoretical understandings.First,steep and slow slope fault-steps and innerand outer-basin slope-breaks shaped during fault-dominated tectonism control the formation and distribution of reservoir rocks(also known as 'faulting-slope-controlled sandstone'),making the place an ideal area for exploration of subtle reservoirs.Secondly,different hydrocarbon conducting paths with the shape of meshwork-carpet,capi-tal letter 'T',ladder,and fractures,develop and operate inside the particular time-space tract in the basin,constituting a complex hydrocarbon transportation system(also known as 'compound transportation')and providing information for the evaluation of exploration direction of subtle reservoirs.Finally,the coupling relation between facies(receiving condition)and liquid potential(driving condition)determines reservoiring conditions and charateristics(also know as 'facies-potential-controlled reservoirs').These understandings constitute the kernel idea of subtle reservoir exploration and promote effectively the petroleum exploration in Jiyang depression during the Tenth Five-Year Plan.

Key words: terrestrial rifted-basin, subtle reservoir, fault slope, carrier system, reservoring mechanism, oil exploration, Jiyang depression

中图分类号:

TE112.322

张善文. 济阳坳陷第三系隐蔽油气藏勘探理论与实践[J]. 石油与天然气地质, 2006, 27(6): 731-740,761. doi: 10.11743/ogg20060603 Zhang Shanwen. Exploration theory and practice of the Tertiary subtle reservoirs in Jiyang depression[J]. Oil & Gas Geology, 2006, 27(6): 731-740,761. doi: 10.11743/ogg20060603

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