济阳坳陷第三系隐蔽油气藏勘探理论与实践

doi:10.11743/ogg20060603

Abstract

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

CLC Number:

TE112.322

Zhang Shanwen. Exploration theory and practice of the Tertiary subtle reservoirs in Jiyang depression[J]. Oil & Gas Geology, 2006, 27(6): 731-740,761.

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Exploration theory and practice of the Tertiary subtle reservoirs in Jiyang depression

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