冀东南堡凹陷古近系东营组构造对扇三角洲的控制作用

doi:10.11743/ogg20080115

Abstract

Abstract:

Boundary fault features and deposition characteristics of the Dongying Formation support a division of the Nanpu depression into three structural units,namely the steep slope zone,the depressed zone,and the gentle slope zone.The analysis of drilling,log and seismic data points out that fan-deltaic depositional systems are mainly developed in the steep slope zone and are controlled by different paleo-structures and paleogeomorphology,thus showing clear disparity in grain size of reservoir rock and development scales.Based on these observations,the paper sums up three fan deltaic genetic models,including fault-platform,fault-terrace,and fault-scarp.They differ tremendously in reservoir capacity.The delta plain subfacies and fan delta front subfacies developed in the fault-platform setting and the fan delta front subfacies developed in fault-terrace setting are considered as the favourable facies belt for forming high quality reservoirs.

Key words: boundary fault, fan-delta, Dongying Formation, Nanpu Depression, Jidong oilfield

CLC Number:

TE121.2

Liu Yanli, Qiu Chunguang, Deng Hongwen, Li Ming. Control of the structure of the Paleogene Dongying Formation upon fan-delta deposition in the Nanpu Depression,Jidong oilfield[J]. Oil & Gas Geology, 2008, 29(1): 95-101.

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Control of the structure of the Paleogene Dongying Formation upon fan-delta deposition in the Nanpu Depression,Jidong oilfield

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