东营凹陷王家岗构造带孔店组构造特征及其控藏作用

doi:10.11743/ogg20130211

Abstract

Abstract:

The Kongdian Formation in Wangjiagang structural zone in Dongying depression is complex in structural characteristics,and its tectonic evolution process is still poorly understood.To solve these problems,various data including seismic,logging and core were integrated to analyze the structural characteristics of Kongdian Formation,summarize its regularity of formation and evolution,and reveal the control effect on hydrocarbon accumulation with rose diagram of faults,balanced cross section and fault-sealing analysis methods.The following results were obtained.Most faults were formed in the DongyingKongdian period.Owing to the differences of formation mechanisms,faults with different trends are different in timing and configurations.On plane view,the faults show configurations such as comb-like,parallel or echelon.While on sectional view,they show configurations such as step,"Y" shape or roof-like.Folded belts which were controlled by Tan-Lu fault zone and basement strike slip fault system have undergone three evolutionary stages including formation stage,intensification stage and finalization stage.During this period,the folded belts were cut by earlier or growth faults,resulting in moniliform fault-nose distribution.The structural zone controlled hydrocarbon pooling.It is the most favorable destination of hydrocarbon migration and has better physical properties of reservoir in the axial region than those in two wings.Fault sealing and carrier beds are the key factors controlling hydrocarbon migration and accumulation.The length of fault,the width of folded zone and reservoir physical property determine the plane distribution area of oil/gas,while the fault configuration and amplitude of fold zone jointly control the spatial distribution of oil/gas.

Key words: fault, fold zone, control on hydrocarbon accumulation, structural characteristics, Wangjiagang structural zone, Dongying Depression

CLC Number:

TE122.3

Song Guoqi, Li Jiyan, Jia Guanghua, Wang Dongxu. Structural characteristics and its control on hydrocarbon accumulation of the Kongdian Formation in the Wangjiagang structural zone,Dongying Depression[J]. Oil & Gas Geology, 2013, 34(2): 207-214.

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Structural characteristics and its control on hydrocarbon accumulation of the Kongdian Formation in the Wangjiagang structural zone,Dongying Depression

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