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THE CENOZOIC STRUCTURAL TRANSITION AND ITS SIGNIFICANCE FOR PETROLEUM ACCUMULATION IN DONGYING SAG,SHANDONG

Bin Xia, Cas Key

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Abstract

Dongying sag is a secondary structure unit of Jiyang depression, its current structural framework could be regarded as two expanding fault-fold systems controlled by Chennan listric fault zone and Lijin listric fault zone respectively, with each system consisting of four fault-anticline belts. Their evolution history could be divided into three stages as NNE-SSW extension, NW-SE extension and NNE dextral-slipping. This mechanism greatly influenced the process of hydrocarbon generation, migration and accumulation. As a result, structural traps are the most import hydrocarbon preservation units and constitute most of the reservoirs located along the fault-anticline belts.

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What this paper is about

Dongying sag is a secondary structure unit of Jiyang depression, its current structural framework could be regarded as two expanding fault-fold systems controlled by Chennan listric fault zone and Lijin listric fault zone respectively, with each system consisting of four fault-anticline belts. Their evolution history could be divided into three stages as NNE-SSW extension, NW-SE extension and NNE dextral-slipping. This mechanism greatly influenced the process of hydrocarbon generation, migration and accumulation. As a result, structural traps are the most import hydrocarbon preservation units and constitute most of the reservoirs located along the fault-anticline belts.

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Available abstract

Dongying sag is a secondary structure unit of Jiyang depression, its current structural framework could be regarded as two expanding fault-fold systems controlled by Chennan listric fault zone and Lijin listric fault zone respectively, with each system consisting of four fault-anticline belts. Their evolution history could be divided into three stages as NNE-SSW extension, NW-SE extension and NNE dextral-slipping. This mechanism greatly influenced the process of hydrocarbon generation, migration and accumulation. As a result, structural traps are the most import hydrocarbon preservation units and constitute most of the reservoirs located along the fault-anticline belts.

Key concepts: Anticline, Geology, Fault (geology), Cenozoic, Geochemistry, Petrology, Sinistral and dextral, Geomorphology

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