The study area is located in Wenchang A sag of Zhu Ⅲ depression in Pearl River Mouth Basin,western South China Sea.In order to quantitatively evaluate the conductivity of each oil source fracture in Wenchang A sag of Zhu Ⅲ depression in Pearl River Mouth Basin,based on previous research results and combined with the exploration practice of Qionghai uplift in this area,three major factors controlling the conductivity of oil source fractures in this area were summarized:Oil source area,Extension area and Fault section attitude.A comprehensive evaluation method for the conductivity of oil source fractures was established.Through this method,the conductivity of 24 oil source fractures in Wenchang A sag was quantitatively calculated.The evaluation results show that the overall conductivity of Wenchang 8 area is strong,and there is still great potential near large-scale oil source fractures;the overall conductivity of Wenchang 9 and 11 areas is weak,and it is suggested to expand in the local deep layer in the later stage;the conductivity of oil source fractures in Wenchang 10 area varies the most,and the adjacent areas to the main oil source fractures are important directions for potential expansion.This understanding supports the efficient evaluation of medium-sized oil fields in Wenchang 9 area,promotes the discovery of medium-sized oil and gas fields in Shenhu uplift,clarifies the direction of mid-deep development in Wenchang 8 area,and lays an important foundation for breakthroughs in Wenchang A sag.This method not only plays an important role in accurately understanding the conductivity of each oil source fracture in the area,but also provides an important basis for area evaluation and decision-making deployment.
Pearl River Mouth BasinZhu Ⅲ depressionWenchang A sagoil source fractureconduction capacityquantitative evaluation
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