The Structural Characteristics Of Fumin Area And Advantageous Exploration Target

Gaoyou Sag complex fault zones are well-developed,Fumin area is located in the middle of Gaoyou Sag,mainly under control of Zhenwu,Hanliu fault.Overall,Fumin area inherites Gaoyou sag characteristics of south-terrace,central-furrow and northern slope zone.Due to the fault zone Dainan Formation eroded,this paper studies according to the central-furrow and northern slope zone respectively.In this paper,using structural geology,seismic exploration theory as the guiding principle,combined with literature data,seismic data,logging data,drilling data,geological data,etc.,to complete the fine structure interpretation and seismic inversion work.When combing structural interpretation process,a variety of techniques such as cross-sectional interpretation of a variety of methods,time-slicing technology level,coherence technology,etc.are generalized with examples.To provide supports for finding favorable traps,this paper implements seismic inversion reservoir prediction research,details the operation flow of constrained sparse pulse inversion,and depicts the sand body model of southern block in Fumin area.Basing on the structural interpretation,this paper studies the structural geometry features of the Zhen(2)-1 fault,Hanliu fault,major secondary faults F1,F2,F3 and northern slope zone,and analyzes structural styles.The fault plane combination style includes parallel,oblique style,and chessboard combinations.Sectional combination style includes graben and horst,"Y" shape and stepped fault combinations.Integrating structure and reservoir studies,this paper analyzes the main oil and gas distribution factors such as distribution of source rocks,sedimentary facies and reservoir-cap combination,the role of fault controlling possession,evaluates favorable trap,considers that the southern of Fumin area and northern slope exploration block area have good potential as a favorable area with a focus on expansion.