Inversion Tectonics And Controlling Reservoir Mechanism Of The Middle Zone Of Hai Ta Basin

Abstract:Inversion tectonics has been a significant conception in recent years (80's in 20th century). It is called as"inversion tectonics"in English literature. Geometry, kinematics and kinetics of inversion tectonics affect the basin's formation and evolvement. And its affection of oil and gas accumulation, migration, accumulation into reservoir has been an important part of oil and gas bearing basin research. Because it stand for the alter of regional stress field, so its time and space distribution regulation also has an important sense for analyze kinetics background of oil and gas bearing basin. The research of inversion tectonics has been one of a popular interest theme in oil geology republic,and gradually being high opinion to home and abroad scholar.The middle zone of Hailaer-Tamuchage basin is an important oil and gas bearing basin.The sorts and styles of inversion tectonics which developed in basin is very abundant. Along with the exploration and development of oil and gas, oil geologists realize that inversion tectonics hold the balance of formation of reservoir (especially the reservoir in Damoguaihe group second passage) in this zone. While,we don't have enough cognizance about its geometry character, distributing, evolvement, formation mechanism and relationship with reservoir. In this article inversion tectonics in this zone have been studied all round, and I got some ideas that the middle zone of Hailaer-Tamuchage basin had developed three large types and eight small types of inversion tectonics, they are fault, fold, hybrid inversion tectonics. From entire basin, later stage pressure torsion stress field have an utmost important effect to the formation of inversion tectonics. While, some degree of slipping have an important effect to evolvement of inversion tectonics. In this article I use inversion tectonics researching methods to elemental definite quantity collate and stipulate inversion tectonics in this zone, and combined with other elements like sediment feature,the development of fault feature,reservoir and top seal feature to multidisciplinary analysis the formation of the oil/gas of the inversion tectonics in this zone. Then take a conclusion that,the key weather inversion tectonics in this zone have oil/gas or not is the deformation mechanism of inversion fault in top seal rock. Shear type of clay smear action plays an important role in vertical dredge oil/gas of the inverted fault. This article use SSF to quantify this relationship. And this article also sums up the mechanism of inversion tectonics oil/gas reservoir formation the middle zone of Hai Ta basin. Study results indicate that quite member of inversion tectonics in Ber sag, Tanan sag,and Wuerxun sag penetrate clay smear action of the top seal rock. In these dredge actions, inversion fault in Tanan sag is the best and then developed a lot of secondary oil/gas reservoir. While, south Ber sag is very bad, secondary oil/gas pool in Damoguaihe groupe second passage is not develop basically.