Research Of Burial Hill Oil Reservior In The West Of Damintun Depression

The research area is located in the west side of Damintun depression of Liaohe Basin.Dongsheng Fort, Jing'an Fort and Caotai buried have been found in the east side of the study area in 1980s,which have been put into development for many years.The Damintun depression is a circunferential fault cutting triangel-type depression,which belongs to Mesozoic-Cenozoic rift basin. Its development and evolution experienced three geological developed stages—crust uplifting,rifting and depression. The base lamina consists of Archean rocks and Proterozoiz dolomite. While the buried hill structure is mainly controlled by fault structure.The secondary depression structure units are North-East,concave and convex,nose-like anticlinal structural belt,which formed a goose-shaped arrangement,whereas,the west side of Damintun Jing'an Fort, situated in the zone of low buried hill of the west side of Jing'an fort fracture nose-like structure zone,has a close relationship with development history of regine structure.As the zone of low buried hill deeply lies hidden in the earth,there were rare study of it before.The current study is mainly restricted to high buried hill zone,which has increased the difficult of research. Directed by the basic theory of structure geology,reservoir geology and oil and gas accumulation geogoly, as well as combining with earthquake and logging data, the geogoly backgound of the research area and the reservior characteristics of the buried hill have been studied in detail in this paper.Through the detailed interpretation of seiemic data,this paper is aimed to identify the structure form of the potential top surface of the buried hill,to study the structure evolution of the low buried hill zone in the west side of Jing'an Fort,and its form of the closed circle and the eveolution regular pattern.The paper also apply the comprehensive geoglogical study means to search out the composition of buried hill formation,rock features,storage space and distribution law,and then to study the causa of cracks and development law.Based on above,the evaluation to reserior area is that fractures development level and resrvior development to the east are well done,however,to the west it become worse.