Fine Reservoir Description Of Buried Hill Reservoir Of Archaean Group In An1-an97 Block

In order to fully exploit the potential of the old area and effectively promote the sustainable development of the old oilfield,this study is based on the detailed description of the old oil reservoirs.In An1-An97 pieces of archean erathem reservoir of buried hill reservoir,a comprehensive study of reservoir fracture development situation,to establish a reliable reservoir geological model,to provide guidance for remaining oil research,the remaining oil potential in oilfield.The detailed evaluation of reservoir reservoir,using modern seismic,logging and reservoir comprehensive analysis technology.Firstly,the characteristics of petrology in qianshan reservoir were analyzed to study the development of fractures.Then,using the logging data to explain the fracture,the reservoir physical parameters were studied,and the distribution chart of oil layer and effective thickness was established.In the end,the seismic data is used to describe the fracture of the reservoir in a precise and quantitative way,and the model of the buried hill fracture is established and the reserve calculation is carried out.An1-an97 block structure is located in the central qianshan belt of daming tun sag,which is separated from the northern limestone buried hill in the west and the dongshengbao buried hill in the south of daming tun.The main development of the three directions in an1-an97 buried hill,namely NE-NEE,NNW-NW and EW?The fractures are mainly tensional and shear fractures with high Angle fractures,especially high Angle fractures.The distribution of oil reservoirs in buried hill is mainly controlled by the structure and lithology,and is mainly concentrated in the regions with high structural and fault development,especially in the regions with high degree of fracture development.The development degree of fracture has a great relationship with lithology.The fractures are mainly developed in mixed granite,shallow rock and other dark mineral content,which is brittle.The buried hill reservoir of an1-an 97 is mainly composed of macroscopic fractures and microfractures and intercrystalline pores.Because of the filling effect of calcite,the macroscopic fracture is not developed,and the reservoir property of the buried hill is poor,which is low permeability and low permeability reservoir.The reservoir of buried hill reservoir is the main reservoir space with microcracks and micropores,and the macroscopic fracture system is seepage.By logging on the lithology and reservoir identification,physical explanation,finally complete Ann 1-97 pieces of buried hill fracture reservoir comprehensive evaluation,and then buried hill reservoir geological model is established,for the later buried hill reservoir of remaining oil potential in has played a guiding role.