The Junggar Basin, One Hundred Springs Oil Field 100 31 Well Area The Permian Jackwood River Three Sections Of The Reservoir Cracks

The reservoir of Layer P₁j³ of Jiamuhe in Bai31 District of Baikouquan oil field of Junggar basin, its porosities are 2 18.8%, average porosities are 8.04%; its average permeability are 0.06×10^-3μm², In a word, the reservoir is a typically fractural and porositical reservoir with moderate porosities and lower permeability; As a new oil field, the problem of fracture has become a critical problem which affect high performance exploitation of reservoir.For the first time, the special integrated applications of multi-disciplines and new technologies are used to study the fracture, On the basis of abundant fine descriptions of core,the imaging and conventional logs,micro seismic record, the prediction data of the finite element numerical simulation of fracture in the reservoir of Layer P₁j³ of Jiamuhe are inter-testified to qualitatively and quantitatively determine the structure fracture of this area.Conclution as following:(1) Shearing fractures are the most in the reservoir of Layer P₁j³ of Jiamuhe, the extension fracture is the second. Most of fractures are filled with calcite, these idles fractures, if modificated acidate, can be turned into effective fractures.(2) The porosity of fractures which be count by the conventional logs on the basis of the porosity of fracture of core is 0.65 %.(3) The scale of most of fractures is small, its inclination angle varies between fourty degrees and seventy degrees.(4) There are six teams fractures in the reservoir of Layer P₁j³ of Jiamuhe, theirs orientation are the NE, NW, NWW, NEE, EW and SW.(5) The structure stress is the most important factor which affect the level of fractures, Except for the structure stress, the fractures are in control of the big KE^WU fault, the distance off the KE^WU fault is more near, the amount of fractures is more high.(6) The fractures whose orientation are the NWW, NEE and EW are the most efficient.(7) The fractures are formed during Haixi and Ximaiaya duration.During this period, the reservoir of Layer P₁j³ of Jiamuhe were be forced in the EW and WS orientation.