Modeling Of Low-permeability Fractured Reservoirs In The Fuyu Oil Layer Of Daqing Xingshugang, Songliao Basin

There are a lot of small scale fractures in Fuyu reservoir Xingshugang,fracture is the main channel of the oil and gas seepage,which is also an important reservoir space,the reservoir fracture development directly affect the exploration and development of oil and gas.On the basis of making full use of current related research result,drilling data,seismic dataes,core observation,analysis results of imaging logging,production and testing dataes in this paper,with the guide of structural geology,petroleum geology,the theory of etroleum system,the research on the reservoir characteristics,reservoir fracture and fracture in logging identification of the Fuyu reservoir in Daqing Xingshugang.Then establish the matrix attribute model and fracture model.Obtain the following knowledge and achievements in this paper.The main rock types of the reservoir in Fuyu are the debris feldspar sandstone and feldspar sandstone.The reservoir space is dominated by the residual primary intergranular pore,and the second is the silicate particle dissolved pore.We can confirm the minimal values of effective reservoir with test oil point constraint method,the lower minimal value of porosity is 9.6%,and the minimal limit value of permeability is 0.13mD.With the well logging methods such as bilateral direction,well diameter and dip logging,the fracture can be identified effectively by combining with the core and imaging logging data.In order to evaluate the degree of fracture development in the high permeability of rocks,the permeability coefficient IK of the evaluation parameters is introduced,when IK>1,it shows that there are fractures in the reservior,the bigger the value,the more development of fractures.Established a three-dimensional geological model of Xingshugang,and structural model,sedimentary facies model and matrix attribute parameter model are established in turn.The fracture geometry model is established by using the method of discrete fracture network model with stochastic modeling method,then fracture parameter model can accurately describe the quantitative distribution of various fracture parameters in three dimensional space,so as to reveal the contribution to improve the performance of the reservoir.