Fine Geologic Modeling Of Triassic Bottom Water Reservoir And Study Of Water Control Measure In The 1st Block Of Tahe Oilfield

Bottom water reservoir is the great difficulty reservoir in the process of oilfield development. This type reservoir has significant differences compared with home and abroad conventional reservoir in geological, engineering and recovery characteristics. Triassic lower oil formation of the 1st block of Tahe oilfield is the typical massive reservoir which has large bottom water but small oil top. Triassic lower oil formation of the 1st block of Tahe oilfield is a low amplitude anticline that its long axis is close to SW-NE trending. Sedimentary material source direction mainly comes from northeast direction. Sedimentary facies is braided delta-coastal shallow-lake facies. Reservoir lithology is grey, ironcored grey crude, medium, fine grained feldspathic lithic sandstone and debris-feldspar which partly contains conglomerate. Reservoir has strong heterogeneity and distributed barrier and interlayer. Permeability has large variation range. The water-body is active in the process of development. Water breakthrough speed is too fast. In this paper, we systematic exposite the effectively developed technology of the flaggy, interlayer and bottom water reservoir in development geology, reservoir geological model, the cause, type, thickness and distribution of interlayer, the sealing characteristics of faults, reservoir engineering, the present developed scheme and water control method.Useing the least squares support vector machine, the physical parameter of the reservoir is explained in the study. The porosity and permeability close to actual experiences is obtained. Using the physical parameter of well log interpretation and interlayer, we mainly consider the effect of bottom water. Based on above, we performed 3D fine geologic modeling. The interlayer of wells is identified. And the interlayer distribution combined with sedimentary facies features are evaluated. The water invasion models of triassic lower oil formation of the 1st block of Tahe oilfield are established though the geological model and numerical simulation of well. Collect and arrange the jahrlich development dynamical datas, we evaluate the reservoir from the production decline rule, reserves producing degree, recovery factor, water control of the late stage of development. Using numerical simulation of reservoir, we predict the residual oil distribution rule and water control factors in the present stage. The integrated water control method is established.The paper takes Triassic lower oil formation of the 1st block of Tahe oilfield as example,based on the geological characteristics of interlayer and bottom water development, to solve the present problem of water increased quickly, with computer technology, Petrel and Eclipse software, integrated geological, logging and reservoir engineering using reservoir evaluation integrated research ideas, combining static and dynamic, from qualitative to quantitative, formed a serious of research approach and technical methods of interlayer and large bottom water reservoir for the exploration and development of similar reservoir provides exploratory.