Research On Reservoir Heterogeneity And Remaining Oil Distribution In Niu74 Fault Block Of Liaohe Oilfield

After years of exploration and development, Niu 74 fault block of Liaohe oilfield for the development of oil and gas resources less and less, moisture content is rising sharply. In order to further improve hydrocarbon recovery, to maintain continuous capacity, fault block reservoir characteristics have to be further careful study, and determine the remaining oil distribution, the optimal adjustment scheme.Through detailed study of the rock core, logging, oil test, physical properties, microscopic observations, first of all to the Niu 74 fault block reservoir heterogeneity has carried on the detailed study. Put forward the small layer upon layer, belongs to the weak -medium heterogeneity; Mainly in between the layers - strong heterogeneity degree; Plane heterogeneity is mainly controlled by sedimentary facies, the degree of heterogeneity is strong; Distribution of longitudinal level 3 relatively stable interlayer, average level of interlayer thickness 11.8?16 m, secondary compartment of the average thickness of 9.2-17 m, average level 3 interlayer thickness 6.8-19m;each small layer of interlining development is not stable. And then to predict remaining oil, to carry out the reservoir 3d geological modeling and reservoir numerical simulation research. Loyal to Niu 74 pieces, on the basis of the original data, according to the geological characteristics of the block, using Petrel software 3d geological model is established. Using the Eclipse software simulation of blocks in ten years development course,0.37% relative error fitting reserves, cumulative oil production relative error 0.47%, comprehensive water cut relative error is 7.04%, simulation accuracy meets the requirements. At the same time, according to the geological features of the current block, analyzed the current characteristics of remaining oil distribution, are analyzed in vertical and planar remaining reserves; Respectively analyzed the remaining oil distribution affected by reservoir heterogeneity, and put forward the current block type of remaining oil distribution are mainly imperfect injection-production, well pattern is out of control, sandstone type and the unidirectional water injection of edge effect. Six sets of the final design development plan for 40 years, development forecast, and ultimately determine 6 for the optimal solution.