The Research On Water Flooded Layer And High-capacity Channel Recognition Of Peripheral Putaohua Oilfield

After many years of water-flooding development, some blocks or reservoirs of Peripheral Putaohua oilfield have been found with varying degrees of flooding phenomenon, has entered the early stages of flooding, which enlarge the difficulty of water/oil bed identify on the basis of difficulty in the high water-blocking layer, low resistivity reservoirs and oil-water layer. And the oil reservoir has both similar properties of the medium or high porosity and permeability with the old base areas, and the"three low"oil characteristics of periphery, so there are no successful flooding scientific achievements that can learn from.In this graduation design, the author firstly analyzed the geological condition of Peripheral Putaohua oilfield comprehensively, studied about the logging fundamental theory of IEL and HDIL in-depth, and summarized the affect regular pattern of mud invasion on electric property curve. Multivariate regression was used to establish the relationship of pentad log response value analog array specific resistance, sonic porosityΦs, microspheres Rxo, spherical focus RSFL, Rid , Rim, Rd and dgr. The average correlation coefficient of relations is 0.923, and the average relative error is 13.7%. After completing six well's calculation of curve of analog array, compare with result of testing oil and reflecting condition of analog array curve with water/oil bed, establish the identification plate of water/oil bed and water flooded layers, and preferably discriminated oil layer, primary oil-water layer and water flooded layers, distinguished 17 layers, accorded with 15 layers, the coincidence rate can attained 88.2%, the accuracy of verify is satisfied the need of production. There is direction to high efficiency development of this oil field and exploration criterion of the other area.In addition, in this graduation design, high-capacity channel was explored and researched, a unit include a certain injection well and pumping wells connected, focusing on analysis of the unit's dynamic and static information: First of all, the author analyzed dynamic data such as water content, water absorption profile, and confirmed the some reservoirs of the unit were likely to occurrence high-capacity channel; Secondly, the author analyzed the physical conditions of the presence of high-capacity channel by static data, and sorted physical conditions of the reservoir which can cause high-capacity channel. Research results provided a favorable basis for the establishment of mining programs of the other blocks of Peripheral Putaohua oilfield in the future, which has propagable sense in the actual production.