The Finely Reservoir Description Of P Ⅰ 1-3 In The Center Of The 7th Area Of Xingshugang Oilfield

After more then forty years'development, most oil fields in Changyuan of Daqing Region have entered the stage of high water cut; the subsurface sandstones have had a high degree of reservoir recovery, and the distribution of oil and water has changed a lot. But at the same time, there still have some part or corner with a sub-high satuation of oil or haven't developed in the reservoir which is made up of fluvial sands maily, it is maily caused by the inhomogeneity of the reservoir. As the distribution of the remaining oil is become more and more complex, and without understanding the potentail clearly in the condtion of nowdays's technique, it is become more and more difficult to get it. As a result, our essential task is to descripe the inhomogeneity of the reservoir. There is a guiding intention to use the redundant dynamical and quiescent data suppled by dense well pattern of old oil field in deep developed period, in order to subdivide and correlate the facies units, and descripe the depositional micro-facies and the inhomogeneity of the reservoir, or to predict the sand bodies's distribute feature and its continuity, of course, the upper work should be conbined analyzing the hierarchy interface and the sedimentary process of the curves.In the object area, the mainly oil layer is Pâ… 1-3, and the main types of sand bodies is distributary channel in distributary plain and inner antrior in delta. Guding by the deposital theory of fluvial and delta, and using the latest deposital theory and knowledge, adding the outcome of the curves, we can subdivide the reservior unit vertically and indetify the deposital micro-facies horizontally. The next step is dissect the sand bodies's geomeitricshape, its trixial distribute character and its inhomogeneity. So there is a good base to analysis the distribution of the remaining oil in different flow unit.The research object in this paper is the 7th district in Xingshugang oil field which is layed in the south of Changyuan. Guiding by the high resolution sequence stratigraphy, and colligate the geology and curve data, I correlate the target layer. Then an electrofacies model established for this area by using the core data sufficiently. And considering the area depositail, the facies of the wells in this district are defined. The following work is define the depositonal micro-facies in sand unit, analysis its continuity and trend underground, and research its inhomogeneity in and between picks, so we can find out the vertical rhythm of the sand unit and the interbed's distribute model and it continuity between wells.