Description Of Single Sand Body And Potential Tapping Of Remaining Oil Of Sa Ⅲ Group In The North Of Labei

Lamadian Oilfield North block of new wells drilled after the block in class II reservoirs SA III group, as in Lamadian Oilfield potential succeeding strata, the polymer flooding, the recent increase oil production and sustainable in the long term stability is of great significance.In drilling and completion of reservoir fine research is needed in order to ensure that the block to polymer flooding, mining, understand sedimentary interface, all kinds of sand body distribution characteristics and different types of sand body of use condition, the reservoir description results in objective zone in extra high water cut stage of polymer flooding play important guiding role in the fine adjustment, to improve block recovery rate to have the vital significance.The principle of high resolution sequence stratigraphy to stratigraphic sequence interface complete division, determine the sequence interface division of sedimentary units, SA III reservoir group was subdivided into five small six single channel unit three sandstone group.Based on the analysis of core facies, log facies model of 14 phases of 2 sub phases of the delta front sub facies and delta front sub facies are determined. The cause of the sedimentary environment analysis and identification of genetic single sand body boundary pattern recognition and the sedimentary unit of single sand body boundary, the 11 kinds of single sand body facies belt prediction method of boundary, clear the purpose of the study area layer6 genetic unit models for the distribution of sand bodies. Through the research area various sedimentary units with low amplitude structure identification, combination of static and dynamic in the study area of the sedimentary units of different types of sand body use research status, points out that the remaining oil distribution rule and the main influence factors. Further improve the sand body of the river and the formation of a single sand body boundary model identification method, so that the study area of the various sedimentary units of the identification of the boundaries of a single sand body more reliable.This study use flooded data, the analysis of the sedimentary units of different sedimentary microfacies in different water flooding level, combined with micro amplitude structure, basic well pattern and water injection profile and basic well pattern and injection production relationship, summed up the block extra high water cut stage of development the distribution of remaining oil. Through static and dynamic data comprehensive analysis,according to the different thickness of channel sand body, combined with injection production relation and characteristic of water flooding, and put forward the corresponding residual oil mining measures, for the purpose in the block layer of new wells are put into operation, effect analysis and post polymer flooding fine adjustment provides a reliable basis.