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The Fine Sedimentary Microfacies, Heterogeneity And Remaining Oil Research In The Second Type Reservoirs Of North-Two-West

Posted on:2012-06-08Degree:MasterType:Thesis
Country:ChinaCandidate:Y H SunFull Text:PDF
GTID:2210330338455276Subject:Mineral prospecting and exploration
Abstract/Summary:PDF Full Text Request
Since the discovery of Da qing Oil Field, after long time of waterflood recovery, many oil exploitation areas especially the old areas have gone into high or ultra-high water reserve period, the phenomenon of oil-bearing sand bodies flooding is serious. After many times of water flood recovery, as the particular inner sedimentary characteristics of thick layer of river sand,the heterogeneity of the inner sand is more complicated, then the remaining oil distribution type is verifying which increase the difficulty of exploitation and potential tapping for the remaining oil, also it restrict the increase of oil recovery factor and total oil products.This master thesis put the north second area as the target area, put the main practising unit in sub-layers as the target research layer, make the oilfield development geology, high-resolution sequence stratigraphy,sedimentology, petroleum geology as the theory guide, make research on precise sedimentary micro-facies, reservoir heterogeneity and remaining oil issues.The layer section of the subject research is a complicated series of composition channel sand body, the sand formation process is complicated, so after completely knowing the geology basis of research area, under the guide of high-resolution sequence stratigraphy, we make careful and precise thin layer division and comparison on all the wells of the research area. Through detailed observation and description of ored well, making rock-electric contrast combined with logging curve, then establish the log phase mode In the research area. On the base of the above work, we make research on microfacies in the whole area, and finished 10 sedimentation time unit surface microfacies charts. To research on the heterogeneity of inner reservoir, we make use of the degree of porosity that extracted, range and other geologic parameters, adopt the method of combination of phase-controlled and non phase-controlled. We identify four distribution patterns for remaining oil by study of the remaining oil distribution on the basis of sedimentation microfacies charts by use of the water logging data of reservoir.
Keywords/Search Tags:remaining oil, Heterogeneity, Sedimentary microfacies, waterflooding hierarchy
PDF Full Text Request
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