The Reservoir Architecture And Residual Oil Distribution Study Of Zhong38Block In Fuyu Oilfield

In recent years, a pair of high oil phase (high water content, high degree of recovery) become the trend of China’s most fields, but there are a considerable number of the remaining oil in different forms, different size distributed in the long-term reservoir after water flooding. The remaining oil overall dispersion of the distribution of local concentration is due to reservoir architecture (point bar lateral accretion shale) controls the underground fluid flow, and therefore urgent need for underground reservoir architecture and control the distribution of the remaining oil focus on anatomical models and research.On the basis of domestic and abroad research and technical literature and results of study, this article was according to the study of Yangdachengzi reservoir of in Zhong38area of Jilin oil field. To the reservoir geology and development features of Jilin Oil Fi-eld, this paper utilizes a series of modern oil reservoir description technologies and me-thods, which are comprehensive geological analysis technology and other modern tech-nology and methods of reservoir description,on the basis of comprehensive analysis of the geological, well logging and oil reservoir rocks to analyze testing, resolution sequ-ence stratigraphy, such subjects which are the petroleum geology, modern sedimentlo-gy,sedimentology,geological statistics,reservoir geology, oilfield development geology, stratigraphy as a theoretical guide on the means of computer technology.It has a resear-ch on reservoir architecture of meandering river reservoir in Jilin Area, and summarized a serious of methods to analyze reservoir architecture of subaqueous distributary chan-nel and meandering river. The main achievement of this study is:(1) Based on the application of sequence stratigraphy theory of cycle contrast and graded control, to study the184Wells region partition and contrast of layer, will study purpose layer segment subdivided into6sand groups and15small layers, and it is higher for northeast to southwest in the study area..(2) By means of analyzing sedimentary background, heavy mineral analysis, to determine the source direction in the study area, mainly from the southwest direction. In determining Yangdachengzi meandering river reservoir is the basis of the depositional environment of the study area Yangdachengzi reservoir in sedimentary facies characteristics were studied in detail, carved out of bed, embankments, river diffuse sedimentary facies and further subdivided the beach side, natural levee, river retention, crevasse splay, overbank sand, floodplain and river swamps and river diffuse lake sedimentary microfacies. (3) The reservoir are studied on the basis of high resolution sequence stratigraphic framework for research, after that,the architecture is divided into fith classes, the level3th and the3th above are the main research architecture.The level3th consist of sandwich, the forth formed layer between the layers.(4) Summarized a serious of methods to identify abandoned channel and determine the scale of single channel, Adopt cut overlapping models of channel and lithological interface recognition technology to identify single-channel sand scale, besides, adopt abandoned surface and the technology of wells to identify the point bar scale, to do the fine portraitand and characterization of reservoir architecture unit. Under the guidance of single-channel space combination mode.(5) Based on point bar sedimentary mechanism, and combine with point bar vertical sequences, type and composition lateral beddings of point bar, we built the transversal sedimentary model of single lateral bedding and the sedimented rock model of lateral accretion of point bar, and form inner interlayer and combined relation of point bar, Summarized a serious of methods to identify point bar and anatomic configuration in the point bar, based on abandoned channel shape, the tendency of sandstone thickness and point bar, using empirical formula conceptual model and the data of small well spacing to study lateral accretion body, the scale and occurrence of lateral accretion, then to guide on analyzing architecture in the point bar.(6) On the basis of identification and research on the reservoir configurations,we analysis the control function of the various classes of reservoir configuration for the remaining oil distribution, so as to indicate the direction of the fine exploration of oilfield.