Study On The Heterogeneity And Architecture Of Fuyu Formation In Chaonan 45 Block

Chao yanggou oilfield has entered the stage of high water and high production, but there are still a lot of remaining oil occurs in underground hasn’t been produced. As is the distribution rule of remaining oil was diversity, highly fragmented and relatively concentrated,the distribution of remaining oil in different areas and environment are not the same. How to carry on the research of reservoir heterogeneity and channel sandbody internal structure, has a direct impact on the exploition of remaining oil.The paper based on the sequence stratigraphy, reservoir sedimentology, petroleum geology and other related theory as the instruction, on the basis of making full use of core and logging data. Using methods of sequence stratigraphic fine correlation, such as characteristic layers, region closed skeleton profile, and approximation control, in order to establish a single-sand body sequence stratigraphic framework of three well area in the south of chao yanggou oilfield, 45 block. Fuyu oil layer is divided into three formations, seventeen small layers, forty-six sedimentary time units. Through the detailed description and analysis of the three coring wells, the delta distributary plain and delta front subfacies has been identified in this area. We have established the logging microfacies model in three well area. At the same time, we draw a total of 138 sedimentary microfacies maps, giving a meticulous description of single-sand body types and the change before or after encrypt. Aimed at features of sedimentary microfacies have been unable to meet the needs of current development geology,this paper has carried on the reservoir heterogeneity and single-sand body internal structure.Using a variety of methods to extract thin interbedded configuration parameters, Set up key time unit point bar sand-body internal structure models, carrying on the research of single sand-body internal structure and reservoir heterogeneity in order to analysis the effect of oil distribution. For exploration of remaining oil and improving recovery ratio provides a strong guarantee.