The Study Of Sedimentary Microfacies And Reservoir Heterogeneity Of Fuyang Formation In Sheng 382 Block Of Yushulin Oilfield

Sheng 382 block is the better block of the south of Yushulin oilfield, but here reservoir physical propertys are relatively good, so that water content of production wells in injection well row rise rapidly, the majority of wells are too early to see water or flooding, thus affect the development effectiveness. In order to improve understanding of reservoir geology and address the problems in development, carry out micro-facies sedimentary and reservoir heterogeneity research in Sheng 382 block.On the basis of comprehensive data collection and analysis of the study area, first of all, to establish the principles and methods of stratigraphic division and correlation, by choosing key wells, optimization curve, determine the sign characteristics, taking full advantage of drilling core data, development well logging data and development dynamic data; Under the regional sedimentary and geological background,comprehensive applying"cyclic correlation, hierarchical control, different facies, differential treatment to different sedimentary facies"to zone correlation and subdividing sedimentation unit in fluvio-delta sedimentary system, establish high-resolution sequence stratigraphic framework within the scope of regional. Through the rock coring wells characteristics, single-well profile phase analysis, combined with the regional sedimentary background, summarized the main sedimentary facies types and their characteristics of target area, determined River - Delta traction-flow current deposits in this area. By detailed observation and analysis of wildcat information, used sedimentary facies to calibrate log-phase and established log-phase model;according to log-phase mode to analyse log-phase, identified three-phase, six categories of sub-phase and 22 micro-phase in the study area in the end; through well-phase joint and planar phase, as well the distribution of sandy lay, summarized sedimentary facies evolution model and deposition laws of study area; through the analysis of laboratory data to build log interpretation model parameters, quantitative interpretation of reservoir parameters (porosity, permeability and oil saturation) and thus evaluate reservoir heterogeneity.Through heterogeneity study, clarified the heterogeneity within a single channel sand body. Based on the analysis of non-homogeneous nature, combined with the dynamic production data, further reveal the sedimentary facies and heterogeneity on the impact of residual oil distribution.