Xi Qu Oil Extraction Plant Zheng 30 Area Chang 6 Reservoir Description

The Reservoirs in this study is Chang6 Reservoir of Zheng 30 aera, located in the ZhiDan oilfield of ordos basin.which is characterized by the low porosity and permeability, discontinuous of sand, and strong heterogeneity. After waterflooding development for some time, many water wells is not up to the allocated injection, leading to the formation pressure maintain a low level. This ultimately affected the efficient development of blocks. Based on this, the delicate reservoir description for chang6 reservoir in Zheng 30 well area is carried out, to lay the foundation for efficient water-flooding development of the Chang6 reservoir.This study based on the detailed stratigraphic division, I truly builded the Isochronous stratigraphic framework of the study area; Comprehensive referencing to various sedimentary facies logo,I carry out the Sedimentary microfacies analysis from point-line-surface, Chang6 reservoir in the study area is thought to be Delta front deposition, and mainly developed Underwater distributary channel, Chanel mouth bar and Underwater distributary Bay; From the inside layer, layer and flat three aspectski analysis the reservoir heterogeneity, which is thought to be middle-strong heterogeneity; On the basis of the research on the reservoir characteristics, i carry out the comprehensive evaluation for the reservoir. and|, }, ~ class are distributed; Classification results showed: Chang61 reservoir physical property, net pay thickness and juncture are quite fine, comprehensive assessment result is |chass, Chang63 is classified as } class, Chang62 and Chang64 are classified as ~ class. Meanwhile I carried out reserve recalculation and established the fine 3D geological model of the reservoir, providing geological basis for the study of the numerical simulation and stratified water flood in the late period.