Reservoir Characteristics And Geological Modeling Of Huanglong Formation Of Shuangjiaba Area In Northeast Chongqing Area

There are diversed views about sedimentary facies of Huanglong Formation. Therefore, a systematic and comprehensive study auout Carboniferous of Huanglong Formation at Shuangjiaba area requires to be carried out, summarises a sedimentary facies model and classification criteria suitable for the situation of exploration development in this area and could be generally accepted.Through the study of Diagenetic mechanism, Epidiagenesis and Porosity evolution in this area Establish the basis of geological theory for deepening exploration development of the Carboniferous at Shuangjiaba area. On the basis of understand the Effective reservoir thickness, Porosity and Plane the distribution of the energy storage storage coefficient, Combined with the existing research results about structure, and raised the target block ultimately, to establish the basis for deepening exploration development of the Carboniferous at Shuangjiaba area. In this paper, the theme of Chongqing northeastern shuangjiaba area Huanglong Formation Reservoir characteristics and geological modeling,depth study the geological background Sedimentary facies characteristics, reservoir characteristics and Reservoir Geology Model of Huanglong Formation in shuangjiaba areas of great significance as follows Some Understandings.(1)The Carboniferous of Huanglong Formation at Shuangjiaba area is divided into two main sedimentary system:sabkha and gulf shelf. On the basis of depth analysis the different sedimentary model viewpoint to Carried out a meticulous study about detailed sedimentary facies, subfacies and microfacies and evolution.Established sedimentary facies mode of Huanglong Formation in shuangjiaba areas. (2) Establishment stratigraphic isopach map the each section of Huanglong Formation, Isoline map of grain limestone,Contour map of dolomite and Contour map of karst breccia. On this basis, combined with regional tectonic setting conditions,establishment the planar distribution map of Sedimentary microfacie of three section Huanglong Formation.In-depth discussion characteristics of the various lithologic different sedimentary facies about geometric shape, plane distribution,evolution and Its relationship between reservoir Development.(3) The reservoir of the study area is mainly low porosity and low permeability reservoirs, the main reservoir rock is dolomite,.Reservoir space is dissolved pores and micro-cracks. Divided the diagenetic facies types of study area and analyzed law of the plane distribution about Diagenetic facies(4) Integrated use of deterministic modeling and stochastic modeling, established Three-dimensional structural model and sedimentary microfacies model of the study area Advantage of reservoir facies predominantly EW-NS distribution on the plane,horizontal continuous development and reservoir plane the connectivity well.(5) The model produced by the application of facies Control sequence Gaussian method, established three-dimensional attribute model of the study area. Carboniferous of Huanglong Formation at Shuangjiaba area the average porosity3%and average permeability of6×10-3μm2; average water saturation of19%; The physical properties of good areas are mainly concentrated in the QiLi7wells～QiLi42wells～QiLi47well area; The longitudinal direction of the C2hl2-2and C2hl2-4small layer have a good physical properties. Its reliability is confirmed by model checking And calculate the work area OOIP65.06×108m3, the average reserve abundance3.75×108m3/km2.