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Investigation Of The Character Of Reservoir Geology Evaluation For Taiyuan Formation In Shaanbei Region Daniudi Gas Field

Posted on:2016-07-27Degree:MasterType:Thesis
Country:ChinaCandidate:P LiFull Text:PDF
GTID:2180330461953358Subject:Mineral prospecting and exploration
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Daniudi gas field is located in the northern ordos basin vishan eastern section of Northern Slope, across the yulin city of shaanxi province and the ordos city of Inner Mongolia, this article mainly research taiyuan formation, upper palaeozoic sedimentan system and reservoir development characteristics, through the understanding of regional geological setting, tectonic evolution and evolution, sedimentary system and on the basis of conducting the strati graphic classification and correlation, establish the carboniferous taiyuan formation in daniudi gasfield. a sequence stratigraphic framework to determine local structural characteristics and formation thickness distribution, the overall formation flat, local formation is volatile, monoclinic development from south to north, nose-like uplifts only in local development.Through the analysis of the sedimentary facies marks and electric logging curve, determine the taiyuan group for the offshore facies to the land and sea. Through the analysis of the floor plan and section, found tai 2 section period of sandstone thickness and continuity is higher than tai 1 section, tai 2 section have limestone lagoon facies developed. while tai I section not development the phase. 2 pieces of sand body space exhibition layout, according tai 2 section sand is too thick concentrated in the central position in the study area, tai 1 section sand concentration in the lowest position in the stud) area. Taiyuan group is a layer 2 development sand body development mode to the top of the thin coal seam with thin mud stone layers, thick barrier sand body part development. Another model for the lower development of thick limestone, in upper tidal sand body and thin mud stone interbedding. Taiyuan group is 1 layer sand body development mode for the top coal seam, the lower of mud stone and sandstone interbed. Barrier bar of taiyuan group were in the southeast of the west to the distribution, along the direction of the barrier bar, tai 2 section of continuity of sand body is section 1 is better.Based on the analysis of reservoir lithologv and physical property data, determine the lithology. physical characteristics and pore structure characteristics of taiyuan group in the development of main coarse quartz sandstone, compositiona] maturity is high. Coarse throat, good separation. But by the late reservoir destructive diagenesis and reservoir sensitivity, poor reservoir property.Further combining with the characteristics of sedimentary facies, and the testing results, the standard of gas reservoir discriminant threshold parameters, comprehensive evaluation and classification of reservoir evaluation, classification of evaluation results have four types of the reservoir, the main favorable area is mainly located at the center of the body of the barrier bar.
Keywords/Search Tags:Shaanbei region, Daniudi gasfield, Sedimentary facies, Reservoir physical property, Reservoir evaluation
PDF Full Text Request
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