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Reservoir Evaluation Of Chang6Oil Reservoir Group In Tie Biancheng Region In Ordos Basin

Posted on:2013-06-15Degree:MasterType:Thesis
Country:ChinaCandidate:Y LiFull Text:PDF
GTID:2230330395478330Subject:Oil and gas field development project
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Tie Biancheng area lies in the Wuqi territory in Shaanxi Province, which is in the case ofloess landforms, constructed in the west of the Ordos sedimentary basins in northern Shaanxislope. The author does systematical and detailed research on Chang6,which is the mostpirmary oil-bearing series in Yanchang formation in Tirassic period.On the basis of Sequence stratigraphy, sedimentary petrology and logging geology,combed with irch static data from logging, core analysis and mud logging, the author providedcorrelation of strata and small layer partition, which divided Chang6oil reservoir group into4oil-beairng seires. According to vairous sedimentary facies logo, analyzed that study areabelongs to delta facies depositional environment. The intrafacies is delta plain and delta frontdeposition. The sedimentary microfacies are distirbutary and distributary interchannel on theland, underwater distributary channel and interdistirbutary bay underwater. On that basis,combined with the provenance analysis, the thesis studied the development and distribution ofsedimentary microfacies. At the same time, Combined with the large number of assayingmateiral and conventional petrophysical properties data, the author studied the characteristicsof reservoir Through the “relationship among the four characters “research, established a setof interpretation models of reservoir’s parameters and the lfoor level of reservoir parameterwhich is suitable for study area, do the second explanation for logging data, and then doresearch on the distirbution of the sand body and physical properties.Systematic study to obtain the following understanding: According to the sedimentarycycle, Chang6oil reservoir in Tie Biancheng areas can be divided to Chang61、Chang62andChang63; formed in the development of the northeast provenance role delta front subfacies;favorable sedimentary facies birng a relatively developed area of the physical properties of theformation of favorable reservoir, reservoir distribution is relatively wide, continuous;feldspathic fine-grained sandstone reservoir levels weer generally rounded, better sorting, poorproperty the case of low porosity and low permeability reservoirs; sensitivity extent of eachlayer are weak, and Reservoir Evaluation of the wettability performance of the partialhydrophilic appropriate waterflood development; In Chang611,the ifrst and second classreservoir occupy a large area, a total of757km2accounting for56%of the total area of the reservoir, Chang6occupies a least area of two types of reservoir area, Chang612, Chang62, two types of reservoir area of between the above two layers. Of these results for the area favorable areas, screening, provide a basis for rolling development work.
Keywords/Search Tags:Sedimentary facies, Reservoir Characteristics, Log interpretation, Productivityprediction, Reservoir evaluation
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