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Diagenetic Numerical Modeling And Developmental History Of Porosity And Permeability Of Yinggehai Basin

Posted on:2011-11-13Degree:MasterType:Thesis
Country:ChinaCandidate:Y C WangFull Text:PDF
GTID:2120360305978109Subject:Mineral prospecting and exploration
Abstract/Summary:PDF Full Text Request
The article uses diagenetic numerical model to analyse the exploration targets of the YingGeHai Basin ,developing from single well to profile and then to plane. Burial history , thermal evolution of organic matter and diagenic evolution are discussed. Based on the foreign time-temperature chemical dynamics EASY% Ro model ,which combining clay mineral transformations, sterane isomerization,the formation of authigenic quartz and thermal maturation of organic matter together , the effect of overpressure is added and the model is updated to a multi-factorial evaluation system . Moreover, the above-mentioned diagenetic parameters are assembled to establish a diagenetic numerical modeling system suitable to overpressure and high-temperature environment.The reservoir parameters are finally determined together by sedimetation and diagenesis . By combining these two geologic factors to evaluate the classified reservoir ,we are able to build a diagenetic numerical modeling system to forecast the porosity of clastic rock reservoir which has a shale content below 25% and a cement content below 10% with a 1.7%-3.0% forecast error in porosity and a 0.67 relevence R2 in permeability.Indicated by drilling data, profile and plane diagenetic evolution ,classified reservoir evaluation and the modelling result of pore evolution ,basin Yinggehai has gone through a sedimental acceleration during Pliocene epoch, which was accompanied with higher diagenesis evolution velocity and faster reduction of porosity. Exploration potential is found in Huangmei team and the first segment of Meishan team in central depression through diagenetic numerical modeling and reservoir qulity forecast in the whole Yinggehai Basin.
Keywords/Search Tags:diagenesis, mumerical modeling, overpressure, porosity forecast, Yinggehai Basin
PDF Full Text Request
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