Diagenetic Numerical Modeling And Reservoir Quality Predictions Of The Target Strata Of Qiongdongnan Basin

The article researches the diagenesis field of the QiongDongNan Basin deeply and widely from single well to profile and then to plane ,making use of Diagenesis numerical modeling according to the method of"dot—line—plane",in order to assessing the reservoir quality in the Middle-Deep Strata of QiongDongNan Basin and predicting the range of profitable reservoir. In the base of inverting burial history, the text further disgusesses the relation between thermal evolution of organic matte and diagenic evolution; Because of effect of buried depth and the long diagenic time , the diagenic intensity of QiongDongNan Basin heightens ordinally from east to west , and from the middle to the north and south sides and they don't evolve synchronical in the same depth. The plane throughgoing rule of diagenic field in the formation of lingshui group demonstrates that, because of the lower depth , the east part of the QiongDongNan Basin's diagenic intensity is relative weak , the secondary pore developed well , the organic matter keep the phase of maturity and high-maturity is in the stage of middle diagenesis phase and develops the facies of middle dissolution. Because of the higher depth ,the west part of the QiongDongNan Basin's diagenic intensity is relative powerful , the secondary pore developed well , the organic matter keep the phase of maturity and post-maturity,reservoir is in the stage of middle and late diagenesis phase and develops the facies of middle and late dissolution.It is known that the nowadays'condition of reservoir is desided by sedimentary facies and diagenisis, in the base of considing them ,the text sets up the single well and plane model of porosity prediction to have predicted the porosity of the formation of sanya group and lingshui group, according to the principle of multiple element linearity stepwise regression. In the condition that the averge content of interstitial matter is 29%, the averge corrigendum of the model is 2.48%.Though analyzing the gas containing reservoir that has found in the QiongDongNan Basin and making use of the method of statistics, the lower limit of physical property is formulated so that it is able to fit the whole basin, then predict the distribution range of valid gas containing reservoir in the formation of huangliu group.By means of diagenesis numerical modeling and reservoir quality predictions in QiongDongNan basin, the fruit of the text studing can not only supplement and prove the course theory of diagenesis but also can change present situation that the research and knowledge of reservoir in the basin is less ,further the method and outcome have an very important affect on finding the deveped region of beneficial reservoir and guiding the oil and gas prospecing.