The Resource Potential Studies Of Immature And Low Mature Petroleum And Explorative Target Selection In Huanghua Depression

The Resource Potential Studies of Immature and LowMature Petroleum and Explorative Target Selection in Huanghua DepressionABSTRACTUsing chromatography, chromatographic-mass spectrometry, carbon isotope spectrography and pyrolysis technology, especially and firstly using basin modeling evaluation technology and new theory of early stage petroleum formation, the author made comprehensive studies of hydrocarbon formation mechanism to immature and low mature oil, reservoir formation conditions and its formation model, quantitative resource evaluaticn, resource reserve sequence and explorative target evaluation in Huanghua depression. The author determined and proved the well-matched relationship between source rocks and four genetic types of immature and low mature oil: high paraffin content type from southern Kongdian is from regionally and stably deposited, extensively distributed source rocks within the second member of Kongdian formation; heaxy type from Qijiawu-Dazhongwang region in eastern Cangzhou; normal type from Koucun-xianzhuang region; light type within middle part of the first member of Sbahejie formation; they all belong to reservoir and source rocks from the same strata. In aspect of premature and low mature hydrocarbon formation mechanism to southern Kongdian, the author puts forward a new idea that early stage dissolved hydrocarbon in the natural evolution mainly consists of specific organic micro-component and dissolved macromolecule organic matter, it's due to biochemical and 13w temperature degradation, it is not belong to Tissot hydrocarbon formation theory of kerogen thermal degradation. In aspect of conditions to hydrocarbon reservoir formation, the author puts forward that high quality source rocks with abundant and easy hydrocarbon-produced micro-component is the basis of immature and low mature hydrocarbon reservoir formation, the best assemblage among source rocks, reservoir and cap is the prerequisite of hydrocarbon reservoir fonnation, whereas effective match among trap, hydrocarbon formation and migration is the key problem of immatire and low mature hydrocarbon reservoir. Using the most advanced method of basin modeling evaluation, the author firstly finished the quantitative evaluation of produced hydrocarbon quantity with immature and low mature oil in Huanghua depression, afterwards, calculated the total resource amount is 1.16855 billion tons, the rtsult is scientific and believable. Through resource reserve sequence analysis and resi(luat resource potential study, it provided scientific and geologic evidence for shai low to middle exploration zone and deployment, then selected profitable explorai.ive target. This study supplemented and completed the theory of kerogen thermal degradation to hydrocarbon formation.