The Evaluation Study Of Source Rock In The North Yellow Sea And Peripheral Basins

The North Yellow Sea is the only nearshore oil and gas basin in which has been not found industrial oil and gas current in our country at present. The Korea had found industrial oil and gas current in Mesozoic stratum in the east of basin last century. The oil enrichment area belongs to our country. The study at home and abroad indicates that the Mesozoic stratum in the North Yellow Sea Basin and the Peripheral basin have preferable oil and gas foreground in recently years. Therefore, it have great practical and scientific significance to study the distribution of hydrocarbon source rock in the North Yellow Sea Basin and the peripheral basins and protect the China's marine rights and interests.To study the genetic potential of source rock in North Yellow Sea basin, Base on the analysis of source rock data in the North Yellow Sea and peripheral Anzhou and Jiaolai basin, we get some outcrops sample and analyze the sample in TOC,"A", HC, S1+S2, Ti, H/C, HI, Ro, Tmax and so on. The paper selectes the suitable evaluation standard and take appropriate evaluation indexes to study the Abundance of organic matter, type, maturity, depositional environment, and so on, and calculates the hydrocarbon generation potential of three basins .Moreover, the evaluating indicator weight is evaluated according to the applied scope and stability of evaluating indexes, and the weight evaluation criteria of hydrocarbon source rock is established, then the paper confirms that the evaluating results of hydrocarbon source rock dates those have been evaluated in the known area is unanimous with those results with this standard, analyze existent problems.Through studying of the North Yellow Sea Basin and the peripheral basins on longitudinal and crosswise in space, the paper knows that the North Yellow Sea basin,the Anzhou basin and the Jiaolai basin can be divide into the Jurassic,the Cretaceous,and the Eogene three big depositional cycle and the region source reservoir cap assemblage on longitudinal, which is the basic condition of oil gas production and the accumulation. On crosswise, the good hydrocarbon source rock in North Yellow Sea basin concentrates in the Cretaceous and the Jurassic,that in the Anzhou basin concentrates in the Cretaceous,that in Jiaolai basin concentrates in the Cretaceous system. Compared with the Anzhou basin and Jiaolai basin, the organic abundance in the North Yellow Sea basin is better. that in the Jiaolai basin and the Anzhou basin is mainlyâ…¡-â…¢on land, but that in the North Yellow Sea basin is mainlyâ…¡in the marine, which relates with organic source input, the hydrocarbon source rock of the Cretaceous in the North Yellow Sea basin mainly comes from the aquatic organism parent material type with mixing part of land source higher plant,that of the Jurassic comes from land source higher plant parent material type primarily. The thermal evolution stage of hydrocarbon source rock in the North Yellow Sea basin is mainly at the mature stage,and the Anzhou basin and the Jiaolai basin is at the mature-highly mature stage. In brief, the hydrocarbon source rock of Cretaceous and Jurassic in the North Yellow Sea basin comes up to the good hydrocarbon source standard, the Cretaceous system Longpan formation in the Anzhou basin reaches the good hydrocarbon source rock standard, and the Laiyang Hollow Shuinan section in the Jiaolai basin reaches the hydrocarbon source rock standard.