Study On Organic Geochemistry Features Of Deep Source Rocks In Dongying,zhanhua And Weibei Sag

Throughout Jiyang depression, in the first 4th member of Shahejie formation, the southern Dongying Sag is the most developed that contain shale and oil shale deposition which have rich organic matter, the thickness and the quality of source rock are getting worse; the source rock in in the third member of Shahejie formation are more developed in zhanhua and dongying, but in the north of zhanhua depression, the thickness and the quality of source rock are better than dongying depression, because of the Buried deep factors ,the source rock in in the first member of Shahejie formation are not the effective source of rock, but it Has a certain amount in Zhanhua area. The differences between Different depression and various source rock display the source rock from south to north are the main source of hydrocarbons with the Stratigraphic become new, but raw hydrocarbons have a lower potential in chezhen depression. Even in the same basin, different stages of evolution will also have different types of lakes and form the different types of hydrocarbons.Against the evolutionary character hydrocarbons in study areas, when we analyze abundance of organic matter of dark clay rocks in various sags, the content of organic carbon are mainly applicated, and also consider chloroform asphalt"A"and total hydrocarbons content. Maturation of hydrocarbons source rock has many of the indicators, such as Optical, chemical and biological marks of many parameters. Because the organic matter of source rock is a complex mixture, The first quality of life are various which are affected by the environment, climate changes and Lake plane, The Heterogeneity are not exist on different source of hydrocarbons, and exists in the same internal source of hydrocarbons; not only in the feature of organic matter,but also in the combined lithologic and the development of paleontologist.Because the main source of hydrocarbons are not reach in the mature stage in Dongying sag, Organic microscopic components are easily identified, the result are more reliable, so the research determine organic matter type according to mirror. The research tested in the Ro of the samples of hydrocarbons source in the first 4th member of Shahejie formation, the deep diagram are formed by data, and using the methods of the ternary extraction, supercritical extraction and chloroform extraction systemic contrast basic characteristics. The marked features of hydrocarbons show a feature of the Heterogeneity which are larger differences in different samples laid the foundation for the study of the inversion of magnetic field. The research directed at different type of hydrocarbons source, analyse and add up admixture of hydrocarbons carbon isotopes of normal paraffin hydrocarbon in in the first 4th member of Shahejie formation,in the third member of Shahejie formation and in the middle third member of Shahejie formation.The corruption, the shell group, the quality of the group and inertia of microscopic components of kerogen samples in different wells of Kongdian formation in Weibei sag. Different rock type of hydrocarbons source of organic microscopic components in Weibei sag have their own features, that fully reflects close links between the fully reflects the environment, hydrocarbons source of the types and organic constituent. The source of hydrocarbons are physical obvious in Kongdian formation that indicate its diversity and the olytrope of sedimentation. The relatively high mature stage and the lower atomic ratio of H/C and C/O in Kongdian formation, Dongying sag are not ideal for the type of organic matter. The evolution of heat degree of hydrocarbons source relatively low in Kongdian formation,which are mainly in low mature—mature stage, so IH can better reflect original organic matter type of hydrocarbons. The research comprehensively analysis and evaluate organic matter tape which depends on microscopy of kerogen, considering elements of kerogen,the parameters of rock pyrolysis,composition of saturation hydrocarbon and saturation hydrocarbon in different exploration degree and the mature hydrocarbon source rocks of concrete details.The hydrocarbon source rocks in Zhanhua sag are mainly in the first 4th and third members of Shahejie formation, and which are not hydrocarbon source rock in Kongdian formation. The research mainly discusses geochemistry nature of hydrocarbon source rocks to the upper section of Kongdian formation. Organic carbon of rock samples in Zhanhua sag are different distribution in different layers.