Hydrocarbon-generating Potentials of Source Rocks of Shangkuli Formation in Labudalin Basin, Northeastern Inner Mongolia

The organic macerals of kerogen, with an abundance of organic matter, the maturity and the type of source rocks during the one group of Shangkuli Formation, lower Cretaceous in Labudalin Basin are discussed, based on the analytic technique of organic lithology and Rock-Eval analyses. Also discussed is the hydrocarbon generating potentials and features by element analyses on kerogen, Rock-Eval analyses and high temperature and pressure simulation on source rocks. The results show that the organic macerals of one group of Shangkuli formation source rock in Labudalin Basin are classified into 3 groups as follows: exinite, vitrinite and inertinite. The sapropel as an important oil generating component is the result of bacteria degrading algal. The content of the sapropel reaches 94%～97%. The organic materials of source rock are rather highly abundant, and the organic materials take type II1 or II2 kerogen as the dominant factor. The thermal evolutions of the most organic matter have reached a low maturation stage, and the organic matter mainly generates oil. The source rocks of Labudalin Basin with good oil generating potentials have very good prospect for petroleum exploration.