Genetic Potential of Goal-Measure Source Rocks of Lower Cretaceous in Jixi Basin

Abstract

Abstract: The Lower Cretaceous deposits are the most important source rocks in Jixi basin of Heilongjiang province. The types of source rocks include black mudstone, coal and carbonaceous mudstone. The organic lithology, the abundance of organic matter, the maturity and the type of source rock are discussed by the methods for organic geochemical analysis. The results show that the organic micro-component of the source rocks is dominated by exinite, with high content of vitrinite in coal and carbonaceous mudstone; the values of organic carbon, I_H and S₁+S₂ reflect that the source rock ranks medium-good one; the organic matter belongs to Type-III kerogen, partly to Type-II_B; the vitrinite reflectance ranges from 0.5% to 1.1%. According to the hydrocarbon-generating mode of Type-III kerogen, the source rocks would be just in the climax of generating liquid hydrocarbon, with oil-gas generating potentials. Also, the good comparison with typical coal-formed oil basins such as Gippsland basin and Tuha basin indicates that Jixi basin is of very good prospect for petroleum exploration.

Key words: Heilongjiang province, Jixi, Lower Cretaceous, source rock, organic geochemistry, kerogen

CLC Number:

TE112.112

FAN Fu, GAO Fu-hong, GAO Hong-mei. Genetic Potential of Goal-Measure Source Rocks of Lower Cretaceous in Jixi Basin[J]. Xinjiang Petroleum Geology, 2007, 28(1): 36-39.

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