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Classification and Estimation of Sedimentary Organic Facies of Early Cretaceous Source Rocks in Jixi Basin

GAO Fu-hong，LIU Li，GAO Hong-mei，FAN Fu   

  1. College of Earth Sciences，Jilin University，Changchun 130061，China
  • Received:2006-10-18 Revised:1900-01-01 Online:2007-07-26 Published:2007-07-26
  • Contact: GAO Fu-hong

Abstract: Early Cretaceous source rocks in Jixi Basin include lacustrine mudstone, carbonaceous mudstone and coal. According to the organic petrology, sedimentology and organic geochemistry of source rocks, the sedimentary organic facies in this area can be divided into three types：hemideep-deep lacustrine organic, shore-swamp organic and high-stand swamp organic facies. Among them, the shore-swamp organic facies, the most important one, occurs widely in the area, and its organic matter is mainly Ⅲ-type. Its hydrocarbon-generation capacity varies largely, and oil and gas are its main products. In the locally distributed hemideep-deep lacustrine organic facies, the organic matter is mainly Ⅱ-type, partially Ⅲ-type. The hydrocarbon generation capacity of this facies is higher than others, and oil is the main product. The high-stand swamp organic facies just appears in the edge of the basin, and its hydrocarbon generation capacity is the lowest.

Key words: Early Cretaceous, source rock, sedimentary organic facies

CLC Number: 

  • P618. 13
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