Hao Fang, Chen Jianyu, Sun Yongchuan, Xie Xinong. Organic Facies Studies and Their Use in Sedimentary Basin Analysis[J]. Acta Sedimentologica Sinica, 1994, 12(4): 77-86.
| Citation:
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Hao Fang, Chen Jianyu, Sun Yongchuan, Xie Xinong. Organic Facies Studies and Their Use in Sedimentary Basin Analysis[J]. Acta Sedimentologica Sinica, 1994, 12(4): 77-86.
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Organic Facies Studies and Their Use in Sedimentary Basin Analysis
- Received Date: 1993-06-20
- Publish Date:
1994-12-10
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Abstract
An organic facies is defined as a mappable stratigraphic unit containing organic matter (OM)of a particular genetic type in cartaain abundance. A new organic facies classification，which is based on indicative genetic kerogen(OM)type。is proposed. The improved definition and classification makes organic facies capable of reflecting the origin，diagenetic alternation of organic matter comprehensively, and，the organic facies thus defined and classified，which must be identified on the basis of synthetical parameters other than by atomic H/C ratios and/or Rock-Eval Hydrogen Index values merely. Several new concepts concerning organic facies such as Vertical Organic Facies Sequence ( VOFS )，Organic Facies Association ( OFA ) and Organic Basin-fill Sequence ( OBFS ) are advanced, and their significance in basin analysis is discussed in detail.Several cases are presented in this paper which confirm that organic facies, especially VOFS，OFA and OBFS analysis can not only become a very usefull tool for prediction and three-dimensional mapping of petroleum source rocks, but also make up for some shortcomings of sedimentological studies that put the stress on coarse rocks, and therefore may play a distinctive role in identifying and accurately locating unconformities or sequence/ systems tract boundaries as well as in reconstructing the tectonic subsidence and sedimentary fill histories of sedimentary basins.
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