An evaluation method of hydrocarbon generating potential of highly mature and over-mature marine carbonate |
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| Authors: | Keming Cheng Zhaoyun Wang |
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| Institution: | (1) Research Institute of Petroleum Exploration and Development, 100083 Beijing, China |
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| Abstract: | How to restore the residual organic carbon and residual hydrocarbon-generating potential is discussed based on the hydrocarbon
degradability of source rock. The results indicate there is linear function relationship between the restoring coefficient
of residual organic carbon (Kc) and the vitrinite reflectance (R
o%) of various kinds of source rock, but the relationship is secondary functional between the restoring coefficient of residual
hydrocarbon-generating potential (Ks) and the vitrinite reflectance (R
o%). It is pointed out thatKc = (1 -Dresidual)/(1 -D
primary),Ks= Kc (D
primary/D
residual). The restoration of residual organic carbon and hydrocarbon-generating potential of the Cambrian and Ordovician highly mature
marine carbonate in the Tarim Basin and North China region shows that the lower limit value of hydrocarbon generating potential
and the organic matter abundance of carbonate source rock are basically the same as that of clastic rock. The technical difficulty
in hydrocarbon generating evaluation of highly mature and overmature carbonate is solved. |
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| Keywords: | restoring coefficient of residual organic carbon (K c) restoring coefficient of residual hydrocarbon generating potential (K s) highly mature and over-mature source rock hydrocarbon degradability (D) |
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