Journal of Jilin University(Earth Science Edition) ›› 2019, Vol. 49 ›› Issue (1): 230-239.doi: 10.13278/j.cnki.jjuese.20180222

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Formation Conditions and Resource Potentiality of Taizhou Formation in North Sag of South Yellow Sea Basin

Fu Yanxin, Tan Sizhe, Hou Kaiwen   

  1. Shanghai Branch of CNOOC Ltd., Shanghai 200335, China
  • Received:2018-07-25 Published:2019-01-18
  • Supported by:
    Supported by Program of Ministry of Land and Resources of the People's Republic of China (2017YQZYPJ0109)

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Abstract: Based on drill and seismic data, taking "environments control source rocks" as a breakthrough point,we analyzed the conditions for the formation of high-quality source rocks in North Sag in regard with the relationship between sedimentary environment and source rock development, combined with sedimentary facies, trace element characteristics and biomarker compound characteristics. At the same time, in view of the distribution and geochemical characteristics of this set of hydrocarbon source rocks, we discussed the resource potential of the Taizhou Formation source rocks of North Sag. The results show that the source rocks were developed in the deep-and semi-deep lacustrine facies under the saline water background, which is favorable for the preservation of organic matter and the formation of source rocks. The source rocks of Taizhou Formation in North Sag are widely distributed in large thickness, high organic abundance and high maturity, and have great hydrocarbon generating potential. Through basin simulation calculation, the hydrocarbon amount in North Sag is 112.18 million tons; with an accumulation coefficient of 1%-5%, the resource potential of North Sag is 1.12-5.60 million tons, a large amount of resources.

Key words: high quality source rocks, salty lake basin, geochemical characteristics, resource potential, South Yellow Sea basin

CLC Number: 

  • P624.7
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