Lithologic Reservoirs ›› 2012, Vol. 24 ›› Issue (5): 22-26.doi: 10.3969/j.issn.1673-8926.2012.05.004

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Hydrocarbon accumulation rules of Wangchang Oilfield in Qianjiang Sag

GUO Feifei1， ZHANG Fan2， ZHANG Wu2， TANG Wenxu3   

  1. （1. Postdoctoral Research Institute， Henan Oilfield Company， Sinopec， Nanyang 473132， China； 2. Research Institute of Exploration and Development， Henan Oilfield Company， Sinopec， Nanyang 473132， China； 3. Research Institute of Exploration and Development， Jianghan Oilfield Company， Sinopec， Qianjiang 433124， China
  • Online:2012-10-20 Published:2012-10-20

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Abstract:

Based on the study of hydrocarbon generation potential, sedimentary system, reservoir conditions, tectonic conditions, temperature-pressure conditions, hydrocarbon distribution, the history of hydrocarbon generation, expulsion and migration of Qianjiang Formation in Wangchang Oilfield, the hydrocarbon accumulation rules were analyzed. The result shows that there are favorable hydrocarbon accumulation conditions in WangchangOilfield, and the hydrocarbon accumulation is mainly controlled by the distribution of hydrocarbon source rocks，favorable sand bodies, faults and the revolution of anticline structure. The hydrocarbon accumulation model is established, which is self source and mixed sources, vertical and lateral migration and multi-stage formations of hydrocarbon reservoir. The reservoirs are located
around the hydrocarbon generation sags, the hydrocarbon is mainly distributed in the Wanghcang anticline belt, the active period of fault is in accord with the period of hydrocarbon accumulation period, the hydrocarbon is migrated through faults and sand, and the migration pattern and accumulation direction of hydrocarbons are determined by the lateral sealing ability of faults.

Key words: high resolution, sequence stratigraphy, sedimentary cycle, stratigraphic framework, Yanchang Formation, Ordos Basin

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