Oil & Gas Geology ›› 2021, Vol. 42 ›› Issue (1): 212-223.doi: 10.11743/ogg20210118

• Petroleum Development • Previous Articles     Next Articles

Geological characteristics of gas condensate reservoirs and their exploration and development prospect in the Jurassic continental shale of the Dongyuemiao Member of Ziliujing Formation, Fuxing area, eastern Sichuan Basin

Zhiguo Shu(), Lin Zhou, Xiong Li, Haotian Liu, Yong Zeng, Hongguang Xie, Mingjun Yao, Yanchun Wang   

  1. Exploration and Production Research Institute of Jianghan Oilfield Company, SINOPEC, Wuhan, Hubei 430070, China
  • Received:2020-07-01 Online:2021-02-28 Published:2021-02-07

Abstract:

Gas condensate reservoirs were recently discovered by Sinopec Jianghan Oilfield Company through Well Fuye10HF in the continental shale of the Dongyuemiao Member, Fuxing area, eastern Sichuan Basin.The well was tested with a daily gas rate of 55 800 cubic meters and liquid rate of 17.6 cubic meters, indicating a great breakthrough made in shale gas exploration in the area.An integrated analysis of core, drilling, logging and testing data was then combined with an assessment of rock quality, resource potential, preservation and surface conditions to characterize the reservoirs in terms of geology and development prospect.Applicable fracturing and production technologies to the reservoirs were also reviewed to provide a reference for the exploration and development of other shale reservoirs of similar geological context.The results show that the shale of high quality and extensive distribution in the member is physically sufficient for the generation of large-scale gas reservoirs.The member, conveniently buried in a moderate depth with gentle strata and undeveloped faults in the low-relief Fuxing area, is relatively friendly to a large-scale gas development.Despite a high clay mineral content and poor fracturability, the member responds sensitively to fracturing treatment featuring a "dense-fracture volume stimulation".The results also suggest that the reservoirs are of high pressure coefficient and produce in a way that requires further studies to formulate a suitable and efficient development scheme.

Key words: Development prospect, Well Fuye 10HF, Dongyuemiao Member, Ziliujing Formation, gas condensate reservoir, continental shale, Jurassic, Fuxing area, Sichuan Basin

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