四川盆地东部复兴地区侏罗系自流井组东岳庙段陆相页岩凝析气藏地质特征及勘探开发前景

doi:10.11743/ogg20210118

Abstract

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

CLC Number:

TE122.1

Zhiguo Shu, Lin Zhou, Xiong Li, Haotian Liu, Yong Zeng, Hongguang Xie, Mingjun Yao, Yanchun Wang. 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[J]. Oil & Gas Geology, 2021, 42(1): 212-223.

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层位	矿物成分含量/%
层位	石英	钾长石	斜长石	方解石	白云石	黄铁矿	粘土矿物
东三亚段	$\frac{18.0 \sim 34.3}{29.9}$	少见	$\frac{2.0 \sim 4.8}{2.5}$	$\frac{1.2 \sim 27.8}{9.8}$	$\frac{0 \sim 9.9}{2.2}$	无	$\frac{37.9 \sim 67.0}{55.4}$
东二亚段	$\frac{17.8 \sim 26.1}{20.8}$	少见	$\frac{1.3 \sim 2.6}{2.0}$	$\frac{34.0 \sim 59.6}{44.8}$	$\frac{1.9 \sim 5.7}{3.7}$	$\frac{0 \sim 3.3}{1.4}$	$\frac{16.3 \sim 37.3}{26.6}$
东一亚段	$\frac{16.1 \sim 35.2}{25.7}$	$\frac{0 \sim 2.2}{1.0}$	$\frac{2.1 \sim 4.2}{3.1}$	$\frac{0 \sim 23.8}{6.5}$	少见	$\frac{0 \sim 5.1}{1.0}$	$\frac{46.1 \sim 68.4}{60.3}$

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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

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