Rapid and accurate evaluation of reserves in different types of shale-gas wells: Production-decline analysis

doi:10.1016/j.coal.2019.103359

	Rapid and accurate evaluation of reserves in different types of shale-gas wells: Production-decline analysis
	Wang, Ke 1,2,4,5; Jiang, Beibei 5; Li, Haitao 5; Liu, Qi 3; Bu, Chengzhong 4; Wang, Zhiqiang 4; Tan, Yongsheng 1,2
刊名	INTERNATIONAL JOURNAL OF COAL GEOLOGY
	2020-02-01
卷号	218 页码:13
关键词	Shale-gas wells Production and EUR estimation Empirical decline Improved Duong's method Hybrid method
ISSN号	0166-5162
DOI	10.1016/j.coal.2019.103359
英文摘要	The prediction of production levels and estimated ultimate recovery (EUR) with high accuracy is necessary for shale-gas development. Empirical decline methods are widely applied in the oil and gas industry owing to their simplicity and effectiveness; however, none of them can accurately predict the results for typical wells with fluctuating production or in transient flow (TF). To address the urgent issue, four empirical methods, namely the Arps' decline method, stretch exponential production-decline (SEPD) method, and two different patterns of rate decline for fracture-dominated reservoirs (the traditional Duong's method and Wks method), are compared in terms of their principles and characteristics. The results show that the traditional Duong's method is the most reliable, therefore, improvements are proposed (the improved Duong's method) to overcome the influence of production fluctuations and multiple solutions when considering wells that have achieved boundary-dominated flow (BDF). For reasonable production and EUR forecasting in wells with a rapid and unstable decline in TF production, a hybrid method is proposed using a combination of Yu's modified method based on SEPD (YM-SEPD) and the improved Duong's method. The accuracy and universality of the improved Duong's method and the rationality and effectiveness of the hybrid method are evaluated through field examples in the Weiyuan Block of the Sichuan Basin.
资助项目	State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation program[PLN201625] ; 13th Five-Year Special and Significant Project of National Science and Technology[2016ZX05017005-006] ; 13th Five-Year Special and Significant Project of National Science and Technology[2016ZX05052003]
WOS研究方向	Energy & Fuels ; Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000510955000002
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/23400]
专题	中科院武汉岩土力学所
通讯作者	Wang, Ke; Jiang, Beibei
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 3.CNPC Chuanqing Drilling Engn Co Ltd, Geol Explorat & Dev Res Inst, Chengdu 610051, Sichuan, Peoples R China 4.CNPC Chuanqing Drilling Engn Co Ltd, Shale Gas Explorat & Dev Dept, Chengdu 610051, Sichuan, Peoples R China 5.Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610500, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Wang, Ke,Jiang, Beibei,Li, Haitao,et al. Rapid and accurate evaluation of reserves in different types of shale-gas wells: Production-decline analysis[J]. INTERNATIONAL JOURNAL OF COAL GEOLOGY,2020,218:13.
APA	Wang, Ke.,Jiang, Beibei.,Li, Haitao.,Liu, Qi.,Bu, Chengzhong.,...&Tan, Yongsheng.(2020).Rapid and accurate evaluation of reserves in different types of shale-gas wells: Production-decline analysis.INTERNATIONAL JOURNAL OF COAL GEOLOGY,218,13.
MLA	Wang, Ke,et al."Rapid and accurate evaluation of reserves in different types of shale-gas wells: Production-decline analysis".INTERNATIONAL JOURNAL OF COAL GEOLOGY 218(2020):13.