Simulation of flow behaviour through fractured unconventional gas reservoirs considering the formation damage caused by water-based fracturing fluids

doi:10.1016/j.jngse.2018.06.039

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院页岩气与地质工程重点实验室

	Simulation of flow behaviour through fractured unconventional gas reservoirs considering the formation damage caused by water-based fracturing fluids
	Zhang, C. P.1; Ranjith, P. G.1; Perera, M. S. A.1,2; Li, X.3,4,5; Zhao, J.1
刊名	JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
	2018-09-01
卷号	57 页码:100-121
关键词	Hydraulic fracturing COMSOL Unconventional gas reservoir Formation damage Discrete fracture model (DFM)
ISSN号	1875-5100
DOI	10.1016/j.jngse.2018.06.039
英文摘要	Hydraulic fracturing is essential for commercial-scale gas production from many unconventional gas reservoirs. While the effectiveness of the fractures created is associated with the stress created during the fracturing process, the use of water in the hydraulic fracturing process has been found to significantly reduce fracturing efficiency. In particular, the formation damage caused by water imbibition may have a significant negative impact on the flow capacity through both created fractures and rock matrix. These effects can be minimised by using non-water based fracking fluid such as CO2. The intention of this study is to investigate the formation damage caused by water invasion and mull-cycle confinement on the gas production of fractured reservoirs. A laboratory-scale discrete fracture model (DFM) was developed based on the experimental results of a series of permeability tests conducted on intact and fractured siltstone samples under steady-state conditions at room temperature using gaseous CO2 and water as the injection fluids. The developed model shows the ability to simulate the flow behaviour of fractured samples. Based on the laboratory-scale model, an expanded DFM model of an assumed fractured reservoir with a horizontal well was then built to quantitatively investigate the influences of multicycle confinement and water invasion damage on gas production from gas reservoir. Based on the results of the expanded scale simulation, when the effect of water invasion damage on matrix permeability is not considered and only the change of fracture aperture is considered, the ratio of the rate of gas production from fractured formation without any formation damage, fractured formation suffering from the effect of mull-cycle confinement, fractured formation suffering from the combination effect of multi-cycle confinement and water invasion damage, and unfractured formation is around 15.15, 5.14, 2.23, 1 respectively, and the corresponding ratio of total gas production is around 17.62, 4.86, 2.13, 1 respectively, over a 10-year period. If the effects of water invasion damage on matrix permeability and fracture permeability are considered at the same time, the ratio of the rate of gas production rate from fractured formation without any damage on matrix permeability in the damage zone, fractured formation with 30% of initial permeability in the damage zone, fractured formation with 3% of initial permeability in the damage zone, and unfractured formation is around 2.23, 1.69, 0.94, 1 respectively, and the ratio of total gas production is 2.13, 1.54, 0.92, 1 respectively. This indicates that formation damage caused by mull-cycle confinement and fracturing water invasion can greatly impair gas production from unconventional gas reservoirs.
WOS关键词	SHALE PERMEABILITY ; BARNETT SHALE ; STRESS ; CONDUCTIVITY ; MODEL ; DEPENDENCE ; NETWORKS ; ROCKS
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000444521300010
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/88717]
专题	地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者	Ranjith, P. G.
作者单位	1.Monash Univ, Dept Civil Engn, Deep Earth Energy Lab, Bldg 60, Melbourne, Vic 3800, Australia 2.Univ Melbourne, Dept Infrastruct Engn, Bldg 176, Melbourne, Vic 3010, Australia 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 4.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 5.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, C. P.,Ranjith, P. G.,Perera, M. S. A.,et al. Simulation of flow behaviour through fractured unconventional gas reservoirs considering the formation damage caused by water-based fracturing fluids[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2018,57:100-121.
APA	Zhang, C. P.,Ranjith, P. G.,Perera, M. S. A.,Li, X.,&Zhao, J..(2018).Simulation of flow behaviour through fractured unconventional gas reservoirs considering the formation damage caused by water-based fracturing fluids.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,57,100-121.
MLA	Zhang, C. P.,et al."Simulation of flow behaviour through fractured unconventional gas reservoirs considering the formation damage caused by water-based fracturing fluids".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 57(2018):100-121.