Experimental study on influencing factors of fracture propagation in fractured carbonate rocks

doi:10.1016/j.jsg.2019.103955

	Experimental study on influencing factors of fracture propagation in fractured carbonate rocks
	Guo, Yintong 3; Hou, Longfei 2; Yao, Yiming 1; Zuo, Luo 1; Wu, Zhiying 1; Wang, Lei 3
刊名	JOURNAL OF STRUCTURAL GEOLOGY
	2020-02-01
卷号	131 页码:13
关键词	Carbonate rocks Gelled acid Hydraulic fracturing Fracture morphology characteristics Composite fracturing Fracturing fluid
ISSN号	0191-8141
DOI	10.1016/j.jsg.2019.103955
英文摘要	Carbonate reservoirs show poor porosity and permeability in matrix, it is necessary to improve the permeability channel through reservoir reconstruction. The influence of different fracturing parameters on fracture propagation of carbonate rock is studied, which is of great significance to hydraulic fracturing design of carbonate rock. In this paper, a series of hydraulic fracturing experiments were performed under different conditions, the fracturing pump pressure curve, radial deformation characteristics and fracture morphology were studied and analyzed. The results show that: (1) The rock-acid reaction between gelled acid and carbonate rock produces etching wormholes, changes the pore structure and weakens the mechanical parameters of carbonate rocks, which is conducive to reducing fracturing pressure and increasing fracture complexity; (2) The types of fracturing fluids and the viscosity significantly affect fracturing rupture pressure and the width of the fracture. Under the same in-situ stress and flow rate conditions, the fracturing rupture pressure of slick water is the lowest and that of guar gum is the highest; (3) Composite fracturing can improve the complexity of fractures in carbonate reservoir, for carbonate rocks with fracture developed near wellbore, complex fracturing fractures can be made by slick water fracturing, and main fracturing surfaces can be eroded by gelled acid to improve the width and increase the roughness. (4) To solve the problem of high fracturing pressure under high in-situ stress, gelled acid can be used for pretreatment to reduce fracturing pressure, and then non-reactive fluid, slick water or guar gum can be used for fracturing. Our research findings provide a reliable basis for deep fractured carbonate reservoir reconstruction.
资助项目	National Natural Science Foundation of China[51574218] ; National Science and Technology Major Project of China[2017ZX05005-004] ; National Science and Technology Major Project of China[2017ZX05036-003] ; Sinopec Ten Dragons Project[P18058]
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000512484400021
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/23448]
专题	中科院武汉岩土力学所
通讯作者	Guo, Yintong
作者单位	1.SINOPEC Res Inst Petr Engn, State Key Lab Shale Oil & Gas Enrichment Mech & E, Beichen East Rd, Beijing 100101, Peoples R China 2.Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China 3.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Guo, Yintong,Hou, Longfei,Yao, Yiming,et al. Experimental study on influencing factors of fracture propagation in fractured carbonate rocks[J]. JOURNAL OF STRUCTURAL GEOLOGY,2020,131:13.
APA	Guo, Yintong,Hou, Longfei,Yao, Yiming,Zuo, Luo,Wu, Zhiying,&Wang, Lei.(2020).Experimental study on influencing factors of fracture propagation in fractured carbonate rocks.JOURNAL OF STRUCTURAL GEOLOGY,131,13.
MLA	Guo, Yintong,et al."Experimental study on influencing factors of fracture propagation in fractured carbonate rocks".JOURNAL OF STRUCTURAL GEOLOGY 131(2020):13.