Study on non-plane propagation characteristics of fracturing fractures in tight sandstone of Qiulin block under high geo-stress

doi:10.1088/1755-1315/602/1/012007

	Study on non-plane propagation characteristics of fracturing fractures in tight sandstone of Qiulin block under high geo-stress
	Huifen,Han 2,4; Junliang,Peng 2,4; Yintong,Guo 3; Xinping,Gao 2,4; Jian,Min 2,4; Jun,Zhou 3; Qiuyun,He 1
刊名	IOP Conference Series: Earth and Environmental Science
	2020-11-01
卷号	602 期号:1
关键词	Tight sandstone High geo-stress True triaxial Hydraulic fracturing Morphology scanning Non planar fracture
ISSN号	1755-1307
DOI	10.1088/1755-1315/602/1/012007
英文摘要	Abstract In order to study the propagation characteristics of hydraulic fracturing fractures in tight sandstone reservoirs in Qiulin block, Sichuan Basin, hydraulic fracturing of tight sandstone under high triaxial in-situ stress were carried out by using a large true triaxial fracturing physical experimental system. The fracture morphology and pump pressure curves under different in-situ stress, fracturing fluid types and displacement were obtained. The experimental results show that: (1) under high geo-stress conditions, the fracture morphology of tight sandstone after hydraulic fracturing is relatively simple, and complex fracture characteristics are less formed. The sedimentary characteristics and the development of internal natural fractures are the main control factors affecting the initiation and propagation of hydraulic fracturing fractures. (2) The characteristics of in-situ stress affect the fracture initiation and propagation direction. When the vertical in-situ stress is equal to the horizontal minimum principal stress, the horizontal fracturing fractures perpendicular to the vertical in-situ stress direction can be formed, and most of the fracturing fractures are non-plane propagation fractures. (3) When the low displacement slick water is used for fracturing, the fracturing fluid is easy to enter into the micro fractures inside the tight sandstone, which is helpful to open the original micro fractures, and the fracture morphology after fracturing is relatively complex; when the high displacement slick water or high viscosity linear gel is used for fracturing, the fractures with non-planar expansion are formed after fracturing. The research results can provide some technical support for the reservoir reconstruction of the second member of ES_2 formation in Qiulin block, Sichuan.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:1755-1307-602-1-012007
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/15662]
专题	中科院武汉岩土力学所
作者单位	1.Drilling and Production Technology Research Institute, CNPC Chuanqing Drilling Engineering Co., Ltd 2.Sichuan Key Laboratory of Shale Gas Evaluation and Production, Guanghan 618300, China 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071 China 4.Engineering Technology Research Institute of Petro China Southwest Oil and Gasfeld Company, Guanghan, Sichuan618300, China
推荐引用方式 GB/T 7714	Huifen,Han,Junliang,Peng,Yintong,Guo,et al. Study on non-plane propagation characteristics of fracturing fractures in tight sandstone of Qiulin block under high geo-stress[J]. IOP Conference Series: Earth and Environmental Science,2020,602(1).
APA	Huifen,Han.,Junliang,Peng.,Yintong,Guo.,Xinping,Gao.,Jian,Min.,...&Qiuyun,He.(2020).Study on non-plane propagation characteristics of fracturing fractures in tight sandstone of Qiulin block under high geo-stress.IOP Conference Series: Earth and Environmental Science,602(1).
MLA	Huifen,Han,et al."Study on non-plane propagation characteristics of fracturing fractures in tight sandstone of Qiulin block under high geo-stress".IOP Conference Series: Earth and Environmental Science 602.1(2020).