Fracture pressure model for inclined wells in layered formations with anisotropic rock strengths

doi:10.1016/j.petrol.2016.10.050

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Fracture pressure model for inclined wells in layered formations with anisotropic rock strengths
	Ma, Tianshou 1,2,3; Zhang, Q. B.3; Chen, Ping 2; Yang, Chunhe 1; Zhao, J.3
刊名	JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
	2017
卷号	149 页码:393-408
关键词	Layered formations Fracture pressure Inclined well Anisotropic tensile strength Tensile failure criterion
ISSN号	0920-4105
DOI	10.1016/j.petrol.2016.10.050
英文摘要	Fracture pressure is one of the most important foundations of drilling engineering, and the anisotropy of tensile strength is also a distinct feature of layered formations, but the anisotropy of tensile strength has seldom received attention in the analysis of fracture pressure. In the present paper, a novel fracture pressure model was proposed for inclined wells in layered formations with anisotropic rock strengths. Firstly, the characteristics of anisotropic tensile strength were investigated. Secondly, four typical anisotropic tensile criteria were collected and assessed using the maximum absolute relative error (MARE), the average absolute relative error (AARE), and the standard error (SE). Thirdly, the fracture pressure model was proposed based on the stress distribution model and anisotropic tensile criterion. Finally, the influences of anisotropy ratio, bedding planes' occurrence, well path, in-situ stress and pore pressure on fracture pressure were investigated. The results indicated that the layered rocks display the distinct anisotropy in tensile strength, and the strength increases with the loading angle. The MARE, AARE and SE of the Nova-Zaninetti criterion is the lowest for all six kinds of typical layered rocks, followed by the Lee-Pietruszczak, Hobbs-Barron, and Single Plane of Weakness criteria, and therefore the Nova-Zaninetti criterion is recommended. The higher the anisotropy ratio in tensile strength, the higher the influence on fracture pressure involved. The influence of bedding planes' occurrence mainly depends on the initiation position of the fractures, the influence increases with increasing the horizontal stress ratio and pore pressure. Thus, the influence of anisotropy cannot be ignored in the prediction of fracture pressure.
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000393007900036
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3984]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 2.Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploita ; 3.Monash Univ, Dept Civil Engn
推荐引用方式 GB/T 7714	Ma, Tianshou,Zhang, Q. B.,Chen, Ping,et al. Fracture pressure model for inclined wells in layered formations with anisotropic rock strengths[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2017,149:393-408.
APA	Ma, Tianshou,Zhang, Q. B.,Chen, Ping,Yang, Chunhe,&Zhao, J..(2017).Fracture pressure model for inclined wells in layered formations with anisotropic rock strengths.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,149,393-408.
MLA	Ma, Tianshou,et al."Fracture pressure model for inclined wells in layered formations with anisotropic rock strengths".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 149(2017):393-408.