IMECH-IR  > 流固耦合系统力学重点实验室
Pore pressure and stress distribution analysis around an inclined wellbore in a transversely isotropic formation based on the fully coupled chemo-thermo-poroelastic theory
Cao WK; Deng JG; Liu W; Yu BH; Tan Q; Yang L(杨柳); Li Y; Gao JJ; Liu, W (reprint author), China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China.
Source PublicationJOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
2017-04-01
Volume40Pages:24-37
ISSN1875-5100
AbstractWellbore instability is a widespread problem when drilling in shale formations particularly with water based drilling fluid. The main reason for the occurrence of wellbore instability is that stress concentration and pore pressure redistribution occur around the wellbore once a hole is drilled; current studies show that the drilling fluid temperature and solute mass fraction play important roles during the process. In this work a non-linear fully coupled chemo-thermo-poroelastic finite element model is developed to quantitatively access thermal and chemical effects on time-dependent pore pressure and effective stresses; in addition material constant sensitivity analysis of an inclined well drilled in a transversely isotropic formation is presented. The results reveal the following: fluid transfer is greatly affected by thermal and chemical osmosis the lower temperature and higher solute mass fraction of the drilling fluid contribute to decreasing the pore pressure and are beneficial for wellbore stability and thermal parameters (such as thermal osmosis coefficient and thermal diffusivity) and chemical parameters (such as reflection coefficient and solute diffusion coefficient) have high effects on the pore pressure and effective stresses. Anisotropy ratio analysis of the material constants indicates that the pore pressure and effective stresses are very sensitive to Young's modulus and the permeability ratio but are not sensitive to Poisson's ratio. Therefore the developed coupled chemo-thermo-poroelastic theory illustrates that optimization of the reduction of the drilling fluid temperature while maintaining a high solute mass fraction could enhance wellbore stability. (C) 2017 Elsevier B.V. All rights reserved.
KeywordChemo-thermo-poroelastic Fully Coupled Finite Element Wellbore Stability Shale
DOI10.1016/j.jngse.2017.02.002
Indexed BySCI ; EI
Language英语
WOS IDWOS:000397691300003
WOS KeywordBOUNDARY-ELEMENT METHOD ; BOREHOLE ; ROCKS ; MEDIA ; WATER
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Chemical
Funding OrganizationNatural Science Foundation of China(11502304 ; National Basic Research Program of China(2015CB251202) ; Science Foundation of China University of Petroleum Beijing(C201601 ; 51521063) ; 2462013YJRCO23)
Classification二类
Ranking5+
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60565
Collection流固耦合系统力学重点实验室
Corresponding AuthorLiu, W (reprint author), China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China.
Recommended Citation
GB/T 7714
Cao WK,Deng JG,Liu W,et al. Pore pressure and stress distribution analysis around an inclined wellbore in a transversely isotropic formation based on the fully coupled chemo-thermo-poroelastic theory[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2017,40:24-37.
APA Cao WK.,Deng JG.,Liu W.,Yu BH.,Tan Q.,...&Liu, W .(2017).Pore pressure and stress distribution analysis around an inclined wellbore in a transversely isotropic formation based on the fully coupled chemo-thermo-poroelastic theory.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,40,24-37.
MLA Cao WK,et al."Pore pressure and stress distribution analysis around an inclined wellbore in a transversely isotropic formation based on the fully coupled chemo-thermo-poroelastic theory".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 40(2017):24-37.
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