A Porothermoelastic Model Considering the Dynamic Temperature--Perturbation Boundary Effect for Borehole Stability in Fractured Porous Rocks
文献类型：期刊论文
| 作者 | Gao, Jiajia2; Lin, Hai3; Sun, Jin1 ; Chen, Xiuping4; Wang, Huixiang5; Liu, Xianfeng6
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| 刊名 | SPE JOURNAL
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| 出版日期 | 2022-08-01 |
| 卷号 | 27期号:4页码:2491-2509 |
| ISSN号 | 1086-055X |
| 通讯作者 | Gao, Jiajia(yiyingtuoli@163.com) ; Lin, Hai(linhai2007021317@sina.com) |
| 英文摘要 | Conventional drilling design tends to inappropriately predict the mud density required for borehole stability of deep fractured porous rocks, such as shale, tight sandstone, and hot dry rock, because it is treated as a single--porosity case and even introduces the influence of weak plane to cover the effect on the fracture system. When the external loadings are applied, fractured porous rocks naturally display two different poromechanical responses of the matrix system and the fracture system considering respective hydraulic and mechanical properties. Besides, the constant temperature difference between the drilling mud and formation rock is often chosen as a boundary condition to solve the temperature balance equation, and thus the incorrect prediction of temperature variations of fractured rock further leads to inappropriate evaluation of the pore pressure and stress fields considering the thermo--hydromechanical (THM) coupling (porothermoelastic model), since a dynamic temperature--perturbation boundary condition related to the temperature at the borehole wall actually accounts for the circulating effect of the drilling mud. Therefore, this paper first uses the API RP 13D (1995) model in combination with the circulating temperature--fields model of Raymond (Raymond 1969) to obtain a set of fully transient analytical solutions to circulating temperature fields, including the four types of temperature inside the drilling pipe, borehole annulus, at the borehole wall, and formation. Furthermore, under local thermal equilibrium (LTE) condition, one considers the dynamic temperature--perturbation boundary condition and provides semianalytical porothermoelastic solutions to the field variables around a vertical borehole subjected to nonhydrostatic stresses in fractured porous rock with dual porosity and dual permeability. The solutions for field variables are obtained in line with the plane strain assumption. The variables include displacements, stresses, and two pore pressures of the matrix system and fracture system. The model is verified by the analytical solutions in the case of a porous medium with a single--porosity one under LTE condition. The main results show that the dual--porosity medium displays a higher borehole instability potential than the single--porosity one. This increasingly cooling effect increases the higher risk of the tensile transverse fracturing when the constant temperature--perturbation boundary condition chooses a smaller temperature difference than that of the dynamic case at a later time. The drilling mud--pressure window narrows with increasing time when the coupled porothermoelastic model is considered. It suggests that the drilling engineer takes into consideration the dynamic temperature--perturbation boundary effect, fracture spacing, and fracture width into the predrilling design of the time--dependent safe mud--pressure window (SMPW). |
| WOS关键词 | HEAT-TRANSFER ; POROELASTIC SOLUTION ; MULTIPLE-POROSITY ; DOWNHOLE FLUID ; FLOW ; DEFORMATION ; WELLBORE ; COEFFICIENTS ; EQUATIONS ; PRESSURE |
| 资助项目 | National Natural Science Foundation of China[51804269] ; National Key Research and Development Program of China[2019YFC0312301] ; Sanya Yazhou Bay Science and Technology City[2020-01-009] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| 出版者 | SOC PETROLEUM ENG |
| WOS记录号 | WOS:000841497500037 |
| 资助机构 | National Natural Science Foundation of China ; National Key Research and Development Program of China ; Sanya Yazhou Bay Science and Technology City |
| 源URL | [http://ir.idsse.ac.cn/handle/183446/9696]  |
| 专题 | 深海科学研究部_深海地球物理与资源研究室 |
| 通讯作者 | Gao, Jiajia; Lin, Hai |
| 作者单位 | 1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, Hainan, Peoples R China 2.Southwest Petr Univ, Petr Engn Sch, Chengdu, Peoples R China 3.CNOOC China Ltd, Tianjin Branch, Tianjin, Peoples R China 4.Sinopec Northwest Oilfield Co, Petr Engn Technol Res Inst, Urumqi, Peoples R China 5.Sinopec Shengli Petr Engn Co, Tarim Branch, Beijing, Peoples R China 6.PetroChina Tarim Oilfield Co, Emergency Ctr, Korla, Bayingolin Mong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Jiajia,Lin, Hai,Sun, Jin,et al. A Porothermoelastic Model Considering the Dynamic Temperature--Perturbation Boundary Effect for Borehole Stability in Fractured Porous Rocks[J]. SPE JOURNAL,2022,27(4):2491-2509. |
| APA | Gao, Jiajia,Lin, Hai,Sun, Jin,Chen, Xiuping,Wang, Huixiang,&Liu, Xianfeng.(2022).A Porothermoelastic Model Considering the Dynamic Temperature--Perturbation Boundary Effect for Borehole Stability in Fractured Porous Rocks.SPE JOURNAL,27(4),2491-2509. |
| MLA | Gao, Jiajia,et al."A Porothermoelastic Model Considering the Dynamic Temperature--Perturbation Boundary Effect for Borehole Stability in Fractured Porous Rocks".SPE JOURNAL 27.4(2022):2491-2509. |
入库方式： OAI收割
来源：深海科学与工程研究所
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