Experimental Study on the Compressive and Shear Mechanical Properties of Cement-Formation Interface Considering Surface Roughness and Drilling Mud Contamination
文献类型：期刊论文
| 作者 | Wang, Lei1; Liu, Bohang1,3; Yang, Hanzhi2; Guo, Yintong1; Li, Jing3; Liu, Hejuan1 |
| 刊名 | ENERGIES
 |
| 出版日期 | 2022-09-01 |
| 卷号 | 15期号:17页码:- |
| 关键词 | cement-rock interface drilling mud pollution flushing efficiency compressive strength incompatible deformation interface shear parameters |
| 英文摘要 | In a casing-cement sheath-formation system, the cement-formation interface is usually weakly cemented for the residual of drilling mud, in which a leakage path would easily form, threatening the safe operation of underground energy exploitation and storage. To evaluate the compressive and shear mechanical behavior of the cement-formation interface, cement-rock composite cylindrical specimens were prepared. Uniaxial and triaxial compression and direct shear tests were implemented. The flushing efficiency of the rock surface, compressive strength, interface incompatible deformation, parameters of shear strength, and morphology of shear failure surface were acquired and analyzed. Results show that the flushing efficiency of shale surface decreases from 76.7% to 64.2% with the surface roughness increasing from 0 to 2 mm. The flushing efficiency of sandstone is only 44.7%, remarkably lower than that of shale. With the stress condition transforming from uniaxial to triaxial compression, the feature of the stress-strain curves changes from elastic-brittle to elastoplastic, and the compressive strength increases from 20.6 similar to 60.1 MPa to 110 similar to 120 MPa. The cement part presents noteworthy plastic deformation and several micro shear fractures develop. There is incompatible deformation between cement and rock, which induces interface debonding for almost all the composite specimens. The internal friction angle and cohesive strength both decrease with the increase in pollution degree of drilling mud, and increase with the rise in surface roughness. The shear facture surface is not exactly the rock-cement interface, but usually manifests as a shear zone, in which the rock, cement, and interface all contribute to the final shear failure. The above findings would be valuable for the revealing of cement-formation interface failure mechanism. |
| 学科主题 | Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:000852854900001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35187]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS; 2.Chongqing University 3.China University of Petroleum; |
| 推荐引用方式 GB/T 7714 | Wang, Lei,Liu, Bohang,Yang, Hanzhi,et al. Experimental Study on the Compressive and Shear Mechanical Properties of Cement-Formation Interface Considering Surface Roughness and Drilling Mud Contamination[J]. ENERGIES,2022,15(17):-. |
| APA | Wang, Lei,Liu, Bohang,Yang, Hanzhi,Guo, Yintong,Li, Jing,&Liu, Hejuan.(2022).Experimental Study on the Compressive and Shear Mechanical Properties of Cement-Formation Interface Considering Surface Roughness and Drilling Mud Contamination.ENERGIES,15(17),-. |
| MLA | Wang, Lei,et al."Experimental Study on the Compressive and Shear Mechanical Properties of Cement-Formation Interface Considering Surface Roughness and Drilling Mud Contamination".ENERGIES 15.17(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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