油井水泥浆与多功能钻井液泥饼界面离子扩散阻碍机理

doi:10.7623/syxb201302020

石油学报 ›› 2013, Vol. 34 ›› Issue (2): 359-365.DOI: 10.7623/syxb201302020

油井水泥浆与多功能钻井液泥饼界面离子扩散阻碍机理

顾　军 1 　李新宏 1 　先　花 2　曾鹏珲 3 　杨易骏 1　何吉标 1　温桂平 1 　沈彬亮 3

1. 中国地质大学构造与油气资源教育部重点实验室湖北武汉 430074; 2. 中国石化河南油田公司石油工程技术研究院河南南阳 473132;3. 中国石化南方勘探公司井筒技术处四川成都 610041

收稿日期:2012-08-14 修回日期:2012-12-05 出版日期:2013-03-25 发布日期:2013-01-31
通讯作者: 顾军
作者简介:顾军,男,1966年9月生,1986年毕业于西南石油学院钻井工程专业，现为中国地质大学（武汉）石油与天然气工程专业教授、博士生导师,主要从事固井完井理论与层间封隔技术研究。
基金资助:
国家自然科学基金项目（No.51174180和No.40972103）和中国石化石油工程技术先导试验项目(JSG12013)资助。

Hindering mechanism of ion diffusion at the interface between oil-well cement slurry and mud cake from multifunctional drilling fluid

GU Jun 1　 LI Xinhong 1　 XIAN Hua 2 　ZENG Penghui 3　 YANG Yijun 1　 HE Jibiao 1 　WEN Guiping 1 　SHEN Binliang 3

Received:2012-08-14 Revised:2012-12-05 Online:2013-03-25 Published:2013-01-31

摘要/Abstract

摘要：

对泥浆转化为水泥浆（MTC）固井液水化离子可扩散进入多功能钻井液泥饼的机理已有研究，但对油井水泥浆水化离子不能扩散运移进入多功能钻井液泥饼的机理尚未清楚。采用离子色谱仪、原子吸收分光光度计和X射线衍射仪，从油井水泥浆与MTC固井液离子组成的差异性入手，对油井水泥水化离子向多功能钻井液泥饼扩散运移的阻碍机理进行了研究。结果表明，油井水泥浆中Ca²⁺的质量分数远远大于MTC固井液中Ca²⁺的质量分数，在油井水泥与多功能钻井液泥饼界面生成了CaCO₃、CaSO₄和Ca(OH)₂，而MTC固井液中Na⁺的质量分数则大于油井水泥浆中Na⁺的质量分数;Na⁺可改变泥饼中活性颗粒表面的ζ电位和破坏钻井液有机处理剂表面形成的水膜是MTC固井液中水化离子能扩散运移进入多功能钻井液泥饼的主要原因，而在油井水泥与多功能钻井液泥饼界面生成的CaCO₃、CaSO₄和Ca(OH)₂沉淀堵塞孔道则是油井水泥浆水化离子不能扩散运移进入多功能钻井液泥饼的主要机理。

关键词: 固井二界面, 油井水泥, 泥浆转化为水泥浆, 多功能钻井液, 离子浓度, 扩散运移

Abstract:

The mechanism that hydration ions in the mud to cement slurry (MTC) cementing fluid can diffuse and migrate into the mud cake from multifunctional drilling fluid has been well researched, while it still remains unclear at present why hydration ions in the oil-well cement can not diffuse into the mud cake from multifunctional drilling fluid. Herein, we examined differences in ion compositions of the oil-well cement and the MTC cementing fluid by means of ion chromatography, atomic absorption spectrophotometer and X-ray diffraction, and investigated thoroughly the hindering mechanism that prevent hydration ions in the oil-well cement from diffusing and migrating into the mud cake from multifunctional drilling fluid. The result indicated that Ca²⁺ in the oil-well cement has a mass fraction much higher than that in the MTC cementing fluid and can form CaCO₃, CaSO₄ and Ca(OH)₂ at the interface between the oil-well cement and the mud cake from multifunctional drilling fluid. The mass fraction of Na⁺ in the MTC cementing fluid, however, is much higher than that in the oil-well cement, moreover, Na⁺ can change the ζ potential on the surface of active particles in the mud cake and destroy the water film formed on the surface of organic additives from drilling fluid, which are the major reasons that make hydration ions in the MTC cementing fluid capable of diffusing and migrating into the mud cake from multifunctional drilling fluid. Whereas, the CaCO₃, CaSO₄ and Ca(OH)₂ formed at the interface of the oil-well cement and the mud cake from multifunctional drilling fluid may precipitate and block apertures, which is attributed to the main hindering mechanism that prevents hydration ions in the oil-well cement from diffusing and migrating into the mud cake from multifunctional drilling fluid.

Key words: cement-formation interface, oil-well cement, mud to cement slurry; multifunctional drilling fluid; ion concentration; diffusive migration

顾　军李新宏先　花曾鹏珲杨易骏何吉标温桂平沈彬亮 . 油井水泥浆与多功能钻井液泥饼界面离子扩散阻碍机理[J]. 石油学报, 2013, 34(2): 359-365.

GU Jun LI Xinhong XIAN Hua ZENG Penghui YANG Yijun HE Jibiao WEN Guiping SHEN Binliang . Hindering mechanism of ion diffusion at the interface between oil-well cement slurry and mud cake from multifunctional drilling fluid[J]. Editorial office of ACTA PETROLEI SINICA, 2013, 34(2): 359-365.

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油井水泥浆与多功能钻井液泥饼界面离子扩散阻碍机理

Hindering mechanism of ion diffusion at the interface between oil-well cement slurry and mud cake from multifunctional drilling fluid

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