防漏早强韧性水泥浆体系的室内研究

吕斌; 周琛洋; 邱爱民; 李波; 张晔; 杨雪松

doi:10.3969/j.issn.1001-5620.2020.02.016

防漏早强韧性水泥浆体系的室内研究

doi: 10.3969/j.issn.1001-5620.2020.02.016

1. 中国石油集团工程技术研究院有限公司, 北京 102206;
2. 中国石油股份有限公司华北油田公司, 河北任丘 062552;
3. 中国石油集团川庆钻探长庆固井公司, 西安 710018;
4. 中国石油集团渤海钻探第一固井公司, 河北任丘 062552

基金项目:

中石油重大专项（二期）课题8“深井与水平井提速提效技术集成与示范”（2018E-2018）

详细信息

作者简介:
吕斌,工程师,1982年生,2008年硕士毕业于北京化工大学材料学专业,现主要从事固井外加剂和水泥浆体系的研发和推广工作。电话13146617677;E-mail:yyiyy-20000@163.com

中图分类号: TE256
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出版历程
- 收稿日期: 2019-12-12
- 刊出日期: 2020-04-28

Laboratory Study on Leak-Proof Early Strength Tough Cement Surry

1. CNPC Engineering Technology R&D Company Limited, Bejing 102206;
2. PetroChina Huabei Oilfield Company, Renqiu, Hebei 062552;
3. CCDC Changqing Oilwell Cementing Company, Xi'an, Shaanxi 710018;
4. NO.1 Cementing Branch of CNPC Bohai Drilling Engineering Company Limited, Renqiu, Hebei 062552

摘要

摘要: 大庆、长庆、克拉玛依等老区油田油气资源埋藏浅、井底温度低，加之长期注水开发等增产措施的广泛应用，储层地质结构复杂、压力系统紊乱，大斜度井、水平井钻遇溢漏同存的几率增加，固井过程中漏喷风险增大，对水泥浆体系提出了更高的要求。从材料学角度出发，利用经过表面预处理的新型油井水泥增强剂DRB-3S的低温增强、自悬浮稳定、混配性好的特点，将其与膨胀材料和抗窜增韧材料进行复配，制得了防漏早强韧性水泥浆体系。实验结果表明，该体系施工性能好，稠化过渡时间短，API失水量小，游离液为0，55℃时4 h抗压强度为7.2~11.5 MPa，还可有效封堵毫米级的渗透和裂缝性漏失，为复杂区块大斜度井、水平井固井质量的改善提供了有力的技术支持。
- 溢漏同存 /
- 防渗漏 /
- 早强 /
- 水泥浆 /
- 固井质量
Abstract: In some old oilfields such as Daqing, Changqing and Kelamayi, shallow burial of oil and gas, low bottom hole temperature, long-term wide use of stimulation measures such as water injection, complex geological structure of the reservoirs, as well as mutual interference of different pressure systems, are all factors contributing to the coexistence of leaking and overflow (or blowout) during high angle and horizontal well drilling as well as well cementing. Well cementing in these oilfields imposes higher demands on cement slurries. A new surface-pretreated oil well cement strengthening agent DRB-3S, having the characteristics of low-temperature strength, stable self-suspending ability and good mixing performance, was compounded with expansion material and anti-channeling toughness enhancing material to form a leak-proof tough early strength cement slurry. This cement slurry has good operational performance; the transition time of the thickening process is short, the API filtration rate is low and has zero free water. The 4 h compressive strength at 55℃ is between 7.2 MPa and 11.5 MPa. It is able to stop cement slurry loss into permeable and fractured formations with millimeter-sized flow channels. The cement slurry has provided a powerful technical support to the improvement of the quality of well cementing.
- Coexistence of overflow and leak /
- Leak prevention /
- Early strength /
- Cement slurry /
- Quality of well cementing

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参考文献(15)

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