页岩气水平井油井水泥的原位增韧技术研究

doi:10.11885/j.issn.1674-5086.2019.09.16.07

西南石油大学学报(自然科学版) ›› 2019, Vol. 41 ›› Issue (6): 68-74.DOI: 10.11885/j.issn.1674-5086.2019.09.16.07

页岩气水平井油井水泥的原位增韧技术研究

程小伟^1,2, 张高寅^1,2, 马志超³, 李斌⁴, 辜涛⁴

1. 油气藏地质及开发工程国家重点实验室·西南石油大学, 四川成都 610500;
2. 西南石油大学材料科学与工程学院, 四川成都 610500;
3. 中国石油大港油田分公司第一采油厂, 天津滨海新区 300270;
4. 中国石油西南油气田分公司工程技术研究院, 四川广汉 618300

收稿日期:2019-09-16 出版日期:2019-12-10 发布日期:2019-12-10
通讯作者: 程小伟,E-mail:chengxw@swpu.edu.cn
作者简介:程小伟,1977年生,男,汉族,陕西西安人,教授,博士,主要从事胶凝复合材料与其在固井中应用,新型特种胶凝材料方面的研究。E-mail:chengxw@swpu.edu.cn;张高寅,1994年生,男,汉族,甘肃庆阳人,硕士研究生,主要从事原位增韧水泥制备与性能方面的研究。E-mail:527710367@qq.com;马志超,1987年生,男,汉族,安徽肥西人,工程师,主要从事固井材料与工作液研究的研究。E-mail:mazhichao@petrochina.com.cn;李斌,1987年生,男,汉族,四川蓬溪人,工程师,硕士,主要从事钻井与固井相关技术研究。E-mail:libin2015@petrochina.com.cn;辜涛,1987年生,男,汉族,四川乐山人,工程师,博士,主要从事固井材料与工作液研究。E-mail:gutao_xn@petrochina.com.cn
基金资助:
国家重点研发计划（2016YFB0303600）

Technology of In-situ Toughening of Oil Well Cement in Shale Gas Horizontal Wells

CHENG Xiaowei^1,2, ZHANG Gaoyin^1,2, MA Zhichao³, LI Bin⁴, GU Tao⁴

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. School of Materials Science and Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
3. First Oil Production Plant, Dagang Oilfield Company, PetroChina, Binhai New Area, Tianjin 300270, China;
4. Engineering Technology Research Institute, Southwest Oil&Gas Field Company, PetroChina, Guanghan, Sichuan 618300, China

Received:2019-09-16 Online:2019-12-10 Published:2019-12-10

摘要/Abstract

摘要： 针对页岩气水平井开发过程中油井水泥作为一种非均质多孔脆性复合材料，难以承受大型水力压裂带来的非均质载荷，导致水泥环的力学完整性失效破坏问题，开展了油井水泥原位增韧技术研究。研究中采用了固相烧结法和球形重淬技术，获得了微晶铁铝酸钙（MB）作为原位增韧材料。研究结果表明，制备的原位增韧材料在提升力学性能的基础上降低了水泥石的弹性模量，养护7 d后的抗压强度可达24 MPa，抗拉强度提升50%，弹性模量降至5.55 GPa。微晶铁铝酸钙的增韧机制为：“裂纹偏转”、“裂纹终止”、“消耗断裂能”。该研究的开展对满足以页岩气开采条件下的油井水泥服役要求，延长页岩气井寿命，增加页岩气产能具有重要意义。

关键词: 页岩气水平井, 固井, 原位增韧材料, 力学性能, 页岩气产能

Abstract: As a non-homogeneous porous brittle composite material in the development of shale gas horizontal wells, oil well cement is difficult to withstand the heterogeneous load caused by large hydraulic fracturing, resulting in failure of the mechanical integrity of the cement sheath. Researches on oil well cement in-situ toughening technology was carried out. In the study, solid phase sintering and spherical re-quenching techniques were used to obtain microcrystalline brownmillerite (MB) as an in situ toughening material. The research indicates the prepared in-situ toughening material reduced the elastic modulus of the cement based on the improvement of mechanical properties. After 7 days of curing, the compressive strength ccould reach 24 MPa, the tensile strength was increased by 50%, and the elastic modulus was reduced to 5.55 GPa. The toughening mechanism of microcrystalline brownmillerite is: "crack deflection", "crack termination", "consumption fracture energy". The development of this study is great significance to meet the requirements of oil well cement service under shale gas mining conditions, extend the service life of shale gas wells and increase the production capacity of shale gas.

Key words: shale gas horizontal wells, cementing, in-situ toughening materials, mechanical property, shale gas production capacity

中图分类号:

TE256

程小伟, 张高寅, 马志超, 李斌, 辜涛. 页岩气水平井油井水泥的原位增韧技术研究[J]. 西南石油大学学报(自然科学版), 2019, 41(6): 68-74.

CHENG Xiaowei, ZHANG Gaoyin, MA Zhichao, LI Bin, GU Tao. Technology of In-situ Toughening of Oil Well Cement in Shale Gas Horizontal Wells[J]. 西南石油大学学报(自然科学版), 2019, 41(6): 68-74.

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页岩气水平井油井水泥的原位增韧技术研究

Technology of In-situ Toughening of Oil Well Cement in Shale Gas Horizontal Wells

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