Volume 39 Issue 2
Jun.  2022
Turn off MathJax
Article Contents
YOU Fuchang, WEN Hua, WU Jiao, et al.High density clay-free oil based drilling fluid[J]. Drilling Fluid & Completion Fluid,2022, 39(2):146-150 doi: 10.12358/j.issn.1001-5620.2022.02.003
Citation: YOU Fuchang, WEN Hua, WU Jiao, et al.High density clay-free oil based drilling fluid[J]. Drilling Fluid & Completion Fluid,2022, 39(2):146-150 doi: 10.12358/j.issn.1001-5620.2022.02.003

High Density Clay-free Oil Based Drilling Fluid

doi: 10.12358/j.issn.1001-5620.2022.02.003
  • Received Date: 2021-10-30
  • Rev Recd Date: 2021-12-03
  • Publish Date: 2022-06-23
  • Barite in oil based drilling fluids at elevated temperatures is easy to sag, resulting in poor stability of the muds. Conventionally this is solved by adding more organophilic clay. High clay content in the mud results in high mud viscosity and high ECD, causing mud losses to happen. To deal with this problem, a small particle size emulsifier DEMUL with high electric stability and viscosifying property has been developed to formulate a high density clay-free oil based drilling fluid. The drilling fluid was treated with DEMUL, SEBS (a styrene-butene/butadiene-styrene block copolymer) and a gellant, the synergy of these additives helps improve the stability of the oil based drilling fluid. This drilling fluid has simple formulation, and each additive is added at a low concentration. Laboratory experiment showed that the oil based drilling fluid still retained good rheology after aging at 200 ℃ for 160 h. After standing still at 160 °C for 336 h, the settling factor of the drilling fluid was 0.5074, indicating that the drilling fluid had good stability. Furthermore, this drilling fluid also has good inhibitive capacity and extreme-pressure lubricity. This drilling fluid has been used in drilling the horizontal section of a high pressure shale gas well in Chuanyu area. During the whole drilling operation, the drilling fluid showed stable rheology, good sand carrying capacity and high inhibitive capacity, and no downhole trouble has ever been encountered.


  • loading
  • [1]
    文华,陈毅,侯炼. 高温高密度无黏土相钻开液室内研究[J]. 河南科技,2015(1):124-126. doi: 10.3969/j.issn.1003-5168.2015.01.044

    WEN Hua, CHEN Yi, HOU Lian. Laboratory study of clay-Free high temperature and high density drilling fluid[J]. Journal of Henan Science and Technology, 2015(1):124-126. doi: 10.3969/j.issn.1003-5168.2015.01.044
    蒋西平,周天辉,张勇. 无黏土相羟基酸盐钻井液[J]. 钻井液与完井液,2012,29(2):30-31. doi: 10.3969/j.issn.1001-5620.2012.02.010

    JIANG Xiping, ZHOU Tianhui, ZHANG Yong. Research on clay-free oxyacid salt drilling fluid[J]. Drilling Fluid & Completion Fluid, 2012, 29(2):30-31. doi: 10.3969/j.issn.1001-5620.2012.02.010
    张立新,刘瑞. 高密度油基钻井液在阳101H3-6井长水平段的应用[J]. 钻探工程,2021,48(7):79-83.

    ZHANG Lixin, LIU Rui. Application of high-density oil-based drilling fluid in the long horizontal section of Well Yang 101H3-6[J]. Drilling Engineering, 2021, 48(7):79-83.
    QIN Bobo, WANG Yidi, LUO Chunzhi, el at. Research on high temperature and high density white oil based drilling fluid and its application in well 201H7-6[J]. Open Journal of Yangtze Oil and Gas, 2019, 4(3):174-182. doi: 10.4236/ojogas.2019.43013
    周峰,张华,李明宗,等. 强封堵型无土相油基钻井液在四川页岩气井水平段中的应用[J]. 钻采工艺,2016,39(3):106-109. doi: 10.3969/J.ISSN.1006-768X.2016.03.32

    ZHOU Feng, ZHANG Hua, LI Mingzong, et al. Application of strong sealing clay-free oil based drilling fluid in horizontal section of Sichuan shale gas reservoir[J]. Drilling process, 2016, 39(3):106-109. doi: 10.3969/J.ISSN.1006-768X.2016.03.32
    张玉. 胜利油田钻井液油气层保护优化设计技术研究[D]. 中国石油大学(华东), 2018.

    ZHANG Yu. Optimal design of drilling fluid reservoir protection in Shengli Oilfield [D]. China University of Petroleum (East China), 2018.
    黄贤斌. 抗高温高性能无土相油基钻井液技术研究[D]. 中国石油大学(北京), 2017.

    HUANG Xianbin. High-temperature high-performance organoclay-free oil based drilling fluid technology research[D]. China University of Petroleum (Beijing), 2017.
    王燕,葛清晓,曾余祥. 无黏土高温高密度油基钻井液[J]. 科学技术创新,2019(30):48-49.

    WANG Yan, GE Qingxiao, ZENG Yuxiang. Clay free high temperature high density oil-based drilling fluid[J]. Science and Technology Innovation, 2019(30):48-49.
    孙金声,黄贤斌,蒋官澄,等. 无土相油基钻井液关键处理剂研制及体系性能评价[J]. 石油勘探与开发,2018,45(4):713-718.

    SUN Jinsheng, HUANG Xianbin, JIANG Guancheng, et al. Development of key additives for organoclay-free oil-based drilling mud and system performance evaluation[J]. Petroleum exploration and development, 2018, 45(4):713-718.
    蒋官澄,贺垠博,黄贤斌,等. 基于超分子技术的高密度无黏土油基钻井液体系[J]. 石油勘探与开发,2016,43(1):131-135. doi: 10.1016/S1876-3804(16)30015-5

    JIANG Guancheng, HE Yinbo, HUANG Xianbin, et al. A high-density organoclay-free oil base drilling fluid based on supramolecular chemistry[J]. Petroleum Exploration and Development, 2016, 43(1):131-135. doi: 10.1016/S1876-3804(16)30015-5
    邢立江,张书会. SEBS共混物的力学性能研究[J]. 化学与生物工 程,2020,37(4):58-60.

    XING Lijiang, ZHANG Shuhui. Mechanical properties of SEBS blends[J]. Chemistry & Bioengineering, 2020, 37(4):58-60.
    邢立江,张书会. SIBS流变性能研究[J]. 化学与生物工程,2021,38(6):55-58. doi: 10.3969/j.issn.1672-5425.2021.06.011

    XING Lijiang, ZHANG Shuhui. Rheological property of SIBS[J]. Chemistry & Bioengineering, 2021, 38(6):55-58. doi: 10.3969/j.issn.1672-5425.2021.06.011
  • 加载中


    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Figures(2)  / Tables(6)

    Article Metrics

    Article views (628) PDF downloads(155) Cited by()
    Proportional views


    DownLoad:  Full-Size Img  PowerPoint