田增艳, 杨贺卫, 李晓涵, 尹丽, 王信, 黄臣. 大港油田页岩油水平井钻井液技术[J]. 石油钻探技术, 2021, 49(4): 59-65. DOI: 10.11911/syztjs.2021012
引用本文: 田增艳, 杨贺卫, 李晓涵, 尹丽, 王信, 黄臣. 大港油田页岩油水平井钻井液技术[J]. 石油钻探技术, 2021, 49(4): 59-65. DOI: 10.11911/syztjs.2021012
TIAN Zengyan, YANG Hewei, LI Xiaohan, YIN Li, WANG Xin, HUANG Chen. Drilling Fluid Technology for Horizontal Shale Oil Wells in the Dagang Oilfield[J]. Petroleum Drilling Techniques, 2021, 49(4): 59-65. DOI: 10.11911/syztjs.2021012
Citation: TIAN Zengyan, YANG Hewei, LI Xiaohan, YIN Li, WANG Xin, HUANG Chen. Drilling Fluid Technology for Horizontal Shale Oil Wells in the Dagang Oilfield[J]. Petroleum Drilling Techniques, 2021, 49(4): 59-65. DOI: 10.11911/syztjs.2021012

大港油田页岩油水平井钻井液技术

Drilling Fluid Technology for Horizontal Shale Oil Wells in the Dagang Oilfield

  • 摘要: 针对大港油田沧东凹陷和歧口凹陷页岩油水平井水平段钻进过程中存在的井壁易失稳、井眼清洁效果差、摩阻和扭矩高等技术难点,在分析页岩油地层地质特征的基础上,制定了增强钻井液抑制性、封堵性和携岩性的技术对策,通过优选封堵剂、润滑剂等关键处理剂,形成了BH-KSM-Shale和BH-WEI-Shale强抑制强封堵高性能水基钻井液。性能评价结果表明,BH-KSM-Shale和BH-WEI-Shale强抑制强封堵高性能水基钻井液具有良好的抑制性能、携岩性能和封堵性能,能降低页岩渗透率,阻止压力传递,保证井壁稳定。大港油田36口页岩油水平井使用BH-KSM-Shale和BH-WEI-Shale强抑制强封堵高性能水基钻井液钻进水平段,平均井径扩大率6.8%,未发生与钻井液有关的井下故障。这表明,BH-KSM-Shale和BH-WEI-Shale强抑制强封堵高性能水基钻井液能解决大港油田页岩油水平井水平段钻进过程中的技术难点,可为大港油田页岩油水平井钻井提供技术支撑。

     

    Abstract: During the drilling of horizontal sections of horizontal shale oil wells in the Cangdong and Qikou sags of the Dagang Oilfield, technical difficulties such as wellbore instability, poor borehole cleaning, and high friction and torque were encountered. Based on analysis of geological characteristics of shale formation, technical countermeasures were made to enhance the inhibition, plugging, and rock-carrying properties of drilling fluids. Key treating agents including plugging agents and lubricants were optimized to form the BH-KSM-Shale and BH-WEI-Shale high-performance water base drilling fluids which possess good inhibition and plugging abilities. The performance evaluation results show that the drilling fluids have good inhibition performance, rock carrying performance and plugging performance. The developed drilling fluids can decrease the shale permeability, resist the pressure transfer, and ensure the wellbore stability. The BH-KSM-Shale and BH-WEI-Shale drilling fluids were applied to the drilling of the horizontal sections of 36 horizontal shale oil wells in the Dagang Oilfield. As a result, the average hole diameter enlargement rate of the horizontal sections was 6.8% and no downhole failure related to drilling fluids occurred. These results indicate that BH-KSM-Shale and BH-WEI-Shale drilling fluids can solve the difficulties in the drilling of horizontal sections of horizontal shale oil wells in the Dagang Oilfield, and provide technical support for the drilling of horizontal shale oil wells in the Dagang Oilfield.

     

/

返回文章
返回