泌页 HF1页岩油井钻井技术

Drilling technique of Well BY-1HF for shale reservoir

刘霞 程波 陈平 刘魁威 吴彩丽

LIU Xia CHENG Bo CHEN Ping LIU Kuiwei WU Caili

中石化河南油田分公司工程技术研究院，河南南阳　473132 中石化河南石油勘探局钻井工程公司，河南南阳　473132

Petroleum Engineering and Technology Research Institute, He’nan Oil.eld Company, Sinopec, Nanyang 473132, China Drilling Engineering Company, He’nan Petroleum Exploration Bureau, Nanyang 473132, China

泌页 HF1井是河南油田第 1口页岩油气勘探井。根据泌页 HF1井邻井情况和施工技术难点，对井身结构、钻井液体系和固井技术进行了设计。该井先钻导眼井，再回填侧钻，三开结构。二开定向侧钻段应用水基聚合物钻井液，钻遇大段泥、页岩地层时发生严重井壁失稳。三开井段采用旋转导向、白油基钻井液体系和尾管回接固井等新技术，保证了井下钻进安全、井眼质量及固井质量，提高了钻井速度。三开只用 6 d一趟钻钻完进尺 1 122 m，水平段长 1 044 m，平均井径扩大率 3.88%，起下钻正常，完钻后，通井电测一次成功，下套管顺利到底，固井质量合格。

Well BY-1HF is the first exploration well drilled in shale formation in He’nan Oilfield. Based on the information of ad-jacent wells and technical difficulties, the wellbore structure, drilling fluid and cementing technique are designed. Firstly, the pilot hole is drilled, and then backfilled and side tracked. Water based polymer drilling fluid is used in the side tracked section, and serious hole instability is encountered when drilling long distance mud shale formation. The new techniques of rotation directional tool, white oil based drilling fluid and sectional tie-back cementing were used in the third drilling section, which ensured the drilling safety, wellbore quality and cementing quality, and raised drilling speed. The footage of 1 122 m is drilled with only 6 days and one trip, and the horizon-tal section is 1 044 m with average overcut rate of 3.88%. The tripping, drifting, logging and casing running processes are successful, and the cementing work is qualified.