大庆中浅层低成本水基钻井液技术研究与应用
|
摘要
针对大庆油田中浅层水平井钻井过程中,易发生缩径、剥落、掉块等井下复杂,使用油基钻井液存在高成本、高污染,使用常规水基钻井液又存在配方复杂、维护困难的难题,通过优选低分子量聚胺抑制剂、降滤失剂、润滑剂等处理剂,并通过室内正交实验和配方优化,最终研发出一套低成本的中浅层水平井水基钻井液。室内实验表明,该体系具有优良的抑制性能,页岩滚动回收率大于90%,线型膨胀率低于8%;100℃条件下高温高压失水小于8 mL;润滑性良好,极压润滑系数0.09;能抗20%黏土污染,成本比油基钻井液下降60%以上,比常规水基钻井液下降30%以上。在现场应用过程中,该体系性能稳定,解决了缩径等井壁失稳难题,安全钻达设计井深。该钻井液技术在性能满足钻井施工的同时,能够替代油基钻井液,且成本比油基钻井液下降60%以上。
For Daqing oilfield and shallow horizontal well drilling process, prone to shrinkage,peeling,impellers downhole complex,using oil-base drilling fluid is high cost,high pollution,using conventional water-base drilling fluid and the problem of complex formula, maintenance difficulties, through the optimization of low molecular weight polyamine inhibitor, fluid loss agent, lubricant, such as treating agent, and through the orthogonal experiment in laboratory and formula optimization, finally developed a set of low-cost high-performance water-based drilling fluid. Laboratory experiments show that the system has excellent inhibiting performance,shale roll recovery is more than 90%,linear expansion rate is less than 8%. Under the condition of100 ℃ high temperature and high pressure water loss less than 8 ml;Good lubrication,extreme pressure lubrication coefficient 0.12; It can resist 20% clay pollution, and its cost is more than60% lower than that of oil drilling fluid and 30% lower than that of conventional water drilling fluid. In the field application process,the system has stable performance,solved the problem of hole wall instability such as reducing diameter, and reached the designed well depth safely. This drilling fluid technology can replace the oil based drilling fluid while the performance meets the drilling construction,and the cost is more than 60% lower than the oil based drilling fluid.
For Daqing oilfield and shallow horizontal well drilling process, prone to shrinkage,peeling,impellers downhole complex,using oil-base drilling fluid is high cost,high pollution,using conventional water-base drilling fluid and the problem of complex formula, maintenance difficulties, through the optimization of low molecular weight polyamine inhibitor, fluid loss agent, lubricant, such as treating agent, and through the orthogonal experiment in laboratory and formula optimization, finally developed a set of low-cost high-performance water-based drilling fluid. Laboratory experiments show that the system has excellent inhibiting performance,shale roll recovery is more than 90%,linear expansion rate is less than 8%. Under the condition of100 ℃ high temperature and high pressure water loss less than 8 ml;Good lubrication,extreme pressure lubrication coefficient 0.12; It can resist 20% clay pollution, and its cost is more than60% lower than that of oil drilling fluid and 30% lower than that of conventional water drilling fluid. In the field application process,the system has stable performance,solved the problem of hole wall instability such as reducing diameter, and reached the designed well depth safely. This drilling fluid technology can replace the oil based drilling fluid while the performance meets the drilling construction,and the cost is more than 60% lower than the oil based drilling fluid.
引文
[1]王建华,鄢捷年,丁彤伟.中浅层水基钻井液研究进展[J].钻井液与完井液,2007,24(1):71-75.
[2]鄢捷年.用于替代油基泥浆的抑制性水基钻井液的研究进展[J].国外钻井技术,2007,12(6):59-66.
[3]钟汉毅,邱正松,黄维安,等.胺类页岩抑制剂特点及研究进展[J].石油钻探技术,2010,38(1):104-108.
[4]仇伟.北二、三类油层开发的地面工程优化简化措施[J].石油石化节能,2017,7(7):23-25.
[5]侯佳荣.含油污泥压滤处理技术的试验研究[J].石油石化节能,2017,7(3):9-12.
[6]张宏英.提高转油站加热炉运行效率技术研究[J].石油石化节能,2017,6(8):19-22.
[7]侯杰.硬脆性泥页岩微米-纳米级裂缝封堵评价新方法[J].石油钻探技术,2017,45(3):32-37.
[2]鄢捷年.用于替代油基泥浆的抑制性水基钻井液的研究进展[J].国外钻井技术,2007,12(6):59-66.
[3]钟汉毅,邱正松,黄维安,等.胺类页岩抑制剂特点及研究进展[J].石油钻探技术,2010,38(1):104-108.
[4]仇伟.北二、三类油层开发的地面工程优化简化措施[J].石油石化节能,2017,7(7):23-25.
[5]侯佳荣.含油污泥压滤处理技术的试验研究[J].石油石化节能,2017,7(3):9-12.
[6]张宏英.提高转油站加热炉运行效率技术研究[J].石油石化节能,2017,6(8):19-22.
[7]侯杰.硬脆性泥页岩微米-纳米级裂缝封堵评价新方法[J].石油钻探技术,2017,45(3):32-37.