扭转冲击器在金跃7-1井的现场试验
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摘要
为解决我国深井钻井速度慢和成本高的问题,需要抑制"黏滑振动"对PDC钻头的影响,为此而提出一种新的钻井提速工具——扭转冲击器。该工具可以将钻井液的部分液动能量转化为高频、周向振动,并直接作用于PDC钻头,保证下部钻具组合运动平稳,有效抑制"黏滑振动"对PDC钻头的影响,同时其高频的振动冲击也可以提高PDC钻头的破岩效率。扭转冲击器在塔里木油田金跃7-1井进行了现场试验,试验中工具工作稳定,提速效果达到了国外扭力冲击器同等水平,较螺杆钻具平均机械钻速提高了42%,在硬质泥岩地层提速更为明显,机械钻速提高了88%。试验结果表明扭转冲击器对深井钻井提速具有较好的作用效果。
To address the issues of deep well drillingin China like low ROP and high cost,it is necessary to suppress the influence of "stick-slip vibration" on PDC bit. On the basis of analyzing the drilling state of PDC bit,a new drilling speed-increasing tool—torsion impactor has been put forward. The tool can convert part of hydraulic energy of drilling fluid into high frequency and circumferential vibration,and directly act on PDC bit to ensure smooth movement of the lower BHA,and effectively restrain the influence of "stick-slip vibration" on PDC bit.High-frequency vibration impact can also improve the PDC bit rock breaking efficiency. The novel tool has been tested in the Well Jinyue 7-1 in Tarim Oilfield with stable work status. The drilling speed-increasing effect reached the same level as that of the foreign torque impactor. The ROP was 42% higher than that of the PDM. Drilling speed-increasing in hard mudstone formation is more obvious with the increased ROP of 88%. The test results show that the torsion impactor has a good effect on the drilling speed-increasing of deep well drilling.
To address the issues of deep well drillingin China like low ROP and high cost,it is necessary to suppress the influence of "stick-slip vibration" on PDC bit. On the basis of analyzing the drilling state of PDC bit,a new drilling speed-increasing tool—torsion impactor has been put forward. The tool can convert part of hydraulic energy of drilling fluid into high frequency and circumferential vibration,and directly act on PDC bit to ensure smooth movement of the lower BHA,and effectively restrain the influence of "stick-slip vibration" on PDC bit.High-frequency vibration impact can also improve the PDC bit rock breaking efficiency. The novel tool has been tested in the Well Jinyue 7-1 in Tarim Oilfield with stable work status. The drilling speed-increasing effect reached the same level as that of the foreign torque impactor. The ROP was 42% higher than that of the PDM. Drilling speed-increasing in hard mudstone formation is more obvious with the increased ROP of 88%. The test results show that the torsion impactor has a good effect on the drilling speed-increasing of deep well drilling.
引文
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[2]侯子旭,贾晓斌,李双贵,等.玉北地区深部地层扭力冲击器提速工艺[J].石油钻采工艺,2013,35(5):132-136.
[3]刘强,贺明敏,黄媚.川中须家河组牙轮-PDC混合钻头钻井提速实践[J].钻采工艺,2016,39(6):7-10.
[4]周祥林,张金成,张东清.Tork Buster扭力冲击器在元坝地区的试验应用[J].钻采工艺,2012,35(2):15-17.
[5]李欢欢,王玉玺,李秋杰.扭力冲击器在大庆油田肇深17井的试验应用[J].探矿工程(岩土钻掘工程),2013,40(4):44-47.
[6]马升武,张金斌,等.扭力冲击器在玉北地区应用研究[J].钻采工艺,2013,36(4):37-39.
[7]周燕,安庆宝,蔡文军,等.SLTIT型扭转冲击钻井提速工具[J].石油机械,2012,40(2):15-17.
[8]李秋杰,王春华,李玉海,等.液力衡扭旋冲提速工具及其在达深16井的应用[J].探矿工程(岩土钻掘工程),2015,42(1):31-33,37.
[9]祝效华,汤历平,等.PDC钻头黏滑振动机理分析[J].石油矿场机械,2012,41(4):13-16.
[10]吕苗荣,沈诗刚.钻柱黏滑振动动力学研究[J].西南石油大学学报(自然科学版),2014,36(3):150-159.
[11]李玮,何选蓬,闫铁,等.近钻头扭转冲击器破岩机理及应用[J].石油钻采工艺,2014,36(5):1-4.
[12]朱全塔,邹宗明,黄兵,等.导致钻铤失效的井下振动分析及其解决方案[J].天然气工业,2016,36(12):80-86.
[13]RUDAT J,DASHEVSKIY D,RUDAT J,et al.Development of an innovative model—based stick/slip control system[R].SPE/IADC 139996,2011.