苏里格南部气田大斜度井钻井技术
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摘要
苏里格南部区块大斜度井平均完钻井深3 900 m,平均水平位移1 200 m,施工过程中存在井深、位移大、轨迹控制难度大、地层可钻性差等技术难题,严重制约钻井速度。为此,从优化剖面设计、轨迹控制、钻具组合及钻头、螺杆选配等技术出发,形成了一套苏里格南部气田大斜度井高效钻井关键技术:"直-增-稳-微降"剖面、"两趟钻"轨迹、稳斜能力强的"四合一"钻具组合、适合该区块快速钻井的钻头及螺杆。通过关键技术的应用,2017年平均钻井周期缩短至11.95 d,较2016年平均钻进周期缩短2.56 d,提速17.64%,提速效果显著。
The extended reach wells in Southern Sulige Block have average total depth of 3 900 m and average horizontal displacement of 1 200 m. Their rate of penetration(ROP) is restricted seriously due to the technical difficulties in the process of construction, e.g. deep well, large displacement, difficult trajectory control, and poor formation drillability. In regard of this, a series of key drilling technologies for the efficient drilling of extended reach wells in Southern Sulige Gasfield were developed from the aspects of profile design optimization, trajectory control, bottom hole assembly(BHA) and bit and screw rod selection. They include"vertical-buildup-angle holding-slight drop" profile, "two-trip drilling" trajectory, "four-in-one" BHA with strong angle holding capacity, and bit and screw rod suitable for fast drilling in this block. Owing to the application of these key technologies, the average drilling cycle in 2017 is shortened to 11.95 d, which is 2.56 d shorter than that in 2016, and the ROP is increased by 17.64%,presenting remarkable ROP improvement effect.
The extended reach wells in Southern Sulige Block have average total depth of 3 900 m and average horizontal displacement of 1 200 m. Their rate of penetration(ROP) is restricted seriously due to the technical difficulties in the process of construction, e.g. deep well, large displacement, difficult trajectory control, and poor formation drillability. In regard of this, a series of key drilling technologies for the efficient drilling of extended reach wells in Southern Sulige Gasfield were developed from the aspects of profile design optimization, trajectory control, bottom hole assembly(BHA) and bit and screw rod selection. They include"vertical-buildup-angle holding-slight drop" profile, "two-trip drilling" trajectory, "four-in-one" BHA with strong angle holding capacity, and bit and screw rod suitable for fast drilling in this block. Owing to the application of these key technologies, the average drilling cycle in 2017 is shortened to 11.95 d, which is 2.56 d shorter than that in 2016, and the ROP is increased by 17.64%,presenting remarkable ROP improvement effect.
引文
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[4]张炳顺,谭勇志,张贵全,等.华北油田雁63断块丛式井快速钻井技术[J].石油钻采工艺,2013,35(5):13-15.ZHANG Bingshun,TAN Yongzhi,ZHANG Guiquan,et al.Fast drilling technique of cluster wells in Yan63 Block of Huabei Oilfield[J].Oil Drilling&Production Technology,2013,35(5):13-15.
[5]李云峰,胡中志,徐吉,等.南堡1-3人工岛大斜度定向井钻井技术[J].石油钻探技术,2014,42(1):61-65.LI Yunfeng,HU Zhongzhi,XU Ji,et al.High-inclination directional drilling technology in Nanpu 1-3 artificial island[J].Petroleum Drilling Techniques,2014,42(1):61-65.
[6]龙志平,王彦祺,周玉仓.隆页1HF页岩气井钻井关键技术[J].石油钻探技术,2016,44(2):16-21.LONG Zhiping,WANG Yanqi,ZHOU Yucang.Key drilling technologies for shale gas well Longye 1HF[J].Petroleum Drilling Techniques,2016,44(2):16-21.
[7]刘永亮.垦东12区块4号岛丛式井钻井技术[J].石油钻采工艺,2014,36(5):24-27.LIU Yongliang.Drilling technology for cluster wells on No.4 Island at Kendong Block 12[J].Oil Drilling&Production Technology,2014,36(5):24-27.
[8]张凯.大庆垣平1大位移井的钻井技术[J].石油钻采工艺,2014,36(1):26-28.ZHANG Kai.Drilling technology of Yuanping 1 extended reach well in Daqing[J].Oil Drilling&Production Technology,2014,36(1):26-28.
[9]李龙,牟小军,刘益宁,等.丛式大斜度井在乐东22-1气田的应用[J].石油钻采工艺,2011,33(1):35-37.LI Long,MU Xiaojun,LIU Yining,et al.Application of drilling high-inclination cluster wells in Ledong 22-1 Gas Field[J].Oil Drilling&Production Technology,2011,33(1):35-37.
[10]赵苏文,邵诗军,段泽辉,等.南海西部北部湾盆地大斜度长裸眼定向井钻井技术[J].石油钻采工艺,2011,33(1):27-31.ZHAO Suwen,SHAO Shijun,DUAN Zehui,et al.The drilling technology of big inclination long open hole directional well in the Southwest China Sea Oilfield[J].Oil Drilling&Production Technology,2011,33(1):27-31.
[11]高龙,王登治,翟小龙,等.黄36井区油页岩段水平井快速钻井技术[J].石油钻采工艺,2015,37(4):20-22.GAO Long,WANG Dengzhi,ZHAI Xiaolong,et al.Fast drilling technology for horizontal wells in oil shale segment of Huang 36 Well Area[J].Oil Drilling&Production Technology,2015,37(4):20-22.