玛湖凹陷西斜坡区钻井提速技术研究与应用
|
摘要
玛湖凹陷西斜坡区钻井过程中存在地层岩性变化大,上部地层易发生阻卡、地层压力系统复杂、漏失现象严重、钻井周期长等难点。针对钻井难点,通过开展井身结构优化,二开段优选高效PDC钻头,三开段优选扭力冲击器+PDC钻头,优化钻井液防漏堵漏配方,形成适合该区的钻井配套提速技术。经现场应用表明,机械钻速提高了37.4%,复杂时率由2.50%降至0.85%,钻井周期缩短37 d,形成的钻井配套提速技术提速效果明显。
In west slope, Mahu Depression, some downhole complexities and accidents of sticking and bit balling are likely to occur in the upper strata due to large lithological variation. Moreover,both complex formation-pressure system and big change of regional pressure bring about other difficulties, such as serious loss circulation, poor drillability, low ROP, and long drilling cycle. So, some corresponding technologies to improve drilling rate were developed,containing optimizing hole structure, optimizing high-efficient PDC bit in the 2 nd spudding, optimizing torque impacter + PDC bit in the 3 rd spudding, and optimizing loss prevention and control formula for drilling fluid. These technologies show an obvious effect from three aspects, for instance, ROP increasing by 37.4%, downhole accident ratio decreasing to 0.85% from 2.50%, and drilling cycle reducing to 37 d.
In west slope, Mahu Depression, some downhole complexities and accidents of sticking and bit balling are likely to occur in the upper strata due to large lithological variation. Moreover,both complex formation-pressure system and big change of regional pressure bring about other difficulties, such as serious loss circulation, poor drillability, low ROP, and long drilling cycle. So, some corresponding technologies to improve drilling rate were developed,containing optimizing hole structure, optimizing high-efficient PDC bit in the 2 nd spudding, optimizing torque impacter + PDC bit in the 3 rd spudding, and optimizing loss prevention and control formula for drilling fluid. These technologies show an obvious effect from three aspects, for instance, ROP increasing by 37.4%, downhole accident ratio decreasing to 0.85% from 2.50%, and drilling cycle reducing to 37 d.
引文
[1]李爱军,刘志良,怡宝安.盆5油气田钻井液稳定井壁和减阻防卡配套技术[J].新疆石油科技,2005,15(4):14-18.
[2]邹灵站,李维轩,焦志栓,等.液力冲击工具在新疆玛湖地区提速应用[J].西部探矿工程,2017,29(2):30-32,36.
[3]李伟雄.浅谈如何提高金刚石钻头在钻探施工中的使用寿命[J].西部探矿工程,2016,28(9):68-70,73.
[4]蒋祖军,肖国益,李群生.川西深井提高钻井速度配套技术[J].石油钻探技术,2010,38(4):30-34.
[5]刘天科.东营凹陷中央隆起带北部深层钻井技术难点与对策[J].石油钻探技术,2011,39(3):77-80.
[6]吕晓平,李国兴,王震宇,等.扭力冲击器在鸭深1井志留系地层的试验应用[J].石油钻采工艺,2012,42(3):36-39.
[7]周祥林,张金成,张东清. TorkBuster扭力冲击器在元坝地区的试验应用[J].钻采工艺,2012,32(2):15-19.
[8]货爱民,杨海,耿波,等. AEDMAC/AM/AA两性共聚物降滤失剂的合成与性能[J].精细石油化工进展,2002,12(3):6-8.
[9]张红星.塔河油田复杂泥页岩地层防塌钻井液技术研究[D].华东:中国石油大学,2005.
[2]邹灵站,李维轩,焦志栓,等.液力冲击工具在新疆玛湖地区提速应用[J].西部探矿工程,2017,29(2):30-32,36.
[3]李伟雄.浅谈如何提高金刚石钻头在钻探施工中的使用寿命[J].西部探矿工程,2016,28(9):68-70,73.
[4]蒋祖军,肖国益,李群生.川西深井提高钻井速度配套技术[J].石油钻探技术,2010,38(4):30-34.
[5]刘天科.东营凹陷中央隆起带北部深层钻井技术难点与对策[J].石油钻探技术,2011,39(3):77-80.
[6]吕晓平,李国兴,王震宇,等.扭力冲击器在鸭深1井志留系地层的试验应用[J].石油钻采工艺,2012,42(3):36-39.
[7]周祥林,张金成,张东清. TorkBuster扭力冲击器在元坝地区的试验应用[J].钻采工艺,2012,32(2):15-19.
[8]货爱民,杨海,耿波,等. AEDMAC/AM/AA两性共聚物降滤失剂的合成与性能[J].精细石油化工进展,2002,12(3):6-8.
[9]张红星.塔河油田复杂泥页岩地层防塌钻井液技术研究[D].华东:中国石油大学,2005.