摘要
元坝124井是元坝地区的一口重点探井。由于元坝地区陆相地层石英含量高、研磨性强、可钻性差,导致单只钻头进尺少,机械钻速低,钻井成本高。为此,首先评价了元坝地区前期的钻井提速技术:气体钻井技术、"孕镶金刚石钻头+涡轮钻具"复合钻井技术、控压钻井技术和"PDC钻头+螺杆钻具"复合钻井技术。并在此基础上,根据元坝124井所要钻遇地层的特征,制定了该井的钻井提速配套技术方案:一开采用气体钻井技术,二开采用"孕镶金刚石钻头+涡轮钻具"复合钻井技术,三开采用"PDC钻头+螺杆钻具"复合钻井技术。实钻表明,该钻井提速配套技术方案可行,能够大幅提高机械钻速,缩短钻井周期。该井平均机械钻速2.80m/h,钻井周期253.84d,是目前元坝地区钻井周期最短的一口井。
Well Yuanba 124 is a key exploration well in Yuanba Area.The bit footage and rate of penetration is low,and drilling cost is high because of high quartz content,high abrasivity and low drillability of continental formation.Therefore,the fast drilling technologies including air drilling,impregnated bit with turbine motor,managed pressure drilling and PDC bit with PDM were applied and evaluated.On the basis of evaluation results,an integrated drilling program was developed considering formation characteristics.Air drilling was used in first spud;impregnated bit and turbine motor was used in second spud;and PDC bit with PDM was used in third spud.The drilling results showed that this program was feasible.The ROP was increased significantly and the drilling cycle was reduced.The average ROP was 2.80 m/h,and the drilling cycle was 253.84 d.Well Yuanba 124 set the record of shortest drilling cycle in Yuanba Area.
出处
《石油钻探技术》
CAS
北大核心
2011年第6期23-26,共4页
Petroleum Drilling Techniques