摘要
库车山前储层埋藏深、岩石抗压强度高、研磨性强,导致储层钻井效率低、周期长。为此,开展了储层岩石抗压强度和可钻性研究。研究中,克深气田-大北气田储层巴二、巴三段岩石平均单轴抗压强度大于125 MPa,可钻性级值大于12。根据储层岩石特征优选高速涡轮配合孕镶钻头和ONYX360钻头这2种高效破岩技术,开展现场提速试验,并分层段制定了储层提速技术方案。现场应用结果表明:储层钻井提速技术的应用大幅提高了储层钻井效率,与2013年相比,2016年完井储层钻头平均进尺和机械钻速分别提高50.0%和43.9%,钻井周期缩短了32.5%,钻头用量减少了44.6%。该技术对加快库车山前天然气勘探开发和产能建设具有重要意义。
The reservoirs of Kuqa foreland features deep burial depth, high compressive strength of rock and high abrasiveness, resulting in low drilling efficiency and long drilling cycle in reservoir. To address the issue, re-searches on reservoir rock compressive strength and drillability have been conducted. The results show that, for the second and the third member of Bashijiqike formation in the Keshen-Dabei gas field, the average UCS of rock is higher than 125 MPa, and the drillability is higher than 12. Based on the characteristics of reservoir rock, two high-efficiency rock breaking technologies, the high RPM turbine with impregnated bit and ONYX360 bit were se-lected to carry out on-site ROP enhancement test. The technical schemes of ROP enhancement were developed for different well sections. The application results show that the ROP enhancement technology has greatly improved the reservoir drilling efficiency. Compared with that in 2013, the average drilling footage and penetration rate increase by 50. 0% and 43. 9%, respectively. The drilling cycle is shortened by 32. 5%. The amount of drill bit is reduced by 44. 6%.
出处
《石油机械》
2017年第12期1-6,共6页
China Petroleum Machinery
基金
国家科技重大专项"深井超深井井筒安全钻井技术与装备"(2016ZX05020-003)
