庆深气田深层钻完井配套技术

Matching Technology for Deep Drilling and Completion in Qingshen Gas Field

摘要:

自庆深气田徐深1井取得深层天然气勘探重大突破以来，大庆油田步入了油气勘探开发并举阶段。2004—2010年完成123口井，平均井深4118 m、钻井周期141 d，钻井技术水平较低。虽然开展提速技术攻关取得一定效果，但仍然不能满足天然气快速增储上产的需求，还存在着固井后井口带压问题，急需深入开展钻完井技术攻关。自2011年起，借鉴国内外深层提速技术成果，分开次、分层段针对岩性特点制定提速对策，通过优化井身结构、优选高效PDC钻头、实验并自研液动旋冲和涡轮等新型提速工具，大幅度提高了深井钻井技术水平，2011—2013年完成19口井，平均井深4075 m、同比缩短钻井周期48.6 d；针对井口带压问题，综合分析其产生因素，开展系列技术研究，形成了防气窜固井配套技术，为深层天然气快速增储上产提供了支持和保障。

Abstract:

Since the breakthrough of deep natral gas exploration in well 1 of Qingshen gas field, Daqing oilfield has stepped into the stage of both oil and gas exploration and development. For the low drilling technical level, only 123 wells were completed during 2004—2010 with average well depth 4118m and drilling cycle 141d. Since 2011, by using the experience of speed increasing technology for deep drilling both in China and abroad, and based on the rock features, the speed-raise countermeasures were worked out. By the well structure optimization, high-efficient PDC bits selection and independent-research on new tools, deep drilling level was greatly improved. During 2011—2013, 19 wells were completed with everage depth of 4075m, drilling cycle was shortened 48.6d. According to the existing well head pressure, the causes were analyzed with a series of technical research; the matching cementing technology of gas channeling prevention was formed to provide the support and guarantee to increase reserve and production of deep natural gas.