土库曼斯坦阿姆河右岸B区块钻井关键技术

Key Drilling Technologies in the Block B at the Right Bank of Amu Darya, Turkmenistan

张桂林

Zhang Guilin

中石化胜利石油工程有限公司技术装备处, 山东东营 257001

Department of Petroleum Technology and Equipment, Sinopec Shengli Oilfield Service Corporation, Dongying, Shandong, 257001, China

为了解决土库曼斯坦阿姆河右岸B区块钻井中因井喷、井漏以及卡钻事故造成大量井眼报废的钻井难题,在分析已钻井发生的事故案例的基础上,深入研究"次生高压气藏"、高压盐水层和高压气层对钻井安全的影响,跟踪研究新钻井出现的问题,通过11口井的钻井实践,形成了由井身结构设计、钻井液体系、井控装置配套和以"液量稳定"控压钻井方法为核心的钻井工艺等组成的阿姆河右岸B区块钻井关键技术。在B区块现场应用后,钻井成功率由原来的18.46%提高到100%。实践表明,该钻井关键技术能够保证土库曼斯坦阿姆河右岸B区块钻井施工的顺利进行,也可为其他类似区块安全钻井提供了借鉴。

In Block B at the right bank of Amu Darya, Turkmenistan, a great number of boreholes were abandoned due to blowout, lost circulation and pipe sticking during drilling. After analysis was conducted on the existing drilling accidents, further studies were carried out on the effect of"high-pressure secondary gas reservoirs", high-pressure saline aquifers and high-pressure gas reservoirs on the safety of drilling, a follow-up analysis was performed on the phenomenon occurred during new drilling operation. Based on drilling practice of 11 wells, key drilling technologies were developed in terms of casing program, drilling fluid system, well control device and "stable liquid volume" controlled pressure drilling technology. After they were applied in Block B, the success rate of drilling rose from 18.46% to 100%. It was shown that these key drilling technologies not only ensured smooth drilling in Block B at the right bank of Amu Darya, Turkmenistan, but also provided a technical reference for drilling in other blocks.

https://doi.org/10.11911/syztjs.201506001