耿立军蔡金亮王晓鹏马立(.中海石油(中国)有限公司天津分公司， 天津 300459；.中海油能源发展股份有限公司工程技术分公司， 天津 300459)

渤海油田探井井身结构优化可行性研究

耿立军1蔡金亮1王晓鹏1马立2(1.中海石油(中国)有限公司天津分公司， 天津 300459；2.中海油能源发展股份有限公司工程技术分公司， 天津 300459)

在国际油价持续低位徘徊的大环境下，钻井成本控制也越来越严格。本文着眼于小井眼钻井技术，从井壁稳定性、固井质量、钻井工艺、套管校核、水力参数、摩阻扭矩等方面，分别论证渤海地区优化后的小井眼井代替常规经验井身结构的可行性。得出了小井眼井更有利于井壁稳定和提高机械钻速；满足固井质量要求；钻具组合及配套工具无需特别定制；水力参数设计满足要求；具有更小的摩阻扭矩值等结论。通过与常规井身结构井的对比分析，优化后的小井眼井极大降低了作业成本，可以在渤海地区逐步推广应用。

小井眼;探井;井身结构优化;降本增效

Abstract:In the general circumstances of international oil price which remains lows,the control of drilling cost is more and more strict. This article focuses on the technology of the slim hole drilling,From the wellbore stability,cementing quality,drilling process,casing check,the hydraulic parameters,friction torque and so on,All of them prove respectively that feasibility of that optimization of slim hole which which conventional experience well structure in Bohai area.In conclusion; Slim hole is more conducive to the stability of the borehole wall and improve the drilling speed,meet the requirements of cementing quality,drilling tools and supporting tools are not required to be customized; meet the requirements of the design of hydraulic parameters and smaller friction torque.By comparing with the conventional well structure,the optimized slim hole can greatly reduce the cost of operation,and can be widely popularize apply in Bohai area.

Keyword:Slim hole; Exploration well; Well structure optimization; lowering cost and improving ef fi ciency

0 引言

科学、安全的钻井和经济有效的开采是井身结构设计的重要前提，合理的井身结构设计可以很大程度上避免钻完井过程中发生复杂事故，保证作业安全快速的进行，从而缩短施工工期，降低工程作业成本。目前渤海采用的常用井身结构为：一、24”隔水管*17-1/2”井眼(13-3/8“套管)*12-1/4”井眼(9-5/8”套管)；二、24”隔水管*17-1/2”井眼(13-3/8”套管)*12-1/4”井眼(9-5/8”套管)*8-1/2”井眼(7”套管)；三、24”隔水管*17-1/2”井眼(13-3/8“套管)*8-1/2”井眼(7”套管)；此结构严格遵从API标准，较为成熟，也是目前国内应用最为广泛的井身结构。……