水平井预置管柱完井与连续油管带底封分段压裂一体化技术

在大牛地气田致密气藏开发中，常规水平井预置管柱分段压裂为其主体技术，但该技术存在分级滑套逐级缩径、不能全部返出的分级球滞留井底的问题，不利于压后排水采气、地层测试及后期措施改造等作业。预置管柱与连续油管带底封压裂相结合的完井压裂工艺可以达到全通径的工程技术要求，通过压裂材料优选和压裂施工参数优化，在A井进行了现场试验，压后获得无阻流量6.07×104m3/d。同邻井应用效果对比来看，采用预置管柱完井与连续油管带底封分段压裂工艺施工效果明显好于固井完井压裂效果，与采用常规预置管柱裸眼封隔器压裂工艺效果持平，可进一步推广应用。

Preset string completion for horizontal wells and staged fracturing integrated technology of coiled tubing with bottom packer

The conventional horizontal well staged fracturing with preset pipe string is the main technology used for the development of tight gas reservoirs in Daniudi Gasfield. During its application, however, stepped sliding sleeves are faced with stepwise reducing and the grading balls which cannot be returned totally are detained at the bottom hole. And these problems are not favorable for drainage gas recovery after fracturing, formation testing and later stimulation. The completion and fracturing technology which combines the preset pipe string completion and the coiled tubing fracturing with bottom packer together can meet the engineering technology requirements of full bore. After fracturing material selection and fracturing operation parameter optimization, this technology was tested on site in Well A, whose absolute open flow after fracturing is 6.07×104m3/d. The test results were compared with the application results of its neighboring wells. It is indicated that preset string completion and staged fracturing with coiled tubing and bottom packer is much better than the cementing, completion and fracturing, and basically the same as the conventional fracturing technology with preset pipe string and open hole packer. Therefore, it can be popularized further.