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东海深层致密气藏爆燃压裂技术优化
孙林,郭士生,熊培祺,李旭光
0
(1.中海油能源发展股份有限公司工程技术分公司,天津300452;2.中海石油(中国)有限公司,上海200335)
摘要:
为解决东海深层致密气藏改造增产难题,对该类气藏进行爆燃压裂技术优化,优选更具耐温性的高氯酸钾为固体氧化剂,耐高温环氧树脂为高分子粘合剂,再复合耐高温橡胶、敏感剂、固化剂等材料,采用淤浆浇注工艺,研制出耐高温火药,经检测,该火药可耐200 ℃高温达48 h。根据气井非达西流动产能公式和爆燃压裂后多裂缝模型,推导了爆燃压裂后气井产能和增产倍比模型,进行了气井产能与裂缝参数相关性分析,并优选了内置式和袖套式2种火药在不同火药参数下的方案。形成了TCP射孔-HEGF爆燃压裂-APR测试联作一体化管柱,节省50%起下管柱的作业时间,减小储层伤害,提高井下作业管柱安全性。
关键词:  致密气藏  爆燃压裂  内置式火药  袖套式火药  深层  东海
DOI:10.13673/j.cnki.cn37-1359/te.2019.04.018
基金项目:中国海洋石油集团有限公司科技项目“爆燃压裂酸化储层改造技术研究与应用”(CNOOC-KJ135KJXM NFGJ2017-04),中国海洋石油集团有限公司重大专项“南海东部海域低孔低渗油气藏勘探开发关键技术研究与实践”(CNOOC-KJ125 ZDXM07 LTD)。
Optimization of high-energy gas fracturing technology for deep tight gas reservoirs in East China Sea
SUN Lin,GUO Shisheng,XIONG Peiqi,LI Xuguang
(1.CNOOC EnerTech-Drilling & Production Co.,Ltd.,Tianjin City,300452,China;2.China National Offshore Oil Corporation,Ltd.,Shanghai City,200335,China)
Abstract:
An optimized high-energy gas fracturing technology was proposed to solve the difficulty on the stimulation of the deep tight gas reservoirs in the East China Sea. Temperature-resistant potassium perchlorate was preferred as the solid oxidant and temperature-resistant epoxy resin was used as the polymer binder. Addition with the use of high temperature-resistant rubber,sensitive agent,curing agent and other materials,the high temperature-resistant propellant was made by using a slurry casting process. The propellant could withstand a high temperature about 200 ℃ for 48 hours. According to the non-Darcy gas flow productivity formula and the multi-crack model after high-energy gas fracturing,the gas well productivity and production-increasing ratio model after the fracturing were derived. The correlation between the gas well productivity and fracturing parameters was analyzed. Fracturing mode with both built-in and sleeve-type propellant were optimized for different propellant parameters. The“TCP-HEGF-APR test”integration process technology has been formed innovatively. It greatly saves 50% working time,reduces reservoir damage and improves the safety of the downhole work with string tools.
Key words:  tight gas reservoir  high-energy gas fracturing  built-in propellant  sleeve-type propellant  deep layer  East China Sea

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