压裂返排液不落地回收处理技术在苏里格气田的应用

发布时间：2018-01-10 06:08

本文关键词：压裂返排液不落地回收处理技术在苏里格气田的应用　出处：《石油与天然气化工》2017年05期 　论文类型：期刊论文

【摘要】：随着苏里格气田水平井改造、体积压裂工艺、混合水压裂方式、工厂化作业等实现推广应用,返排液量剧增,尤其是新环保法实施后,不允许挖建防渗排污坑,环保形势异常严峻。急需研发返排液不落地回收处理技术,实现其重复再利用。针对返排液中含有大量天然气、压裂砂、悬浮物,压力高、分离处理难度大等难题,优化形成了压裂返排液在线连续处理技术,主要包括管线节流控制模块、高压除气模块、低压除气除砂模块、精细化过滤模块和浓残液蒸发模块,经过10μm精细过滤,得到纯净的压裂返排液。进一步化学处理后,添加稠化剂等重新配液用于下次压裂施工,重复利用率达到90%以上,少量浓残液采用蒸发处理。现场先导性试验23井次,回收液体44 649m~3,取得了显著的社会、经济效益,为国内压裂返排液环保处理技术的创新发展提供了借鉴。
[Abstract]:With the application of horizontal well reconstruction, volume fracturing technology, mixed water fracturing method and factory operation in Sulige gas field, the amount of back drainage fluid is greatly increased, especially after the implementation of the new environmental protection method, it is not allowed to dig and build seepage prevention and discharge pits. The environmental protection situation is extremely serious. It is urgent to research and develop the technology of recovery treatment without falling back liquid to realize its reuse. In view of the large amount of natural gas, fracturing sand, suspended matter and high pressure in the back discharge liquid. The difficulty of separation and treatment is very difficult, so the on-line continuous treatment technology of fracturing fluid is optimized, which includes pipeline throttling control module, high-pressure degassing module, low-pressure degassing and sand removal module. After 10 渭 m fine filtration, pure fracturing fluid was obtained. After further chemical treatment, thickening agent was added for the next fracturing operation. The reuse rate is over 90%, a small amount of concentrated residual liquid is treated by evaporation, 23 wells of pilot test are carried out, and 44,649 mm3 of liquid is recovered, and remarkable social and economic benefits have been obtained. It provides a reference for the innovation and development of environmental protection treatment technology for fracturing and drainage fluids in China.
【作者单位】：中国石油川庆钻探长庆井下技术作业公司;
【基金】：中国石油集团公司2014年工程技术统筹项目“压裂返排液处理与再利用技术研究与应用”(2014T-003-007)
【分类号】：TE377;X741
【正文快照】： 鄂尔多斯盆地苏里格气田储层空气渗透率介于(0.1~1.0)×10-3μm2范围,与国外致密气相比,压力系数低,属于典型的低压致密气藏[1]。长庆油田经过近年来的勘探开发探索与实践,取得了一系列的进展,水平井改造、体积压裂工艺、混合水压裂方式、工厂化作业等已规模化推广应用,大幅度

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