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石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS
压裂返排液不落地回收处理技术在苏单格气田的应用
杨博丽
中国石油川庆钻探长庆井下技术作业公司
2017
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10um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44649m”，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。
关键词苏里格气田致密气藏压裂返排液不落地回收
中图分类号：TE992
文献标志码：A
D0I：10.3969/i.issn.1007-3426.2017.05.020
Applicationof on-linerecyclingtechnologyonfracturing
flowbackinSuligegasfield
YangBoli
CCDC Changging Downhole Technology Company,Xi'an,ShaanxiChina
Abstract: With the in-depth exploration and development, horizontal well technology , volume fracturing technology,mixing water fracturing, and factory fracturing have been large-scale popularized and applied in Sulige gas field . These fracturing technologies use large amounts of sand and fracturing fluid, resulting in dramatic increase of fracturing flowback fluid . In particular , after the implementation of the new environmental laws, conventional sewage impermeable pits are prohibited. It is urgent to study and develop the non-landing flowback processing technology to achieve fast and efficient recycling. This article introduced the fracturing flowback recycling technology applied in Sulige gas field. Considering fracturing flowback fluid that often contains natural gas , fracturing sand and other solid particles , and known for elevated pressure and difficult to separate, on.line continuous processing technology on fracturing flowback fluid was optimized , which was composed of pipeline buck control module,high-pressure degassing module, low pressure degassing and desanding module, and fine filter module. These modules were filtered through the finest lO μm filter to obtain the pure fracturing flowback fluid . After further chemical treatment, thickener was added for the next fracturing operation . The reusing ratio of flowback fluid could attain
项目来源：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)。
作者简杨博丽（1980一），女，工程师，2003年7月毕业于中国地质大学（北京)石油工程专业，工学学士，现就职于在中国石油川庆钻探长灰矫带技术作业公司，主要从事油气田环保技术研究工作。E-mail:yangbol@cnpc.com.cn