“水质调节-絮凝-O_3氧化”工艺处理胍胶压裂返排液及回用技术
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摘要
基于对延长油田某油井的胍胶压裂返排液的水质特性分析,采用"水质调节-絮凝-O3氧化"工艺对该压裂返排液进行处理,通过实验探索各工艺参数对处理效果的影响,并考察了处理后返排液回配滑溜水压裂液的性能。先将压裂返排液的pH值调至9.0,然后加入800 mg/L絮凝剂IF-A和1.0 mg/L助凝剂FA-B,再在通臭氧量30 mL/min处理500 mL返排液的情形下通气处理40 min。处理后水质呈无色、清澈透明状,SS含量小于3.00mg/L,Fe离子含量0.5 mg/L以下,黏度降至1.28 mPa·s,细菌含量低。用处理液回配滑溜水压裂液的各项性能与用自来水配制的滑溜水压裂液性能相近,符合DB.61/T 575—2013《压裂用滑溜水体系》标准,满足滑溜水压裂液配制用水要求。图3表2参11
Based on the analysis of the water quality characteristics of the guar gum fracturing flow-back fluid(GGFFBF)from a certain oil well in Yanchang oilfield,the process of water quality regulation-flocculation-O_3 oxidation was carried out to treat the GGFFBF and the treated GGFFBF was reused to prepare the slick water fracturing fluid. The effects of various process parameters on the treatment effect were explored. The results showed that when adjusting the pH value of the 500 mL GGFFBF to 9.0 and adding 800 mg/L flocculant IF-A and 1.0 mg/L coagulant FA-B,and then pumping O_3 for 40 min at a speed of 30 mL/min,the treated GGFFBF was colorless,clear and transparent,and the water quality was good. The SS content was less than 3.0 mg/L,the Fe ion content was below 0.5 mg/L,the viscosity was reduced to 1.28 mPa·s,and the bacterial content was low. The slick water fracturing fluid was prepared with the treated GGFFBF,and the performance of the slick water fracturing fluid was similar to that of the slick water fracturing fluid prepared with tap water,according with DB.61/T 575—2013 standard. The treated GGFFBF met the requirements for water preparation for slick water fracturing fluid.
Based on the analysis of the water quality characteristics of the guar gum fracturing flow-back fluid(GGFFBF)from a certain oil well in Yanchang oilfield,the process of water quality regulation-flocculation-O_3 oxidation was carried out to treat the GGFFBF and the treated GGFFBF was reused to prepare the slick water fracturing fluid. The effects of various process parameters on the treatment effect were explored. The results showed that when adjusting the pH value of the 500 mL GGFFBF to 9.0 and adding 800 mg/L flocculant IF-A and 1.0 mg/L coagulant FA-B,and then pumping O_3 for 40 min at a speed of 30 mL/min,the treated GGFFBF was colorless,clear and transparent,and the water quality was good. The SS content was less than 3.0 mg/L,the Fe ion content was below 0.5 mg/L,the viscosity was reduced to 1.28 mPa·s,and the bacterial content was low. The slick water fracturing fluid was prepared with the treated GGFFBF,and the performance of the slick water fracturing fluid was similar to that of the slick water fracturing fluid prepared with tap water,according with DB.61/T 575—2013 standard. The treated GGFFBF met the requirements for water preparation for slick water fracturing fluid.
引文
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[11]冀忠伦,周立辉,赵敏,等.臭氧催化氧化处理压裂废液的实验研究[J].环境工程,2011(s1):117-119.
[2]范红良.国外页岩气压裂返排液处理新技术综述[J].资源节约与环保,2016(4):16-16.
[3]刘小建,JOHN C.高级氧化技术在压裂返排液深度处理中的应用[J].油气田环境保护,2014,24(6):57-59.
[4]林孟雄,杜远丽,陈坤,等.复合催化氧化技术对油气田压裂返排液的处理研究[J].环境科学与管理,2007,32(8):115-118.
[5]高燕,赵建平,纪冬冬.二级氧化-混凝法实现压裂返排液重复利用[J].水处理技术,2015(11):115-118.
[6] SY/T5329—2012,碎屑岩油藏注水水质推荐指标及分析方法[S].北京:石油工业出版社,2012.
[7] DB.61/T 575—2013,压裂用滑溜水体系[S].陕西:陕西省质量技术监督局,2013.
[8]谢起航,焦淑倩,闫梦洋,等.页岩气返排水处理新工艺研究[J].武汉理工大学学报,2015,37(6):81-86.
[9]陈琳,刘国光,吕文英.臭氧氧化技术发展前瞻[J].环境科学与技术. 2004,27(z1):143-145.
[10]许剑,李文权.页岩气压裂返排液处理工艺试验研究[J].石油机械,2013,41(11):110-114.
[11]冀忠伦,周立辉,赵敏,等.臭氧催化氧化处理压裂废液的实验研究[J].环境工程,2011(s1):117-119.