压裂返排液回注处理及可行性评价
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摘要
为了充分利用水资源,压裂返排液多在处理后回注。为了确保回注效果,需要进行处理后压裂返排液的回注可行性评价。采用化学氧化与絮凝处理方式对压裂返排液进行了处理,通过对水质离子含量、混合水结垢量及配伍性、黏土膨胀率、储层伤害率的分析研究,对其回注可行性进行了评价。结果表明:压裂返排液经过"氧化-絮凝"处理后,压裂返排液的悬浮物质量浓度为1.6 mg/L、含油量低于1.0 mg/L,黏土在处理后压裂返排液中的防膨率为92.68%;处理后压裂返排液与储层产出水混合体积比为3∶7时,结垢量低于72 mg/L;当处理后水含油量、悬浮物质量浓度低于6.00 mg/L时,对储层渗透率的伤害率低于20%。
Fracturing flow-back fluid is mostly reinjected after treatment in order to make full use of water resources. In order to ensure the effect of reinjection, the feasibility evaluation of reinjection of fracturing flow-back fluid after treatment is needed. In this work, fracturing flow-back fluid was treated by chemical oxidation and flocculation process. Its feasibility of reinjection was evaluated through the analysis of ion content, scaling amount, compatibility, clay swelling rate and reservoir damage rate of mixed water. The results show that after the treatment of "oxidation-flocculation", the suspended matter mass concentration of fracturing flow-back fluid is 1.6 mg/L, the oil content is less than 1.0 mg/L, and the anti-swelling rate of clay in treated fracturing flow-back fluid is 92.68%. When the volume ratio of fracturing flow-back fluid and reservoir water is 3 ∶7, the scaling amount is less than 72 mg/L. When the oil content and suspended matter mass concentration of treated water are less than 6.00 mg/L, the damage rate to reservoir permeability is less than 20%.
Fracturing flow-back fluid is mostly reinjected after treatment in order to make full use of water resources. In order to ensure the effect of reinjection, the feasibility evaluation of reinjection of fracturing flow-back fluid after treatment is needed. In this work, fracturing flow-back fluid was treated by chemical oxidation and flocculation process. Its feasibility of reinjection was evaluated through the analysis of ion content, scaling amount, compatibility, clay swelling rate and reservoir damage rate of mixed water. The results show that after the treatment of "oxidation-flocculation", the suspended matter mass concentration of fracturing flow-back fluid is 1.6 mg/L, the oil content is less than 1.0 mg/L, and the anti-swelling rate of clay in treated fracturing flow-back fluid is 92.68%. When the volume ratio of fracturing flow-back fluid and reservoir water is 3 ∶7, the scaling amount is less than 72 mg/L. When the oil content and suspended matter mass concentration of treated water are less than 6.00 mg/L, the damage rate to reservoir permeability is less than 20%.
引文
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[18]刘立宏,陈江明,刘通义,等.东北油气田压裂液返排液重复利用技术[J].钻井液与完井液,2015,32(4):92-95.
[19]王维,费庆志,孙承林,等.混凝-芬顿氧化处理油田含油污水[J].现代化工,2015(10):105-109.
[20]范玉华.PAC絮凝效果实验及分析[J].内蒙古石油化工,2009(21):48-49.
[21]舒勇,贾耀勤,赵刚桩.桩西油田回注污水对储层损害的室内实验研究[J].油田化学,2003,20(2):129-132.
[22]ALBA C P,ONISHHI V C,RAQUEL S D,et al.Optimal pretreatment system of flowback water from shale gas production[J].Industrial&Engineering Chemistry Research,2017,56(15):4386-4398.
[23]H·范·奥尔芬.黏土胶体化学导论[M].北京:农业出版社,1979:114-115.
[24]BAEBOT E,VIDIC N S,GREGORY K B,et al.Spatial and temporal correlation of water quality parameters of produced waters from devonian-age shale following hydraulic fracturing[J].Environmental Science&Technology,2013,47(6):2562-2569.
[2]马云,何顺安,侯亚龙.油田废压裂液的危害及其处理技术研究进展[J].石油化工应用,2009(8):1-3.
[3]HARKNESS J S,DWYER G S,WARNER N R,et al.Iodide,bromide,and ammonium in hydraulic fracturing and oil and gas wastewaters:environmental implications.[J].Environmental Science&Technology,2015,49(3):1955-1963.
[4]屈撑囤.油气田环境保护概论[M].北京:石油工业出版社,2009:134-135.
[5]胡雪滨,徐永高.油田注入水引起储层伤害的试验评价[J].江汉石油学院学报,2002,24(3):53-55.
[6]严启团,刘素民,陈彩红.油田注水开发过程中储层伤害的微观机理[J].电子显微学报,2003,22(6):608-609.
[7]杨志刚,魏彦林,吕雷,等.页岩气压裂返排液回用处理技术研究与应用[J].天然气工业,2015(5):131-137.
[8]WILKINS R,MENEFFEE A H,CLARENS A F.Environmental life cycle analysis of water and CO2-based fracturing fluids used in unconventional gas production[J].Environmental Science&Technology,2016,50(23):13134-13141.
[9]樊炜.压裂返排液处理技术研究[J].化工技术与开发,2016(3):55-56.
[10]严志虎,戴彩丽,赵明伟,等.压裂返排液处理技术研究与应用进展[J].油田化学,2015(3):444-448.
[11]陆争光.油气田压裂返排液处理技术探讨[J].环境科学与管理,2016(5):104-107.
[12]GREGORY K B,VIDIC R D,DZOMBAK D A.Water management challenges associated with the production of shale gas by hydraulic fracturing[J].Elements,2011,7(3):181-186.
[13]边伟,刘乃瑞,李欣.硼聚硅酸铝铁絮凝剂处理油气田采出水的研究[J].化学工程,2012,40(8):14-18.
[14]王建国,何芳,邸昊,等.电磁场对结垢过程中电导率及p H值的影响[J].化学工程,2013,41(1):32-36.
[15]程晓刚,郑祎琳,王建川,等.致密油水平井压裂返排液回注处理技术研究与应用[J].油气井测试,2015(1):65-66.
[16]OLSSON O,WEICHGREBE D,ROSENWI-NKEL K H.Hydraulic fracturing wastewater in Germany:Composition,treatment,concerns[J].Environmental Earth Sciences,2013,70(8):3895-3906.
[17]刘丝雨,屈撑囤,杨鹏辉,等.陕北低渗透油田采出水与清水回注可行性研究[J].化学工程,2015,43(6):6-9.
[18]刘立宏,陈江明,刘通义,等.东北油气田压裂液返排液重复利用技术[J].钻井液与完井液,2015,32(4):92-95.
[19]王维,费庆志,孙承林,等.混凝-芬顿氧化处理油田含油污水[J].现代化工,2015(10):105-109.
[20]范玉华.PAC絮凝效果实验及分析[J].内蒙古石油化工,2009(21):48-49.
[21]舒勇,贾耀勤,赵刚桩.桩西油田回注污水对储层损害的室内实验研究[J].油田化学,2003,20(2):129-132.
[22]ALBA C P,ONISHHI V C,RAQUEL S D,et al.Optimal pretreatment system of flowback water from shale gas production[J].Industrial&Engineering Chemistry Research,2017,56(15):4386-4398.
[23]H·范·奥尔芬.黏土胶体化学导论[M].北京:农业出版社,1979:114-115.
[24]BAEBOT E,VIDIC N S,GREGORY K B,et al.Spatial and temporal correlation of water quality parameters of produced waters from devonian-age shale following hydraulic fracturing[J].Environmental Science&Technology,2013,47(6):2562-2569.