抑制油田采出水Ca~(2+)结垢技术研究
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摘要
CaCO_3结晶是油田注水管网和井筒的主要结垢类型,严重影响水驱效果。针对油田采出水在水质稳定阶段出现CaCO_3沉淀的情况,分别利用添加化学药剂和树脂软化技术来抑制CaCO_3结晶。通过对部分站膜过滤后的采出水进行取样实验,确定了当油田回注水油藏温度≤60℃时,可投加适宜阻垢剂,最佳阻垢剂选用HEDP;温度>60℃时可采取树脂交换技术,最佳树脂选用C100E,该树脂可较好的去除Ca~(2+)离子功能,去除率≥98%。这两种技术具有良好的可靠性,为控制油田注水水质提供了理论依据。
CaCO_3 crystal is the main scale of oilfield water injection pipe network and the shaft type, seriously affect the water flooding effect. Stable for oilfield produced water in water phase appear Ca CO_3 precipitation, respectively using adding chemical agents and resin softening technology to suppress Ca CO_3 crystals. Through to the part of the station after the membrane filtration produced water sampling experiment, determine when the oil field water flooding reservoir temperature 60℃ or less back, but adding the appropriate scale inhibitors, the best scale inhibitor choose HEDP; Can take when temperature 60℃ exchange of technology, the best choose C100 E resin, the resin can better remove Ca~(2+) ions function, removal rate of 98% or higher. These two technologies has good reliability, provides a theoretical basis for control of oilfield water injection water quality.
CaCO_3 crystal is the main scale of oilfield water injection pipe network and the shaft type, seriously affect the water flooding effect. Stable for oilfield produced water in water phase appear Ca CO_3 precipitation, respectively using adding chemical agents and resin softening technology to suppress Ca CO_3 crystals. Through to the part of the station after the membrane filtration produced water sampling experiment, determine when the oil field water flooding reservoir temperature 60℃ or less back, but adding the appropriate scale inhibitors, the best scale inhibitor choose HEDP; Can take when temperature 60℃ exchange of technology, the best choose C100 E resin, the resin can better remove Ca~(2+) ions function, removal rate of 98% or higher. These two technologies has good reliability, provides a theoretical basis for control of oilfield water injection water quality.
引文
[1]梁昌晶,李吉,李文江.电化学-吸附-交换技术降低油田采出水矿化度的室内实验研究[J].油气田地面工程,2017,36(12):41-45.
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[3]林永红,张继超,张本艳等.碎屑岩油藏注水水质推荐指标及分析方法:SY/T5329-2012[S].北京:国家能源局,2012:1-15.
[4]方树耿,李丽香,刘倩等.油田采出水水质不稳定机理研究[J].油气田地面工程,2018,37(04):21-24.
[2]荣伟,巩峰,刘钇池等.滤后采出水除铁技术研究[J].油气田地面工程,2018,37(01):18-22.
[3]林永红,张继超,张本艳等.碎屑岩油藏注水水质推荐指标及分析方法:SY/T5329-2012[S].北京:国家能源局,2012:1-15.
[4]方树耿,李丽香,刘倩等.油田采出水水质不稳定机理研究[J].油气田地面工程,2018,37(04):21-24.