胍胶自增稠支撑剂性能及其储层伤害性评价
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摘要
为大幅减少现有压裂液工艺配制和运输费用,实现在线配制携砂液,本文采用将胍胶细粉黏附在支撑剂颗粒外表面的方法制作了新型自增稠支撑剂,并以高温高矿化度油藏环境为实验条件,开展了该自增稠支撑剂性能评价及储层伤害性实验。研究表明,在温度高于80℃的情况下,与SZ36-1油田注入水、长庆油田注入水、大庆油田污水和大庆油田清水相比,由矿化度最高的大港油田注入水配制的胍胶增稠剂溶液增黏性最好,视黏度最高,储能模量最大,携砂能力最强。当砂比大于30%后,用大港油田注入水配制自增稠支撑剂悬浮时间小于20 s,沉降时间大于4 h。当自增稠支撑剂破胶剂加量为0.03%数5.0%时,破胶时间为14数2.5h。恒速实验中,随着岩心渗透率增大,滤失量逐渐升高,伤害率逐渐降低。恒压实验中,随着滤失压差的增大,滤失量逐渐增加,伤害率逐渐增加。该胍胶自增稠支撑剂可满足高温油藏压裂施工需求,具有广阔的应用前景。图5表6参20
In order to significantly reduce the preparation and transportation costs of existing fracturing fluid,and realize online preparation of sand-carrying fluid,a new type of self-thickening proppant was prepared by attaching guanidine gum powder onto the surface of proppant particles. Performance evaluation and reservoir damage experiments of the self-thickening proppant were carried out under experimental conditions of high-temperature and high-salinity reservoir environment. The results showed that under conditions of 80℃,compared with injection water of SZ36-1 oilfield,injection water of Changqing oilfield,sewage of Daqing oilfield and fresh water of Daqing oilfield,guanidine gum solution prepared by injection water of Dagang oilfield with the highest salinity had the best gel forming effect,the highest apparent viscosity,the largest energy storage modulus and the strongest sand carrying capacity. When the sand ratio was greater than 30%,the suspension time of the self-thickening proppant was less than 20 s and the settling time was greater than 4 h. When the dosage of the self-thickening proppant was 0.03%—5.0%,the gel breaking time was 14—2.5 h. In the constant velocity experiment,with the increase of core permeability,the filtration loss increased gradually and the damage rate decreased gradually. In the constant pressure experiment,with the increase of the filtration pressure difference,the filtration amount and the injury rate gradually increased. The self-thickening proppant could meet the need of fracturing construction in high-temperature and high-salinity reservoir,and had a a broad application prospect.
In order to significantly reduce the preparation and transportation costs of existing fracturing fluid,and realize online preparation of sand-carrying fluid,a new type of self-thickening proppant was prepared by attaching guanidine gum powder onto the surface of proppant particles. Performance evaluation and reservoir damage experiments of the self-thickening proppant were carried out under experimental conditions of high-temperature and high-salinity reservoir environment. The results showed that under conditions of 80℃,compared with injection water of SZ36-1 oilfield,injection water of Changqing oilfield,sewage of Daqing oilfield and fresh water of Daqing oilfield,guanidine gum solution prepared by injection water of Dagang oilfield with the highest salinity had the best gel forming effect,the highest apparent viscosity,the largest energy storage modulus and the strongest sand carrying capacity. When the sand ratio was greater than 30%,the suspension time of the self-thickening proppant was less than 20 s and the settling time was greater than 4 h. When the dosage of the self-thickening proppant was 0.03%—5.0%,the gel breaking time was 14—2.5 h. In the constant velocity experiment,with the increase of core permeability,the filtration loss increased gradually and the damage rate decreased gradually. In the constant pressure experiment,with the increase of the filtration pressure difference,the filtration amount and the injury rate gradually increased. The self-thickening proppant could meet the need of fracturing construction in high-temperature and high-salinity reservoir,and had a a broad application prospect.
引文
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[15]张伟民,李宗田,李庆松,等.高强度低密度树脂覆膜陶粒研究[J].油田化学,2013,30(2):189-220.
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[19]卢祥国,高振环,闫文华,等.人造岩心渗透率影响因素试验研究[J].大庆石油地质与开发,1994,13(4):53-55.
[20]卢祥国,宋合龙,王景盛,等.石英砂环氧树脂胶结非均质模型制作方法:ZL200510063665.8[P]. 2005-09-07.
[2]杨浩珑,李龙,向祖平,等.新型Gemini表面活性剂复合清洁压裂液体系[J].石油钻采工艺,2017,39(5):617-622.
[3]张贵才,申金伟,张旋,等.新型压裂液对阜东斜坡区头屯河地层伤害研究[J].特种油气藏,2014,21(3):124-127.
[4]贾帅,崔伟香,杨江,等.新型超分子压裂液的流变性能研究及应用[J].油气地质与采收率,2016,23(5):83-87.
[5]李志臻,杨旭,涂莹红,等.一种聚合物压裂液稠化剂的性能研究及应用[J].钻井液与完井液,2015,32(5):78-82.
[6]徐克彬,任勇强,王中泽,等.一种基于阳离子稠化剂的高抗盐压裂液研究及应用[J].钻井液与完井液,2017,34(3):99-104.
[7]刘建坤,蒋廷学,万有余,等.致密砂岩薄层压裂工艺技术研究及应用[J].岩性油气藏,2018,30(1):165-172.
[8]郭建春,王世彬,伍林.超高温改性瓜胶压裂液性能研究与应用[J].油田化学,2011,28(2):201-205.
[9]张玉广,张浩,王贤君,等.新型超高温压裂液的流变性能[J].中国石油大学学报(自然科学版),2012,36(1):165-169.
[10]张应安,刘光玉,周学平,等.新型羧甲基胍胶超高温压裂液在松辽盆地南部深层火山岩气井的应用[J].中国石油勘探,2009,14(4):70-73.
[11]田小让,吴伯麟.一种耐酸陶粒压裂支撑剂的制备方法及耐酸机理的研究[J].材料导报,2008,8(22):215-216.
[12]智勤功,李鹏,陈刚,等.多轮次蒸汽吞吐井多层覆膜石英砂的研究及应用[J].石油钻采工艺,2011,33(5):86-89.
[13]李建国,敖立敏,吴壮坤.覆膜砂压裂改造技术在腰英台油田的应用[J].特种油气藏,2009,16(5):94-96.
[14]张龙胜,秦升益,雷林,等.新型自悬浮支撑剂性能评价与现场应用[J].石油钻探技术,2016,44(3):105-108.
[15]张伟民,李宗田,李庆松,等.高强度低密度树脂覆膜陶粒研究[J].油田化学,2013,30(2):189-220.
[16]张伟民,陈丽,任国平.预固化树脂覆膜砂的研究[J].石油学报(石油加工),2006,22(2):75-80.
[17]张鑫,王展旭,汪庐山,等.膨胀型自悬浮支撑剂的制备及性能评价[J].油田化学,2017,34(3):449-455.
[18]高旺来,接金利,张为民.一种树脂覆膜砂支撑剂的研究及现场应用[J].油田化学,2006,23(1):39-41.
[19]卢祥国,高振环,闫文华,等.人造岩心渗透率影响因素试验研究[J].大庆石油地质与开发,1994,13(4):53-55.
[20]卢祥国,宋合龙,王景盛,等.石英砂环氧树脂胶结非均质模型制作方法:ZL200510063665.8[P]. 2005-09-07.