古城油田超高分子量聚合物驱分析与应用
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摘要
为提高古城泌125区块驱油效率,针对该区块油藏条件(油层温度40.9℃、地下平均原油黏度652.7 mPa·s)进行了剩余油潜力分析,提出超高分聚合物+井网调整的技术路线。研究结果表明,该区平面上45.6%和54.4%剩余储量分别分布在含水大于90%和含水小于90%的区域,纵向上井间及井网控制差区域剩余油饱和度达60%甚至更高,是下步聚合物驱的挖潜对象。井网调整后液流方向改变率36.8%,预测超高分子量聚合物驱比水驱可提高采收率5.9%,最终增产原油9.16×10~4t。超高分子量聚合物CGF-1具有较好的黏弹性、长期热稳定性、抗剪切性和注入性。当聚合物质量浓度为2500 mg/L、注入量为0.6 PV时,均质岩心水驱后采收率增幅可达21.1%。在泌125区现场22口注入井进行先导试验,取得了良好的增油降水效果。图5表4参17
In order to improve the oil displacement efficiency of B125 block of Gucheng oilfield,the residual oil potential analysis was carried out according to the reservoir conditions such as 40.9℃ reservoir temperature and 652.7 mPa·s average viscosity of underground crude oil,and the technical route of ultra-high molecular weight polymer and well pattern adjustment was proposed.The results showed that the remaining reserves of 45.6% and 54.4% distributed in the areas with water content greater than 90% and water content less than 90%,respectively. The remaining oil saturation was 60% even higher in the zone with poor vertical spacing and pattern control,which was the potential target for the next step of polymer flooding. The change rate of fluid flow direction was 36.8% after well pattern adjustment. It was predicted that the ultrahigh molecular weight polymer flooding could improve the oil recovery by 5.9% compared with water flooding,and eventually increase the production of crude oil by 9.16×10~4 t. The ultrahigh molecular weight polymer CGF-1 had good viscoelasticity,long-term thermal stability,shear resistance and injectivity. When the mass concentration of polymer was 2500 mg/L and the injection volume was 0.6 PV,the recovery rate of homogeneous core increased by 21.1% after water flooding. Pilot tests were carried out on 22 injection wells in B125 area,and good effects were obtained in increasing oil and precipitation.
In order to improve the oil displacement efficiency of B125 block of Gucheng oilfield,the residual oil potential analysis was carried out according to the reservoir conditions such as 40.9℃ reservoir temperature and 652.7 mPa·s average viscosity of underground crude oil,and the technical route of ultra-high molecular weight polymer and well pattern adjustment was proposed.The results showed that the remaining reserves of 45.6% and 54.4% distributed in the areas with water content greater than 90% and water content less than 90%,respectively. The remaining oil saturation was 60% even higher in the zone with poor vertical spacing and pattern control,which was the potential target for the next step of polymer flooding. The change rate of fluid flow direction was 36.8% after well pattern adjustment. It was predicted that the ultrahigh molecular weight polymer flooding could improve the oil recovery by 5.9% compared with water flooding,and eventually increase the production of crude oil by 9.16×10~4 t. The ultrahigh molecular weight polymer CGF-1 had good viscoelasticity,long-term thermal stability,shear resistance and injectivity. When the mass concentration of polymer was 2500 mg/L and the injection volume was 0.6 PV,the recovery rate of homogeneous core increased by 21.1% after water flooding. Pilot tests were carried out on 22 injection wells in B125 area,and good effects were obtained in increasing oil and precipitation.
引文
[1]裴海华,张贵才,葛际江,等.化学驱提高普通稠油采收率的研究进展[J].油田化学,2010,27(3):350-356.
[2]丁保东,张贵才,葛际江,等.普通稠油化学驱的研究进展[J].西安石油大学学报(自然科学版),2011,26(3):52-58.
[3]裴海华,张贵才,葛际江,等.化学驱提高普通稠油采收率的研究进展[J].油田化学,2010,27(3):350-356.
[4]曹绪龙,李振泉,宫厚健,等.加拿大稠油聚合物驱研究进展及应用[J].油田化学,2015,32(3):461-467.
[5]涂兴万,陈林媛,莫文丽,等.高含水期复杂断块油藏剩余油分布及挖潜[J].西南石油学院学报,2004,26(1):39-42.
[6]王平,姜瑞忠,王公昌,等.高含水期水驱状况影响因素数值模拟研究[J].天然气与石油,2012,30(4):36-38.
[7]高双华,张连锋,崔灿,等.普通稠油油藏聚合物驱合理井距研究[J].石油地质与工程,2015,29(4):87-89
[8]许家峰,程林送,李春涛,等.普通稠油超高分子量聚合物驱适应性评价[J].石油钻采工艺,2007,29(3):63-66.
[9]王刚,孙刚,刘洪兵.超高分子量聚合物性能评价方法研究[J].大庆石油地质与开发,2001,20(2):101-103.
[10]韩杰,孔柏岭,吕小华.不同油藏条件下HPAM水解度与黏度变化规律[J].油田化学,2006,23(3):235-238.
[11]黎锡瑜.双河油田提高聚合物驱高温稳定性的方法研究[J].油田化学,2017,34(4):663-667.
[12]付美龙,周克厚,赵林.聚合物驱溶液中溶解氧对聚合物稳定性的影响[J].西南石油学院学报,1999,21(1):71-73.
[13]王德民,程杰成,杨清彦.粘弹性聚合物溶液能够提高岩心的微观驱油效率[J].石油学报,2000,21(5):45-51.
[14]徐辉,孙秀芝,韩玉贵,等.超高分子量聚合物性能评价及微观结构研究[J].石油钻探技术,2013,41(3):114-118.
[15]刘洪兵,周正祥,廖广志.超高相对分子质量聚合物驱油效果影响因素分析[J].大庆石油地质与开发,2002,21(6):48-50.
[16]宋考平,杨二龙,王锦梅,等.聚合物驱提高驱油效率机理及驱油效果分析[J].石油学报,2004,25(3):71-74.
[17]周远彬,卢建平,李勇强,等.胜佗油田普通稠油油藏聚合物驱试验效果评价[J].河南石油,2004,18(2):29-31.
[2]丁保东,张贵才,葛际江,等.普通稠油化学驱的研究进展[J].西安石油大学学报(自然科学版),2011,26(3):52-58.
[3]裴海华,张贵才,葛际江,等.化学驱提高普通稠油采收率的研究进展[J].油田化学,2010,27(3):350-356.
[4]曹绪龙,李振泉,宫厚健,等.加拿大稠油聚合物驱研究进展及应用[J].油田化学,2015,32(3):461-467.
[5]涂兴万,陈林媛,莫文丽,等.高含水期复杂断块油藏剩余油分布及挖潜[J].西南石油学院学报,2004,26(1):39-42.
[6]王平,姜瑞忠,王公昌,等.高含水期水驱状况影响因素数值模拟研究[J].天然气与石油,2012,30(4):36-38.
[7]高双华,张连锋,崔灿,等.普通稠油油藏聚合物驱合理井距研究[J].石油地质与工程,2015,29(4):87-89
[8]许家峰,程林送,李春涛,等.普通稠油超高分子量聚合物驱适应性评价[J].石油钻采工艺,2007,29(3):63-66.
[9]王刚,孙刚,刘洪兵.超高分子量聚合物性能评价方法研究[J].大庆石油地质与开发,2001,20(2):101-103.
[10]韩杰,孔柏岭,吕小华.不同油藏条件下HPAM水解度与黏度变化规律[J].油田化学,2006,23(3):235-238.
[11]黎锡瑜.双河油田提高聚合物驱高温稳定性的方法研究[J].油田化学,2017,34(4):663-667.
[12]付美龙,周克厚,赵林.聚合物驱溶液中溶解氧对聚合物稳定性的影响[J].西南石油学院学报,1999,21(1):71-73.
[13]王德民,程杰成,杨清彦.粘弹性聚合物溶液能够提高岩心的微观驱油效率[J].石油学报,2000,21(5):45-51.
[14]徐辉,孙秀芝,韩玉贵,等.超高分子量聚合物性能评价及微观结构研究[J].石油钻探技术,2013,41(3):114-118.
[15]刘洪兵,周正祥,廖广志.超高相对分子质量聚合物驱油效果影响因素分析[J].大庆石油地质与开发,2002,21(6):48-50.
[16]宋考平,杨二龙,王锦梅,等.聚合物驱提高驱油效率机理及驱油效果分析[J].石油学报,2004,25(3):71-74.
[17]周远彬,卢建平,李勇强,等.胜佗油田普通稠油油藏聚合物驱试验效果评价[J].河南石油,2004,18(2):29-31.
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