二氧化碳无水压裂增产机理研究
发布时间：2018-12-06 14:42
【摘要】：单井控制范围有限和地层能量补充困难一直是困扰致密油储层开发的关键问题。压裂过程井下微地震数据监测表明,二氧化碳无水压裂改造体积是同等液量常规水基压裂的2.5倍,并能显著增加裂缝的复杂程度。室内实验和压后原油取样分析证实,二氧化碳能够有效降低原油黏度,通过无水压裂施工实现了原油混相,提高了驱油效率。压后地层静压测试显示,压后地层压力较压前有显著提高,具有单井超前补充地层能量的效果。二氧化碳无水压裂技术已在吉林油田成功应用5口致密油井进行了应用,这些井压裂后产油量均较压前有显著提高,平均单井日增油量2.31t,且施工后邻井产油、产液量均有不同程度的提高。说明了二氧化碳无水压裂增产效果良好,该技术在致密油藏开发中具有广阔的前景。
[Abstract]:The limited control range of single well and the difficulty of replenishing formation energy have been the key problems puzzling the development of tight oil reservoir. The microseismic data monitoring shows that the volume of carbon dioxide waterless fracturing is 2.5 times that of conventional water-based fracturing with the same amount of fluid, and the fracture complexity can be significantly increased. Laboratory experiments and analysis of crude oil samples after pressure show that carbon dioxide can effectively reduce the viscosity of crude oil, achieve the oil miscibility through waterless fracturing operation, and improve the oil displacement efficiency. The static pressure test shows that the formation pressure after compression is significantly higher than that before compression and has the effect of replenishing formation energy in advance by single well. Carbon dioxide waterless fracturing technology has been successfully applied in 5 tight wells in Jilin Oilfield. After fracturing, the oil production of these wells has been significantly increased, the average daily oil production of single well is 2.31 t, and the oil production of adjacent wells is also obtained after operation. The liquid production increased in varying degrees. It shows that carbon dioxide waterless fracturing has a good effect on increasing production, and this technology has a broad prospect in the development of tight reservoirs.
【作者单位】： 吉林油田公司油气工程研究院;中国石油大学(北京)石油工程学院;
【分类号】：TE357.7
，
本文编号：2366192
[Abstract]:The limited control range of single well and the difficulty of replenishing formation energy have been the key problems puzzling the development of tight oil reservoir. The microseismic data monitoring shows that the volume of carbon dioxide waterless fracturing is 2.5 times that of conventional water-based fracturing with the same amount of fluid, and the fracture complexity can be significantly increased. Laboratory experiments and analysis of crude oil samples after pressure show that carbon dioxide can effectively reduce the viscosity of crude oil, achieve the oil miscibility through waterless fracturing operation, and improve the oil displacement efficiency. The static pressure test shows that the formation pressure after compression is significantly higher than that before compression and has the effect of replenishing formation energy in advance by single well. Carbon dioxide waterless fracturing technology has been successfully applied in 5 tight wells in Jilin Oilfield. After fracturing, the oil production of these wells has been significantly increased, the average daily oil production of single well is 2.31 t, and the oil production of adjacent wells is also obtained after operation. The liquid production increased in varying degrees. It shows that carbon dioxide waterless fracturing has a good effect on increasing production, and this technology has a broad prospect in the development of tight reservoirs.
【作者单位】： 吉林油田公司油气工程研究院;中国石油大学(北京)石油工程学院;
【分类号】：TE357.7
，
本文编号：2366192
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