摘要
针对传统压裂体系因耐温性差和滤失性不足而对储层损伤较高的问题,提出一种新型油基压裂液的制备,并以传统水基压裂液和传统油基压裂液为参照,对新型油基压裂液的性能进行考察。实验结果表明,新型油基压裂液表观黏度为122.5mPa·s,表观黏度降低至50mPa·s以下的温度为135℃,渗透滤失系数为1.654×10^(-4)m·min^(-1/2),初始滤失量为1.97×10^(-4)m^(3)·m^(-2),滤失速度为0.428×10^(-4)m^(3)·(m^(2)·min)-1,对岩层的伤害率仅为4.2%;在一定温度条件下,新型油基压裂体系的破胶液黏度低于5mPa·s,满足现代油田现场70℃的破胶要求;破胶后,残渣量较少,可以明显改善压裂液污染地层的情况,对低孔和低渗地层有很好的应用效果。
A new type of oil-based fracturing fluid is proposed to address the issue of insufficient temperature resistance and filtration resistance in traditional fracturing systems,resulting in high reservoir damage.The experiment compared the performance of the new oil-based fracturing fluid with traditional water-based fracturing fluid and traditional oil-based fracturing fluid.The experimental results show that the new oil-based fracturing fluid has an apparent viscosity of 122.5mPa·s,a temperature of 135℃at which the apparent viscosity decreases to below 50mPa·s,and a permeability filtration coefficient of 1.654×10^(-4)m·min-1/2,with an initial filtration rate of 1.97×10^(-4) m^(3)·m^(-2),with a filtration rate of 0.428×10^(-4)m^(3)·(m^(2)·min)-1,the damage rate to the rock layer is only 4.2%;Under certain temperature conditions,the viscosity of the breaking fluid in the new oil-based fracturing system is less than 5mPa·s,meeting the breaking requirement of 70℃in modern oil fields.After breaking,the residual amount is less,which can significantly improve the pollution of the fracturing fluid to the formation.It has good application effects for low porosity and low permeability formations.
作者
朱文波
ZHU Wen-bo(Sinopec Gas Company,Beijing 101312,China)
出处
《化学工程师》
CAS
2024年第7期51-54,共4页
Chemical Engineer
关键词
油基压裂液
储层损伤
破胶性能
表观黏度
oil based fracturing fluid
reservoir damage
gel breaking performance
apparent viscosity
