低渗透油田缝内转向压裂工艺适应性研究

Adaptability research of fracture shift technology in low-permeability oil field

主要就缝内转向剂的热稳定性、配伍性、对地层的伤害性、封堵及返排能力等做了适应性评价实验,筛选出了适应长庆低渗透油田的暂堵剂,并通过工艺改进配套在现场应用中取得了较好的效果,为低渗透油田的重复压裂改造提供了有力的理论和实践经验。该研究成果的成功研究与应用,不仅可以提高侧向油井的单井产量,而且可以提高整个区块开采力度,可取得十分可观的经济效益和社会效益。

We mainly evaluate the adaptive ability by experience on the thermal stability of diverting Agent within the steering joints,compatibility, harmulness to reservoir and Capacity of blocking and back row,and select diverting Agent to adapt to of Changqing Oilfield,and improvement Technology , the better results achieved, provide the theoretical and practical experience for the low-permeability oil fields refracturing.The application of the outcome of the study,not only can improve the side of the single well oil production,but also improve the exploitation of the whole block,and can be achieved very substantial economic and social benefits.