原油沥青质沉积引起储集层损害的室内评价

防止沥青质沉积造成的储集层损害是渤海稠油油藏开发生产中遇到的技术难题之一。结合渤海SZ36-1油田实际情况，使用岩心流动实验装置，建立沥青质沉积导致储集层岩心渗透率下降的室内评价方法，并应用SARA法对稠油发生沥青质沉积的可能性进行预测。评价实验结果表明，损害程度与沥青质沉积量和储集层岩心的原始渗透率有关。沉积量越大，原始渗透率越低，则损害越严重。表5参12

The laboratorial evaluation of formation damage induced by asphalting precipitation

To prevent the formation damage induced by asphalting precipitation is one of the technical difficulties during development and production of heavy crude oil reservoir in the Bohai Sea. A laboratorial evaluation of formation permeability reduction was established by using the core flooding test device in which the reservoir situation of SZ36 1 field located in the Bohai Sea could be identified. In addition, the possibility of asphalting deposition for the Bohai Sea heavy oil was also predicted with the SARA method. It is indicated that the damage degree is related to the amount of asphalting precipitation and the initial formation permeability. The more the asphalting is precipitated and the lower the initial permeability is, the more serious the formation damage will be.