底水稠油油藏润湿性对水锥回升的影响

Effect of Wettability on Water Cone in Bottom Water Reservoir

胡俊杰 马珍福 邵现振 钱军 李月胜 张贵才 王翔

HU Junjie MAZhenfu SHAO Xianzhen QIAN Jun LI Yuesheng ZHANG Guicai WANG Xiang

岩石润湿性对底水油藏压锥后延缓水锥回升具有重要影响，但影响程度并不明确。因此，以接触角为指标 优选具有不同润湿能力的4 种润湿调节剂。将其溶于油溶性降黏剂，评价了该降黏体系对稠油降黏、抑制水锥回 升的影响，定量描述了润湿性和采出物性条件之间的内在联系，分析了润湿调节剂的作用机理。结果表明，4 种 润湿调节剂对降黏剂的降黏性能没有影响。油湿润湿剂作用后的储层抑制底水回升的效果最好，平衡压力比达 到3.75，净采出程度提高15.17%；而强水湿润湿剂作用后的储层平衡压力比仅为0.54，净采出程度提高6.51%。 润湿性和采出物性之间表现出明显的规律性。调整储层润湿性可以有效抑制水锥的回升，提高原油采出程度。

Rock wettability has an important effect on delaying the rise of water cone after the water cone is pressed in bottom water reservoir，but the degree of influence is not clear. Therefore，four kinds of wetting agents with different wetting abilities were preferred with the contact angle as an index. The wetting agents were dissolved in oil-soluble viscosity reducer，then the effects of the viscosity reducing system on viscosity reduction of heavy oil and inhibition of water cone rise again were evaluated. The internal relationship between wettability and production physical condition was quantitatively described. The action mechanism of the wetting agent was analyzed. The results showed that the four wetting agents had no effect on the viscosity reducing performance of viscosity reducer. The reservoir under the action of lipophilic wetting agent had the best effect of restraining the rise again of bottom water. The equilibrium pressure ratio reached 3.75，meanwhile the net recovery degree was increased by 15.17%. However，the equilibrium pressure ratio of the reservoir under the action of a strong hydrophilic wetting agent was only 0.54，meanwhile the net recovery degree was increased by 6.51% . There was obvious regularity between wettability and recovered physical property. Adjusting the wettability of reservoir could effectively restrain the rise again of water cone，and therefore improve the oil recovery.

10.19346/j.cnki.1000-4092.2022.04.012