论文部分内容阅读
文中对蒙古林砂岩油藏原油粘度相对较高，水驱效率低的特点，提出了一种新型复合驱油体系。室内在对油水界两张力、配伍性、吸附量等方面性能评价的基础上，进行段塞优化设计。实验结果表明：该复合段塞采用混合注入的方式，不仅能够有效地降低油水界面张力，减少表面活性剂在岩石表面的吸附，而且具有很好的保持流度的能力．根据蒙古林油藏条件进行模拟实验和油藏数值模拟，复合段塞被设计为：表面活性剂浓度为0.5％，生物聚合物浓度为1400mg／L，段塞大小为0．1PV，注入方式采用混合注入，可提高原油采收率19％。
In this paper, a new type of composite flooding system is proposed for the Mongolian sandstone reservoir with relatively high viscosity and low waterflooding efficiency. Indoor based on the oil and water sector of the two strains, compatibility, adsorption and other aspects of the performance evaluation based on the slug optimization design. The experimental results show that the composite slug can be mixedly injected, which not only can effectively reduce the interfacial tension between oil and water, but also reduce the adsorption of surfactants on the rock surface, and has a good ability to maintain fluidity. According to the conditions of Mongolian reservoirs, simulation experiments and reservoir numerical simulation were carried out. The composite slug was designed to have a surfactant concentration of 0.5%, a biopolymer concentration of 1400 mg / L and a slug size of 0.1 PV, Mixed injection, can improve crude oil recovery 19%.