高含水油田聚/表二元驱注入参数优选研究

Optimization of Injection Parameters for Polymer/Surfactant Binary Flooding in High Water Cut Oilfields

参照适合开展化学驱油藏的筛选标准筛选砂体开展聚/表二元驱,通过利用正交设计开展化学驱多参数多水平方案筛选,大大减少了数值模拟筛选的工作量并且提供可靠的试验结果,提高工作效率。并在此基础上开展4种段塞组合的数值模拟筛选工作,根据不同方案的采收率增量和吨化学剂增油量优选最适合的注入方式,保证提高油藏采收率的同时兼顾经济性,预计可提高采收率16.87%,含水可降低8.5%,为现场实施方案提供可靠的理论依据。

According to the screening standard suitable for chemical flooding reservoir, the sand body was selected to carry out polymer/surfactant binary flooding, and the multi-parameter and multi-level program selection of chemical flooding was carried out by using orthogonal design which can greatly reduce the workload of numerical simulation screening and provide reliable test results and improve work efficiency. On this basis, four kinds of slug combination were selected by numerical simulation, and the most suitable injection method was determined according to the oil recovery increment of different schemes and the oil production increment, it was estimated that the recovery factor could be increased by 16.87% and the water cut could be reduced by 8.5%.