Use Of Low-tension System To Improve The Study Of Low Permeability Reservoir Water Flooding Experiment

Based on the understanding of the blockage mechanism of chang 6 oil reservoir and the technological current situation of store layer deplugging, the method of injecting surfactant system into oil reservoir was put forward, try hard to utilize the surfactant system to weaken water locking and improve the porous flow characteristic of low permeability oil-bearing formation, thus achieve the goal of relieve the plugging of oil-based formation and improving the water injection development effect of low permeability oil field. The main tasks of research are as follows: Firstly, study the blockage mechanism of chang 6 oil reservoir Based on the knowledge of the wuliwan chang 6 oil reservoir's basic characteristic,we study the plugging mechanism of chang 6 oil reservoir from several respects such as: the harm of water sensitivity acid sensitivity salt sensitivity velocity sensitivity, scale deposit, the porous flow characteristic of low permeability oil-bearing formationSecondly, screening the prescription of surfactant system To get the prescription of surfactant system, a series of experiments were required: firstly, we need to screening several surfactant by doing preliminary emulsification experiment, secondly, cross-mixing the surfactant .Thirdly, have a function test on the surfactant system.Thirdly, with the real core of chang 6 oil-bearing formation, study the performance of the surfactant system on weakenning water locking and improve the porous flow characteristic of low permeability oil-bearing formation.