Study on Deep Profile Control and Flooding Enhanced Oil Recovery Technology of Chromium Ion Gel in Fractured Low-Permeability Reservoir

In fractured low-permeability oil fields, after water injection, the injected water is prone to protrude along the fractures or high permeability layers, forming a water drive dominant seepage channel. The ineffective circulation is severe, affecting the volume of water drive and reducing development effectiveness and benefits. Therefore, this paper focuses on the analysis of the deep profile control and flooding enhanced oil recovery technology of Cr ion gel diluted injection with sewage distribution in the fractured low permeability reservoir of C Oilfield. Firstly, the mechanism of deep profile control and flooding was analyzed, and the adaptability of this crude oil extraction method was evaluated through indoor core experiments. Secondly, the principle of well selection and layer selection for chromium ion gel flooding is determined. Thirdly, the field effect of this method for oil displacement is introduced, which is intended to clarify the practical value of this method and promote the gradual innovation of chemical flooding enhanced oil recovery technology for fractured low-permeability reservoirs in China.