A Quantitative Method for Identifying Gas Channeling in Horizontal Wells With Consideration of Permeability Differences

ABSTRACT CO 2 flooding is an effective method of increasing production in tertiary oil recovery, but it faces engineering difficulties such as channeling. The main issue is that the heterogeneity of the reservoir leads to CO 2 fingering in the reservoir. To this end, this paper constructs a method for identifying and calculating the volume of gas channeling channels in horizontal wells with consideration of permeability differences, and conducts field application verification. The results show that the permeability extreme limit is 4, the permeability extreme range is 4.5–10, and the liquid production ratio is positively correlated with the permeability difference. The calculation results of the gas channeling volume have a good correspondence with the gas invasion volume, and the calculation results are relatively accurate. This method realizes the identification of gas channeling channels and the calculation of gas channeling volume, provides data reference for the selection of site channeling points and the screening of channeling systems.