Abstract
The test area is a low porosity and low permeability reservoir. It was put into development in October 2005. The early effect was good, the later production decreased significantly, the ineffective water cycle was serious, the development layer series was few, and the main layer measures were difficult to increase production. In this paper, we carry out water quality analysis experiments of the produced fluid, and understood the change law of the main controlling factors Cl-and Ca2+ for evaluating the effect of ion water flooding. Combined with the production dynamics, we evaluated the effect of the measures, guided the optimization of the measures, designed the scheme, and understood the law of oil displacement. Through this study, it can be clearly and intuitively seen that the replacement effect of ion water flooding has a good oil washing effect, which has important application value and certain academic significance for the development of low permeability oil fields.
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