Modeling of Chemical Water Shut off Treatments

Abstract

Forat M Mohamednour, Motaz M Saeed and Anas A Ahmed

Water production is one of the major problems that been encountered in the oil industry, which may cause corrosion of tubular, fine migration and acceleration of well abandonment. More than $40 billion is spent yearly dealing with unwanted water, so a treatment should be implemented to reduce high water production. Many papers investigated and focused their researches on how to reduce water cut percentage. Mechanical and chemical treatments are suggested, chemical treatment represented in polymer-gel with cross linker solution proved optimistic results. Gel can solve many types of water production problems rather than other chemical or other mechanical treatments. In this paper a model was constructed to determine the applicability of gels in reducing water permeability. The model included equations predicted using statistical software (SPSS) that determines the water residual resistance factor (Frrw) and the oil residual resistance factor (Frro) by inserting polymer concentration then determine the optimum concentration which gives the most desired results. A real field data was obtained from Z field (well X, well Y, and Well Z) and gel applicability in permeability reduction had been tested, then an optimistic result obtained. The outcomes of this study investigate that there is a great chance to apply polymer-gel as water shut-off technique. For future work a full core-flooding study must be constructed to obtain more set of data and improvement of the equations accuracy

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