Water Cut Determination From Well Logs In Fractured And Vuggy Formations Available to Purchase

Quantitative interpretation of well logs in fractured and vuggy reservoirs require specialized techniques as the conventional interpretation methods give only water saturations of the total reservoir rock. This is not a sufficient indication of the fluids productivity to be expected. A specialized interpretation technique for the determination of the initial water-cut in fractured and vuggy reservoirs is proposed. The results of calculations using this method are compared to actual production or drill-stem test records. Seven of the well logs interpreted are from the Leduc reef of Alberta, two from the Nisku lime of Alberta, and each from the Sturgeon reef of Alberta, the Hunton lime of Southern Oklahoma, and Tensleep sand of Wyoming, the Beaverhill Lake lime of Alberta, the San Andres lime of West Texas and the Ellenberger lime of West Texas. The study of these well logs has indicated that the proposed technique is generally valid. It is expected that further studies together with more complete and suitable logging programs will make this a more refined interpretation technique.