Case Studies of Water Shut-Off Treatments in Oil and Gas Production Wells

Falkowicz Sławomir, Cicha-Szot Renata and Dubiel Stanisław
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Cicha-Szot Renata: Instytut Nafty i Gazu, Kraków
Dubiel Stanisław: Wydział Wiertnictwa Nafty i Gazu, AGH-UST, Kraków

Gospodarka Surowcami Mineralnymi / Mineral Resources Management, 2012, vol. 28, issue 1, 125-136

Abstract: In this study some of the experimental results of water shut-off treatments in oil and gas production wells were presented. The effect of water saturation of Miocene rocks of the Carpathian Foredeep on the relative permeability to gas was analyzed. Also, wide review of the worldwide publications from the point of view of the results obtained in water shut-off treatments in oil and gas formation was presented. Based on experimental results efficiency of relative permeability modification of sandstone from Szydłowiec to brine and nitrogen by four selected chemicals polymers and microgels was evaluated.Experimental results indicated that trend changes of permeability modification strongly depends on the fluid used in the RPM treatment. Moreover, efficiency of permeability modification to brine depends on flow rate of brine through the core - the lower brine flow rate the higher efficiency of the RPM treatment. RPM product number 1 caused significant loss of permeability to brine ca. 60% and slight permeability modification to gas ca. 18%. This permeability change to brine and gas was obtained by modification of formation wettability what affects well productivity. In the case of product number 2 which is based on microgels technology, also significant modification of selective permeability to brine was observed. Loss of permeability to brine was in the range of 65 to 90% while to gas ca. 50%.

Keywords: Oil and gas production; Miocene of the Carpathian Foredeep; water saturation; relative rock permeability; water shut-off; relative permeability modification; polymers and microgels (search for similar items in EconPapers)
Date: 2012
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Persistent link: https://EconPapers.repec.org/RePEc:vrs:gosmin:v:28:y:2012:i:1:p:125-136:n:7

DOI: 10.2478/v10269-012-0007-1

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