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- W1973879023 abstract "Abstract This paper presents a technique for relating wireline log data to production in the Morgan Lloydminster A Pool. It will be shown that information derived from this study of log data can be used to determine a particular heavy oil well's producing potential. Should the well not be producing to this estimated potential, the technique derived will indicate if a stimulation is necessary or warranted. Recommendations will be given for evaluation of other similar heavy oil reservoirs. It should be noted that the process discussed is a simplification made necessary because of the limited log data available on the majority of the wells. Introduction Murphy Oil Company Ltd. operates approximately 70 wells in the Morgan Field, located 40 km northwest of Lloydminster, Alberta (Fig. 1). At first glance the primary producing horizon, the Lloydminster sand, appears fairly uniform throughout the field, yet production can vary from less than 1 m3 of oil per day to in excess of 6 m3 of oil per day. This paper discusses a technique to determine if a Morgan Lloydminster A Pool well is producing to expected standards. The technique will be shown useful in determining if further work is warranted to bring the well up to these standards. Geology The oil sands of Lloydminster are sedimentary deposits of the Cretaceous Age. The Mannville sands of interest commonly include the Colony, McLaren, Waseca, Sparky, G.P., Rex, Lloydminster, Cummings and Dina (Fig. 2). This group of sands was deposited in the high-energy environment of the receding waters of the Boreal Ocean. Hence, they are a mixture of marine and continental shales, sandstones, siltstones and thin limestone stringers. They are relatively clean and unconsolidated with average porosities in the 30% range. The Lloydminster sand is of primary interest in this paper. It is relatively clean unconsolidated sand with an average clay volume of 10% and porosities in the 30% range. The sand is generally 8 m to 16 m thick, and is found at an average depth of 550 m. The oil is 12 degrees API gravity and a viscosity of 18 000 m Pa.S at 20 °C. Well Evaluation and Production Results Most of the Morgan Lloydminster A Pool wells have been logged in the past with resistivity-spontaneous potential and neutron-density porosity logs. When it became obvious that production from well to well varied more than these logs would appear to indicate, the logging suite was modified to include an indicator of the amount of oil moved. Wellsite computer generated processes utilizing these logs were also used to aid in the interpretation of the reservoir (Fig. 3). Figure 4 shows wellsite computed products from two wells, 12A-10-52-4W4 and 11D-10-52-4W4. Both have average porosities between 25% to 30% and water saturations of 10% to 25%. If anything, the wellsite computed product in 12A-10 would indicate slightly higher porosity and a slightly cleaner zone. Yet 12A had a stabilized initial production of 3 m3 of oil per day, while 11D-10 had a stabilized initial production of 6 m3 of oil per day." @default.
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- W1973879023 date "1986-11-01" @default.
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- W1973879023 title "Productivity Potential Indicator In A Heavy Oil Reservoir" @default.
- W1973879023 doi "https://doi.org/10.2118/86-06-04" @default.
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