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• W1979927206 abstract "Abstract Heat management to reduce operational cost requires drilling of and routine monitoring of temperature observation wells. There are cases where because of economics and environmental restrictions, drilling of observation wells may not be feasible or practical. The particular point of focus are some heavy oil reservoirs such as those in the Middle East where the drilling of observation wells are cost prohitive. Using advances in downhole sensors for continous recordings of temperatures in producing wells, one can track the average in-situ temperatures from the production and the injection temperatures and use those estimates as a monitoring tool. Relating producing well's temperatures to average reservoir temperature and injection temperature may be done, depending on the well placement and reservoir geometry, through various formulations such as the Lauwerier1 or the Marx Langenheim2. Characteristics of heavy oil viscosity-temperature correlations can then serve as a basis to select producing temperatures when one can reduce steam input to levels that maintain the required fluid temperatures in the reservoir without overdoing the heat input. Optimum injection rates and incremental heat input into the reservoir can be estimated such that the temperature of produced fluid is maintained at a pre-set condition. We have tested the concept and feasibility of the proposed method with a commercial simulator, for oil gravities ranging from 10 - 14 oAPI. Introduction Production of heavy oil from Middle East reservoirs can play an important role in the future of the ever-growing world's energy consumption. Thermal recovery using steam injection has been the primary choice for heavy oil recovery and has evolved primarily in the often shallow and mostly sandstone reservoirs of U. S., Canada, Indonesia, Venezuela and other countries. Among the important lessens learned in steam injection is the importance of heat management. Heat management involves optimizing steam injection by varying the time and steam injection volume while tracking average reservoir temperatures from observation wells.4–5 Any clever reduction in steam requirement means savings in operational costs and with lesser impact on air quality caused by steam generators. The purpose of this study is to examine the heat management concept in cases where drilling of observation wells is not a viable option. Unlike many shallow fields, where the drilling of observation wells can be economically justified, drilling of such wells in many areas such as the major Middle East type heavy oil reservoirs is in general not among the viable options. The question is then whether continuous recording of temperatures in producing wells can help with the heat management program and the estimation of the injection schedule when full steam injection needs to be resumed. In the quest to examine this issue, we first focus on the viscosity -temperature correlations for various types of heavy oil. We then examine the incremental recoveries from the stored latent heat and discuss guidelines when injection needs to be resumed to maintain the gravity drainage process of oil movement by the steam zone." @default.
• W1979927206 created "2016-06-24" @default.
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• W1979927206 date "2008-03-29" @default.
• W1979927206 modified "2023-10-14" @default.
• W1979927206 title "Heat Management in Steamfloods Without the Use of Temperature Observation Wells" @default.
• W1979927206 doi "https://doi.org/10.2118/114227-ms" @default.
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