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• 6. OPERATING DATA <br />The average daily rates of fluids to be recycled ('injected") over the life of the Pilot Test <br />are not precisely known at this time. Fluids to be injected are produced oil, a distillate <br />fraction(s) of produced oil, purchased fuel oil, or any combination of these streams. <br />Surge and storage working capacity for these fluids at the surface is 8000 gallons (190 <br />bbl). Injection rates and pressures in our design are: <br />Average daily rate: 5.7 gallons/minute <br />Maximum daily rate: 8.7 gallons/minute <br />Average pressure: 200 psi to 1000 psi, depending on downhole pressure <br />Maximum pressure: 1000 psi <br />The pressure in the heater-producer well will be varied between 150 psig and 800 psig to <br />determine optimal working conditions. <br />Pressurized nitrogen will be used to operate a gas piston pump to push oil and water from <br />below the heater. <br />A single heater-producer well with an inclined electric heater, as shown schematically in <br />Figure 6-1, will be used in the Pilot Test to determine the critically important aspects of <br />vertical and lateral retort growth and confinement during the heating process. The <br />casing, pipe string, and heater are depicted more precisely in Figure 6-2. <br />The heater-producer well will terminate at the retort boundary and will consist of <br />cemented casing and a series of concentric tubes as shown in Figure 6-2. The retort will <br />occur in the open well bore in the R1 zone located below the cemented casing. <br />There are two possible locations for perforations allowing the oil vapors to exit the <br />boiling into the formation (2075 and 2125 ft), and the retort is expected to grow <br />around those points. <br /> <br />16