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• 5. Install instrumentation to measure the pressures and flow of the natural <br />gas. <br />Flow and pressure measurement instrumentation wi11 be installed on the <br />29-24 well pad to measure the incoming natural gas pressure, the natural gas <br />flow to the compressor, the natural gas flow to the well, and the natural gas <br />injection pressure. (Figure 6) <br />The instrumentation data will be included in the ASLLP process control <br />system. An average data point will be retrieved every 10 seconds. This data will <br />reside within the ASLLP PI Data Historian software for monitoring and <br />documentation. This system has the flexibility to provide data in any format <br />chosen. At present, ASLLP envisions providing daily averages for all measured <br />parameters for agency oversight. <br />6. Modify the ASLLP solution mining wellhead to operate at the anticipated <br />surface pressures. <br />Presently the well 29-24 has ANSI class 600 flanges and valves installed <br />on the wellhead. These flanges and valves have a maximum pressure rating of <br />1410 psi at 400 degrees F. The wellhead must be modified to ANSI class 900. <br />This will provide a pressure rating of 2115 psi @ 400 degrees F. (Figure 7) <br />• Cavity Fluid Displacement General Information <br />Upon completion of the solution mining phase, approximately 200,000 <br />tons of nahcolite will have been produced. The cavity volume will contain 25 - <br />30 million gallons of fluid. This fluid will contain between 22 - 27 thousand tons <br />of nahcolite in solution. At a displacement rate of 200 gallons per minute, the <br />displacement will take 86 to 105 days to complete. Approximately 300 million <br />standard cubic feet of natural gas will be required to displace the cavity. The <br />compressor flow rate requirement will be approximately 2200 standard cubic feet <br />per minute. <br />The bottom of the long 4'/z" tubular in well 29-24 is 2259 feet below the <br />surtace. The pressure required to displace the fluid would be 1500 - 1600 psi. <br />This equates to 0.66 - 0.71 psi per foot. The current line pressure within the <br />ASLLP main gas pipeline is 600 to 800 psi. The initial displacement will not <br />require the operation of the compressor. The final stages of the displacement <br />will require the compressor. <br />Cavity Fluid Displacement Procedure <br />Upon completion of the seismic modeling phase, the fluid displacement <br />• phase can be initiated. The procedures for displacing the fluid from well 29-24 <br />are as follows: <br />