[boyle-tory] physical TEST ON A NATURAL GAS WELL 143 



Table II. 



The rates of flow and maximum pressures given in Table II are 

 plotted in curves and shown in Figure 3. Both pressure and flow 

 curves show that after fourteen days, gas was still slowly accumulating 

 at the well, and there is not much indication that this process was at 

 all nearing completion. 



The fall and subsequent rise shown in the pressure curve are 

 matters of interest. It is reasonably explained by the presence of 

 water at the bottom of the well, the water having been brought there, 

 fronrthe gas and water-bearing sands, by the flow of gas in the seven 

 days blow-off test. The closed pressure fell during the two and one- 

 half days following the seven days' blow-off, and the total drop of 

 pressure was 30 pounds per square inch. Since the specific gravity 

 of this salt water was 1-064 there must have been, if this explana- 

 tion is correct, a rise of water in the well of at least 66 feet. This 

 was relatively not a great quantity, when it is remembered that the 

 total depth of the well was 2,340 feet, and the gas had been flowing 

 for seven days without interruption. It is worth noticing that the 

 rate of flow of gas increased during the time the pressure was 

 falling. 



During the fourteen days' accumulation test, opportunity was 

 taken to observe the rise of pressure on closing the valves after the 

 ten-minute open flow. Readings of pressure and time were taken, and 

 from these readings pressure-time curves have been plotted. A few 

 of these observations are given in Table III, and some of the pressure- 

 time curves are shown in Fig. 4. 



Sec. III. 1915—11 



