Back-Pressure Data on Natural-Gas Wells and Their by Edwin Lee Rawlins

By Edwin Lee Rawlins

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Additional info for Back-Pressure Data on Natural-Gas Wells and Their Application to Production Practices. United States. Bureau of Mines. Monograph 7

Sample text

Since from the formula Q=C (Pl-P/) ", the value of C is expressed as follows: Log C=log Q-n log (P f 2_P/). 7. 3. 7SJo. DETERMINATION OF ABSOLUTE OPEN FLOW Line A (fig. 6) is extended until it intersects a line drawn horizontally representing the value of Pt 2 _ P S 2 equivalent to p t 2 or 202,500. The effect of atmospheric pressure or the equivalent of a back pressure at the sand of 13 pounds per square inch is negligible in the calculation for this well and the absolute open flow therefore is read directly from the plotted relationship to be approximately 42,800,000 cubic feet of gas per 24 hours.

Ft. 705 805 i 550 1. 2 ......... 3 ......... 4 ......... 5 ......... .. .. .. .. .. I 563 315 422 459 484 504 .. 1 ........ 5,740 3,890 2,780 1,1338 2 ........ 3 ........ 4 ........ .. .. , Reading no. lb. per sq. in. absolute lb. per sq. in. absolute 5,740 3,890 2,780 1,638 773 P ....... 2 ........ 3 ........ 4 ........ 780 1,638 773 1' ....... , PI. P •• Reading no. lb. per sq. in. absolute lb. per sq. in. absolute Pi!. 2, thousands M cu. ft. 12 ........ 2 ......... 3 ......... 4 ......

2 ......... 3 ......... 4 ......... 5 ......... .. .. .. .. .. I 563 315 422 459 484 504 .. 1 ........ 5,740 3,890 2,780 1,1338 2 ........ 3 ........ 4 ........ .. .. , Reading no. lb. per sq. in. absolute lb. per sq. in. absolute 5,740 3,890 2,780 1,638 773 P ....... 2 ........ 3 ........ 4 ........ 780 1,638 773 1' ....... , PI. P •• Reading no. lb. per sq. in. absolute lb. per sq. in. absolute Pi!. 2, thousands M cu. ft. 12 ........ 2 ......... 3 ......... 4 ...... ·1 5 ......... 0 I' ........

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