Research Article
Performance Analysis of Gas Wells Based on the Conventional Decline Parameters and the Flow Integral Equation
(a) The analysis results of the decline parameter method for numerical cases with normal pressure |
| | Normal pressure cases | Case 1-1 | Case 1-2 | Case 1-3 | Case 1-4 |
| | (MPa) | 20 | 15 | 10 | 5 | | (104 m3/d) | 1.165088 | 2.326642 | 3.486867 | 4.645448 | | (10-4 d-1) | 3.898168 | 4.040669 | 4.217685 | 4.402959 | | 0.133561 | 0.254215 | 0.325809 | 0.331420 | | (108 m3) | 1.907956937 | 1.906270758 | 1.897272945 | 1.915 021414 | | Error1 (%) | 1.041 | 0.952 | 0.475 | 1.415 | | (10-3 MPa/104 m3) | 1.480821926 | 1.490280824 | 1.499442534 | 1.492784717 | | (108 m3) | 1.882387122 | 1.870439503 | 1.859010973 | 1.867302158 | | Error2 (%) | -0.313 | -0.946 | -1.551 | -1.112 |
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(b) The analysis results of the modified Stumpf method for numerical cases with normal pressure |
| | Normal pressure cases | Case 1-1 | Case 1-2 | Case 1-3 | Case 1-4 |
| | (MPa) | 20 | 15 | 10 | 5 | | (104 m3/d) | 1.162916 | 2.319957 | 3.489227 | 4.705304 | | (10-4 d-1) | 3.852920 | 3.968173 | 4.228281 | 4.715305 | | 0.115682 | 0.227445 | 0.325268 | 0.408158 | | (108 m3) | 1.921676867 | 1.956024199 | 1.994686597 | 2.042141878 | | Error3 (%) | 1.768 | 3.587 | 5.634 | 8.147 |
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