- Tytuł:
-
Sposoby uaktualniania charakterystyki wydobywczej odwiertu gazowego przez okresową modyfikację wielkości współczynnika przepływu laminarnego
Periodic updating of the laminar flow coefficient of the gas well deliverability formula - Autorzy:
-
Szpunar, Tadeusz
Budak, Paweł - Powiązania:
- https://bibliotekanauki.pl/articles/1834378.pdf
- Data publikacji:
- 2020
- Wydawca:
- Instytut Nafty i Gazu - Państwowy Instytut Badawczy
- Tematy:
-
możliwości produkcyjne
odwiert gazowy
test wielocyklowy
współczynnik przepływu laminarnego
współczynnik przypływu turbulentnego
ciśnienie denne stabilizacji
ustabilizowane natężenie przypływu
gas well deliverability
multi rate gas well test
laminar flow coefficient
turbulent flow coefficient
stabilized down hole pressure
stabilized flow rate - Opis:
- The deliverability of each gas well must be known before the gas production is started which means that the relation between gas flow rate and bottom hole drown down pressure must be known in advance. The classical, isochronal and modified isochronal tests are used for this purpose. All of these tests should be able to calculate the coefficients of deliverability equation but laminar flow coefficient in particular because the turbulent flow coefficient doesn’t change much during well production period. In the paper proposed are techniques for approximate evaluation of laminar flow coefficient without closing the well for pressure build up and for evaluation of the average reservoir pressure. The laminar flow coefficient must be known to evaluate the relation between the gas flow rate and the drown down pressure. Provided are examples of calculation procedure using each of the techniques. Data from domestic gas industry were used to demonstrate usability of proposed methods. Obtained results of calculation of laminar flow coefficients using the proposed techniques are very close to results of the standard multi rate gas well deliverability test. The proposed method for calculation of laminar flow coefficient assumes that the exponent in deliverability formula may be different than two and that the flow rates must be equal to geometric average of the proceeding and the following rate which require to use the flow rate control choke. No such tests are used in industry but among hundreds of test data the authors succeeded to find a dozen or so which accidentally satisfied this requirements. The paper also provides another simple procedures for calculation of laminar flow coefficient which do not require closing the gas well for pressure buildup.
- Źródło:
-
Nafta-Gaz; 2020, 76, 4; 239-248
0867-8871 - Pojawia się w:
- Nafta-Gaz
- Dostawca treści:
- Biblioteka Nauki
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