Dynamic Material Balance Method for Estimating Gas in Place of Abnormally High-Pressure Gas Reservoirs
| العنوان: | Dynamic Material Balance Method for Estimating Gas in Place of Abnormally High-Pressure Gas Reservoirs |
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| المؤلفون: | Chunqiu Guo, Yingxu He, Lixia Zhang, Yang Yu, Zhongwei Wu |
| المصدر: | Lithosphere. 2021 |
| بيانات النشر: | GeoScienceWorld, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Material balance, 020401 chemical engineering, Petroleum engineering, 020209 energy, 0202 electrical engineering, electronic engineering, information engineering, Geology, 02 engineering and technology, 0204 chemical engineering, High pressure gas |
| الوصف: | Determination of gas in place (GIP) is among the hotspot issues in the field of oil/gas reservoir engineering. The conventional material balance method and other relevant approaches have found widespread application in estimating GIP of a gas reservoir or well-controlled gas reserves, but they are normally not cost-effective. To calculate GIP of abnormally pressured gas reservoirs economically and accurately, this paper deduces an iteration method for GIP estimation from production data, taking into consideration the pore shrinkage of reservoir rock and the volume expansion of irreducible water, and presents a strategy for selecting an initial iteration value of GIP. The approach, termed DMBM-APGR (dynamic material balance method for abnormally pressured gas reservoirs) here, is based on two equations: dynamic material balance equation and static material balance equation for overpressured gas reservoirs. The former delineates the relationship between the quasipressure at bottomhole pressure and the one at average reservoir pressure, and the latter reflects the relationship between average reservoir pressure and cumulative gas production, both of which are rigidly demonstrated in the paper using the basic theory of gas flow through porous media and material balance principle. The method proves effective with several numerical cases under various production schedules and a field case under a variable rate/variable pressure schedule, and the calculation error of GIP does not go beyond 5% provided that the production data are credible. DMBM-APGR goes for gas reservoirs with abnormally high pressure as well as those with normal pressure in virtue of its strict theoretical foundation, which not only considers the compressibilities of rock and bound water, but also reckons with the changes in production rate and variations of gas properties as functions of pressure. The method may serve as a valuable and reliable tool in determining gas reserves. |
| تدمد: | 1947-4253 1941-8264 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::3b0787f6e95536a1b984e7a9f17b6ad8 https://doi.org/10.2113/2021/6669012 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........3b0787f6e95536a1b984e7a9f17b6ad8 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19474253 19418264 |
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