天然气工业2001，Vol.21Issue(2)：71-74,4.
对容积法计算气藏采收率和可采储量的修正
CORRECTION OF THE GAS RESERVOIR RECOVERY FACTOR AND RECOVERABLE RESERVES ESTIMATED BY VOLUMETRIC METHOD
李忠兴 1郝玉鸿2
作者信息
- 1. 长庆油田公司勘探开发处
- 2. 长庆油田公司勘探开发研究院
- 折叠
摘要
Abstract
In general，when the gas reservoir recovery factor and recoverablereserves were estimated by volumetric method，on the one hand，a certain error existing in the proved geological reserves estimated by volumetric method wasn't considered and the recovery factor calculated by dynamic reserves was wrongly taken as that by the volumetric geological reserves，because of neglecting the flowability of natural gas in reservoir，which led to that the recoverable reserves estimated was on the large side， and on the other hand，it was neglected that the gas saturation under initial conditions was different from the one under abandonment conditions in a water-drive gas reservoir． It is the reason why the formula was wrongly applied and the result calculated was far from fidelity． Through theoretical analysis and example calculation，it is thought that only the dynamic reserves can be logically related to the dynamic recovery factor，the recoverable reserves calculated by the two parameters are reasonable and correct and the recovery factor calculated by volumetric reserves should be reduced according to the recovery factor calculated by dynamic reserves and the dynamic reserves-volumetric reserves ratio． The recovery factor calculated by dynamic reserves has lateral comparability but that by volumetric reserves hasn't． Meanwhile，it is proposed that the difference between the gas saturation at the initial stage and that at the abandonment pressure stage should be considered，thus further correcting the methods of calculating gas reservoir recovery factor and recoverable reserves by volumetric method．关键词
气藏/容积法/采收率/储量/动态/可采储量/含气饱和度/修正分类
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李忠兴,郝玉鸿..对容积法计算气藏采收率和可采储量的修正[J].天然气工业,2001,21(2):71-74,4.
