学科:煤层气地质学 词目:煤层含气饱和度 英文:gas saturation in coalbed 释文:煤层孔隙被气体充满的程度。通常从吸附等温曲线上求得,即含气饱和度等于实测含气量与原始储层压力在吸附等温曲线上所对应的理论含气量的比值。亦可用下列公式计算煤层含气饱和度: Sg=(V/VL)[(PL+Pr)/pr] 式中:Sg为煤层含气饱和度;V为实测含气量(立方米/吨);Pr为实测储层压力(兆帕);VL为兰格缪尔体积(立方米/吨);PL为兰格缪尔压力(兆帕)。
影响煤层气可采性的主要地质因素有:煤层的渗透性、储层压力、含气饱和度、解吸率等。
Main geologic factors that influence recoverability of coal-seam gas include coal-bed permeability, reservoir pressure, gas saturation and desorption rate.
并认为只有在含气饱和度较高的煤层气藏,且具有较高的渗透率,才能成为煤层气勘探的有利区块。
Only in coal bed methane accumulation area with higher saturation and permeability is the favorable area for coal bed methane exploration and development.
当含气饱和度一定时,储层压力对煤层气井早期的气产率和水产率有较大影响。
When the coalbed methane saturation is constant, the pressure of coal reservoir has a relatively great influence on the me...
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