摘要
根据气势场分布特征，确定气藏的供气单元，在其历史演化恢复的基础上，利用生、留、排烃量计算气藏供气单元各地质时期的排气量，并取其游离相排气量作为有效排气量，通过确定区域性盖层的形成时期，将其形成之后的有效排气量作为气藏的有效运移气量，再将扣除天然气在运移途中的围岩吸附，孔隙水溶和扩散损失量后的有效运移气量作为气藏的有效聚集气量。将上述方法应用于松辽盆地昌德气藏的有效聚集气量的研究中，结果表明昌德气藏各地质时期共获得３１５１３×１０８ｍ３的有效聚集气量。青山口组、姚家组和嫩江组沉积时期是该气藏形成的主要聚气期。
Gas supply unit in gas reservoir is
determined based on the distribution features of gas potential field. According to its historical
evolution resumption, gas expelled from gas supply unit during each geologic period is
calculated by using the amounts of generated hydrocarbon and residual hydrocarbon. The free
facies expelled amount is taken as the effective expelled amount. The effective expelled
amount after the formation of regional seal is taken as the effectively migrated amount for gas
reservoir. The effectively migrated amount, which is calculated after deducing the loss of
shoulder-bed adsorption, pore water dissolution and diffusion during migration, is taken as the
effective accumulated amount for gas reservoir. The above method is applied to the research
on effective gas accumulated amount of Changde gas reservoir in Songliao basin, and the
results indicate that the total effectively accumulated gas in Changde gas reservoir is
315.13108m3. The deposition periods of Qingshankou Formation,
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
1999年第2期13-15,共3页
Petroleum Geology & Oilfield Development in Daqing
关键词
昌德气藏
气藏
有效运移气量
有效聚集气量
Changde gas
reservoir, Gas supply unit, Effective expelled amount of gas, Effective migrated amount of gas,
Effective accumulated amount of gas, Major gas accumulated phase Yaojia Formation
and Nenjiang Formation are the major accumu
