摘要
受济阳坳陷古近系中深部储层出现异常低压的启示,讨论了成岩过程中主要矿物蚀变的"耗水"问题,并从理论上计算了这种蚀变的耗水量。初步研究表明,成岩过程中矿物蚀变的"耗水"作用可使地层水大量减少,在没有足够外部流体补充的情况下,相应地层必然呈低压状态,并与围岩形成一定的压力差,易于烃类进入成藏。
Inspired from anomaly low pressure in the middle and deep reservoir of Peleogene in Ji Yang Depression, ＂water consumption＂ of main mineral alteration in diagenetic stage is discussed and accounted theoretically. Initial result shows that ＂water consumption＂ of mineral alteration in diagenetic stage can make formation water greatly decreasing. Relevant formation must be in the state of low pressure without complementarity of exterior liquid. Different pressure between relevant formation and enclosing rock make hydrocarbons enter easily and form the reservoir.
出处
《油气地球物理》
2006年第4期1-6,共6页
Petroleum Geophysics
关键词
成岩作用
“耗水”作用
蚀变
长石
高岭石
diagenetic function, ＂water consumption＂ function, alteration, feldspar and kaolin
