双开关排烃模型及其在辽东湾地区的应用  

TWO-SWITCH HYDROCARBON EXPULSION MODEL AND ITS APPLICATION IN LIAODONG BAY

作　　者：陈荣书[1] 罗毓辉 等 

机构地区：[1]中国地质大学，武汉430074 [2]中国海洋石油渤海公司，天津300452

出　　处：《中国海上油气（地质）》1995年第4期253-262,共10页China Offshore Oil and Gas(Geology)

摘　　要：自晚期生油说确立以来，排烃就成为油气地质研究和油气资源量评价中最突出的难点。本文吸取前人已有的研究成果，以独立相作为排烃的主要相态，建立一个二维（剖面）双开关排烃模型。即认为孔隙流体压力达到破裂压力值且含油饱和度超过临界值时，开始排烃，直到压力降到一定限值使裂缝闭合为止。就某一有效烃源岩而言，可以发生一次或多次排烃过程。应用该模型研究辽东湾地区的排烃，取得了良好效果。Since the theory of late-hydrocarbon-generation proposed, hydrocarbon expulsion has been a difficult problem in petroleum geological research and resources evaluation. In this paper, a two-dimensional double-switch expulsion model is set up to simulate the hydrocarbon expulsion process during a basin development. The model is based on the following assumptions: (1)oil generated cannot be expelled if the fluid pressure is lower than a fracture pressure value and the oil saturation below the critical saturation value. (2) hydrocarbon is assumed to expell mainly in separate phases. The model is used to calculate the volume of hydrocarbon expulsion in Liaodong Bay and the result is satisfactory.

关 键 词：双开关排烃模型 辽东湾地区 应用 破裂压力 临界含油饱和度 油气地质 

分 类 号：P618.130.2[天文地球—矿床学] TE12[天文地球—地质学]