压实与弹性膨胀对孔隙度和饱和度影响的研究  

THE STUDY OF EFFECTS OF COMPACTION AND ELASTICEXPANSION ON POROSITY AND SATURATION

作　　者：姚爱华[1] 陈元千[1] 

机构地区：[1]中国石油天然气总公司石油勘探开发科学研究院

出　　处：《石油勘探与开发》1993年第1期91-99,共9页Petroleum Exploration and Development

摘　　要：孔隙度和饱和度是储量计算工作中的两项重要参数。这两项参数都是指在地层条件下的数值,而不是地面条件下测量的数值。由于地下孔隙度和饱和度的确定有一定的难度,因而,以前是将地面测定的孔隙度和饱和度直接用于储量计算,这必将引起储量计算结果偏大。本文利用多孔介质弹性理论,对地下孔隙度与地面孔隙度,以及与有效上覆压力和埋藏深度的关系进行了系统的推导,并得到了由地面孔隙度确定地下孔隙度的不同方法。同时,对地下饱和度和地面饱和度的关系也进行了理论上的推导,得到了由地面饱和度和孔隙度确定地下饱和度的方法。Porosity and saturation are two important parameters involved in oil and gas reserve estimation. Porosity and saturation in reserve estimation values used should be those measured under subsurface conditions. But it was difficult to determine the subsurface porosity and saturation. Therefore, the porosity and saturation which were measured at surface conditions were directly used to reserve calculation usually. Thus, an error is introduced inevitably in reserve estimation. Using elastic theory, the relations between subsurface porosity vs. surface porosity, net overburden pressure or depth of burial are derived systematically, and a method of determining subsurface porosity from surface porosity is developed. The relations between subsurface saturation vs. surface saturation and porosity is derived also, and a method of determining subsurface saturation using surface saturation and porosity data is present.

关 键 词：储量 孔隙度 饱和度 压实 弹性膨胀 

分 类 号：P618.13[天文地球—矿床学]