加拿大油砂SAGD开发储量品质评价关键参数研究

KEY PARAMETERS OF RESERVE QUALITY EVALUATION FOR OIL SAND SAGD DEVELOPMENT IN CANADA

笔者立足于油砂SAGD开发的实际效果,分析影响油砂SAGD开发的主要地质因素,确定油砂储量品质评价的关键地质参数。研究结果表明HPVH、Facies1比例和Sw 3项参数是决定油砂SAGD开发储量品质的关键参数。明确了关键参数的界限:HPVH>6m^3/m^2,Facies1比例>70%作为Ⅰ类储量划分界限;HPVH <4m^3/m^2,Facies1比例<70%作为Ⅲ类储量划分界限;Ⅱ类储量划分界限介于上述二者参数之间。依据含水饱和度和累积汽油比的关系将Ⅰ类储量进一步细分为Ⅰ-1和Ⅰ-2。储量品质评价关键参数研究结果为油砂SAGD开发储量品质评价奠定了基础,也为SAGD开发水平井井位部署提供了依据。

This paper is devoted to the study of main geological factors affecting SAGD development of oil sand in Canada and defining key geological parameters for reserve quality evaluation based on the performance in SAGD development.It is revealed that the key parameters for reserve quality evaluation include HPVH,Facies1 percentage and Sw.Criteria are established for defining each parameter mentioned above.There are three types of reserves.The type Ⅰ is the reserve with HPVH higher than 6 m^3/m^2 and Facies1 percentage more than 70%,the type Ⅲ is that with HPVH less than 4 m^3/m^2 and Facies1 percentage less than 70%,and the type Ⅱ are those having the parameters between the type I and type IE.The type I could be further divided into 2 sub-types based on Sw.The results mentioned above can be taken as the foundation of reserve quality evaluation,and used as the basis for well placement in un-development areas during SAGD production.