青海涩北一号气田流动单元研究

以青海涩北一号气田为例,探讨了气藏储层流动单元研究方法。通过对各种储层参数分析,选择了自然电位相对幅度(ΔSP)、自然伽马相对幅度(ΔGR)作为流动单元划分参数,将研究目的层段储层划分为5类流动单元。其中Ⅰ、Ⅱ类流动单元储层物性最好,主要发育在高能滩坝相;Ⅲ类流动单元储层物性较好,主要分布中能滩坝相;Ⅳ类流动单元储层物性差,为低能滩坝相;Ⅴ类流动单元为泥岩层,其实质上为渗流屏障。通过综合分析,建立了研究区流动单元的分布模式,并分析了其对流体分布的控制作用。

Study of Flow Units in No.1 Sebei Gasfield of Qinghai Province

Taking the No.1 Sebei gasfield in Qinghai Province as an example,this paper deals with flow units study of gas reservoir.According to the analysis of various reservoir parameters,the relative amplitudes of the SP and the GR curves are selected as the main parameters to separate the flow units into different types.Using those two parameters,the target formations in this zone are sorted into five types,in which,the reservoir qualities of the flow unit types I and II are the best and mainly developed in reefs with high energy;the reservoir quality of the flow unit type III is the better and can be mainly found in reefs with moderate energy;the reservoir quality of the flow unit type IV is the worst and its sedimentary back ground is the reefs with lowest energy;while the flow unit Ⅴ is mud layer and it can be a kind of seepage barrier.The distribution model of flow units and the control effect of fluid distribution system of the study area are made through the integrated analysis.