延长气田山西组储层流体性质测井识别方法研究及应用

Reservoir Fluid Logging Identification Method Research and Application of Shanxi Formation in Yanchang Gas Fields

上古生界山西组山2段是延长气田主力开发层,受储层复杂的物性、电性、流体等因素的影响,常规方法难以准确识别气层。本文运用铸体薄片、扫描电镜、物性分析等分析手段,在对鄂尔多斯盆地延长气田山西组气层岩石骨架性质研究基础之上,结合储层流体性质及四性关系的研究,最终建立出适合本区流体识别模板。现场实践表明,该方法给出了统一的识别解释标准,判识正确率达到83%以上,满足实际生产的需求,能为气田进一步的勘探开发提供科学依据。

Shan2 member of Shanxi Formation（ the upper Paleozoic） is the main exploitation formation of Yanchang gas fields,which is influenced by sophisticated reservoir physical property,electricity and fluids and so on. It＇s difficult to use the conventional methods to identify gas bearing reservoir accurately. This paper applied casting sheet image,SEM（ scanning electron microscope） and physical property analysis or the other methods to finally establish an identification template fitting the fluid of this region. All these are based on the research for the rock skeleton properties of Yanchang gas fields of Shanxi Formation in the Ordos Basin,and It also combines the study about reservoir fluid properties and four characters of reservoir. Oil field practices shows that this method gives the united identification and explanation criterion,and its accurate reaches more than for 85%. By this way it can not only meet the actual production needs,but also provides scientific basis for the further exploration of the gas fields.