利用不同沉积微相的感应曲线侵入特性识别油水层——以二连盆地GG凹陷为例

Intrusion characteristics of induction curve of different sedimentary mierofacies and identification of oil and aqueous layers——taking GG sag in Erlian basin as an example

研究区G区位于二连盆地GG凹陷中洼槽缓坡带,地质特征复杂,多种沉积微相发育。以G区地质和地层倾角的解释结果为依据,结合储层岩石物性分析资料,分析了该区腾格尔组辫状河道和分流河道两种主要沉积微相的四性关系特征,利用非电法资料区分渗透层、致密层,并利用双感应一八侧向曲线的侵入特征建立了解释标准,收到良好的应用效果,提高了解释符合率。

G block,located at the gentle slope of GG sag,Erlian Basin,is of complex geologic setting,for it is full of multiple sedimentary microfacies,and the microfacies are closely cor- relative with the oil-bearing degree of reservoir.In terms of geology setting and the interpretation results in G block and in combination with the physical properties of reservoir,the four characters of braided channel and distributary channel in Tenggeer Formation is analyzed.The coincidence rate of log- ging interpretation is raised after the non-electrical data is used to distinguish permeable horizon from compact layer, and the intrusion characters of the dual induction-octo-lat- erolog curve.