新场气田沙溪庙组JS2^4层测井评价

Logging evaluation of Shaximiao′s JS_2~4 formation in Xinchang gas field

沙溪庙组是新场气田的主力气藏,属构造-岩性复合气藏,其中的JS24层是气田的主力气层。文章从测井与地质结合的角度出发,对该层进行了测井地质分析。首先,对储层的含流体响应特征进行了分析,含气储层具有二高三低的组合特征,含水储层的特征是微球电阻率明显高侵,纵波时差与地层深电阻率呈同向变化。其次,用测井聚类分析方法实现该储层的非均质性评价,建立的4类测井相与地质上划分的4类储渗体相吻合。实践证明该方法适用于致密砂岩储层的非均质性评价。

Shaximiao Formation is the main reservoir of Xinchang Gas Field.It is a structure-litho composition reservoir and the JS24 is the main gas layer. This article started from logging and geology to analyze the logging-geology. Firstly, analyzed the fluid response property of the reservoir. The gas reservoirs have the “two high and three” composited character, the water reservoir′s character is that microshpere resistivity obviously hingly-invaded. The compress acoustic changed along with the deep resistivity. Secondly, cluster analysis method has been applied to evaluation the anisotropy of the reservoir. The established four log facies are according with the geofacies. Practice approved this method is fit to evaluate the compact sandstone reservoir.