W-S模型在泥质砂岩储层含油性评价中的应用

APPLICATION OF W-S MODEL TO OIL ASSESSMENT IN ARGILLACEOUS SANDSTONE RESERVOIRS

程相志 周凤鸣 彭银辉 赵凌风

Cheng Xiangzhi Zhou Fengming Peng Yinhui Zhao Lingfeng

W-S模型是计算泥质砂岩储层含油饱和度的有效方法,具体表述为饱含水泥质砂岩和含油泥质砂岩电导率方程为:=(1/F′)(+B),=(/F′)(+(/))。B是模型中极重要的参数,根据其随溶液电导率和温度的变化关系可以计算求得;m′和n′是计算泥质砂岩储层含油饱和度的重要参数,它们均随岩性的不同而变化,岩性细,m′和n′指数小,岩性粗,m′和n′指数大;和是W-S饱和度评价模型的基本参数,运用激发极化电位测井资料法、常规测井资料法、水分析法及正自然电位曲线法亦可分别求取。这些参数确定后,即可将W-S模型应用于常规的数字处理。应用效果表明,对于泥质砂岩储层,W-S模型能够提供可靠的储层饱和度,进行烃与非烃储层的判断。

W-S model could be used to calculate the oil saturation of argillaceous sand stone reservoir.The equation is as follows: =(1/F′)(+B),=(/F′)(+ (/)) B is an important parameter and could be calculated according to the relation between solution conductivity and temperature T;m′ and n′ are parameters that vary with lithology; and are basic parameters of W-S model,and could be calculated by using excited polarizing potential log data,conventional log data,formation water analysis and positive spontaneous potential curve respectively.Then use W-S model to process these parameters and the oil saturation of argillaceous sandstone reservoir could be calculated.The results are proved to be reliable and could be used to distingush between hydrocarbon reservoir and nonhydrocarbon reservoir.

10.11743/ogg20000406