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塔中井区主力产油层组东河砂岩为一巨厚的砂体,根据对岩心资料的观察发现其中隔夹层发育。由于受到砂体内隔夹层的阻渗影响,在油田生产过程中注水开采往往不能达到期望的效果。所以,研究东河砂岩的隔夹层对油田降低产水率、提高油气采收率有着重要意义。文中根据岩心资料与测井资料,将研究区隔夹层分为泥质隔夹层、物性隔夹层与钙质隔夹层三类进行研究。总结出了每一类隔夹层的测井响应特征,得出普遍适用的测井隔夹层识别方法,为油田挖潜提供测井地质支持。
The Donghe sandstone in the main oil-producing group of Tazhong well area is a thick sandbody. According to the observation of core data, it is found that the inter-sandstone is developed. Due to the barrier effect of interlayer sand in the sand body, water injection in the oilfield production process often can not achieve the desired effect. Therefore, it is of great significance to study the intercalation of Donghe sandstone to reduce the water production rate and the oil recovery. According to the core data and well logging data, the study divides the research into three types: intercalation of intercalation, interval of intercalation of interbeds and intercalation of calcareous interbeds. The log response characteristics of each type of intercalation are summed up, and the commonly used method of identifying intercalation layers is obtained, which provides logging geologic support for tapping potential in oil fields.