测井资料在小洼油田盖层评价中的应用

Application of well - log information to caprock evaluation in Xiaowa oilfield.

针对辽河油区小洼油田储、盖层及其测井响应特点,在取心资料不足的情况下,从测井资料中提取定量评价盖层封盖质量的参数,建立了该区盖层封盖质量类型的评价标准及权值。通过实际应用,同时计算盖层质量参数与储层解释参数,应用灰色系统理论集成和归纳了储、盖层的多种信息,利用测井资料研究了盖层质量、物性封闭和综合评价,分析了不同质量盖层及其储盖组合特点和关系,阐明了油气层分布规律。将测井采集的大量信息,系统、有序地转变为有利于盖层精细评价解释的信息,扩大了测井资料的应用领域,提高了测井解释符合率。

Based on the characteristics of the reservoir - caprock and its logging response of the Xiaowa oilfield in Liaohe petroliferous province, the parameters for quantitative evaluation of the caprocksealing quality were extracted from the well - log data under the situation of the shortage of core data, and the evaluation standard and weight value of the types for the caprocksealing quality in this area have been established. Through the actual application of caprock evaluation, the quality parameter of the caprock and interpretive parameter of the reservoir were computed at the same time. Gray system was used to integrate and induce many kinds of information of the reservoirs and caprocks, and the caprock quality, sealing of physical property and comprehensive evaluation were studied with the logging information.Different- quality caprocks and combination characteristics and relation with the reservoirs were analyzed,and hydrocarbon distribution rule was clarified. Thus, a lot of information extracted from well logging was transformed systematically in turn to that beneficial to fine evaluative interpretation of the caprocks, which has enlarged applied field of logging data, and improved coincidence rate of the logging interpretation.