储层含水性与有效性的录井识别方法——以东营凹陷北部陡坡带为例

Research on reservoir aquosity and reservoir validity identification based on mud-logging method——case of northern slope bell of Dongying sag

"十一五"以来,济阳坳陷的勘探逐渐迈向深层,深层油水系统复杂,纵向上多套储层叠置,横向上岩性变化较快。储层的含水性和有效性识别对油水系统划分、勘探开发决策具有重要的意义。通过试验和资料对比分析,根据核磁共振录井新鲜样与浸泡样谱图的对比结果及综合录井仪钻井液出口和入口电导率的对应变化关系来识别储层含水性;利用核磁共振录井物性参数、岩石热解地化参数及定量荧光录井含油气丰度因子识别有效储层。达到了通过录井手段随钻识别储层含水性和储层有效性的目的,从而可以准确预测产层类型及压裂前后地层出水情况,将东营凹陷北部陡坡带深层砂砾岩体的油气层综合解释符合率从73.5%提高到了91.9%。

Since the'Elcventh Five'.the exploration of Jiyang Depression has entered the deep stage with complex and multiple oil and water system that is characterized by layers over-stacking vertically and lithology varied horizontally.The identification of oil from water is very important for the oil-water system division and exploration decision.and it is still pending to be resolved.Based on the experiment and data analysis.two methods have been proposed to identify reservoir quality.that is,the spectra comparison be-tween MR-ML origin sample and soaked sample and variability of outlet and inlet conductivity.Moreover,two methods have been presented to identify effective reservoir,that is.the MR-ML petrophysics parameters and oiliness abundance factor of rock py-rologger and QFT.Depending on the methods above.it is hitherto feasible to identify reservoir oil from water and reservoir quali-ty while drilling by mud-logging methods.and we can correctly evaluate types of pay formation and water yield formation before and after fracturing.Based on the research and subsequent methods,the coincidence rate of hydrocarbon zone interpretation has been improved from 73.5% to 91.9%.