临南洼陷南部沙三段下亚段储层综合评价

Comprehensive evaluation of lower Sha3 reservoir in south Linnan Depression

以录井和测井资料为基础,通过岩心观察、薄片鉴定、物性分析和扫描电镜观察等技术手段,深入研究了临南洼陷南部沙三段下亚段碎屑岩储层的宏观展布特征和微观特征。研究结果表明,储层的沉积微相、埋深以及溶蚀作用是影响储层物性的主要因素。影响储层产能的主要因素是储层的物性和埋深,通过对产能影响因素的分析,确定了研究区的有效储层下限及评价标准,并对沙三段下亚段储层进行了综合评价和分类,具体确定了有利储集相带的分布范围,形成了一套适合临南洼陷的储层综合评价方法。储层综合评价结果表明:Ⅰ类和Ⅱ类储层为有效储层,一般能获得较好的工业产能。因此,Ⅰ类和Ⅱ类储层发育区为研究区构造-岩性油气藏的有利勘探区。

Based on mud logging and well logging data,the macroscopic distribution features and microscopic features of lower Sha3 reser-voir in south Linnan Depression were researched thoroughly by means of cores observation,thin section analysis,physical proper-ties analysis and electronic scanning.The main influencing factors of reservoir physical properties are sedimentary microfacies,buried depth and corrosion of the reservoirs.The influencing factors of reservoir productivity are reservoir physical properties and buried depth.Based on that,the lower limit and evaluation standard of the effective reservoir were recognized,and the evaluation and division were made to the lower Sha3 reservoir.Distribution range of the favorable reservoir facies was confirmed.A reservoir evaluation method has been established for Linnan Depression.The results show that reservoir of type I and II are the effective ones achieving good productivity,and the reservoir of type I and II are the favorable exploratory areas with structural-lithologic hydrocarbon reservoirs in the studied area.