春风油田沙湾组砾岩层特征及测井定量识别
发布时间：2018-12-14 19:34
【摘要】：春风油田沙湾组发育多套砾岩层,具有火山岩砾石成分多,钙质胶结程度高和放射性强的特点。基于对目的层的岩心和薄片观察、微量元素分析和测井资料解释,研究了春风油田沙湾组砾岩层特征和测井定量识别方法。结果表明,研究层段为多物源近岸水下扇沉积体系,其砾岩层为扎伊尔山石炭—二叠系物质被洪水搬运至湖盆所形成的产物。砾岩层段铀元素质量分数大于23.2μg/g,在地下水流动过程中发生还原反应释放大量的碳酸根离子,为钙质胶结提供有利的条件。利用常规测井曲线,建立砾岩层识别图版和函数识别全区砾岩层,认为研究区存在3个物源入湖区,主体沿西北—东南方向展布,砾岩层呈多期次分布且逐渐向东南迁移,反映了湖退以及水下河道向东南方向逐步推进的过程。
[Abstract]:There are many sets of conglomerate beds in Shawan formation of Chunfeng Oilfield, which are characterized by many volcanic gravel compositions, high calcareous cementation and strong radioactivity. Based on the observation of core and slice, trace element analysis and log data interpretation, the characteristics of conglomerate and logging quantitative identification method of Shawan formation in Chunfeng Oilfield are studied. The results show that the study layer is a multi-source near-shore underwater fan system, and its conglomerate is the product of Carboniferous and Permian materials transported to the lake basin by flood in Zaire Mountain. The mass fraction of uranium in the conglomerate formation is more than 23.2 渭 g / g, and a large amount of carbonate ions are released in the process of groundwater flow, which provides favorable conditions for calcium cementation. By using the conventional logging curve, the identification pattern of conglomerate layer and the function recognition of conglomerate layer in the whole area are established. It is considered that there are three sources in the study area, the main body distributes along the northwest to southeast direction, the conglomerate layer distributes in many periods and gradually moves to the southeast. It reflects the process of lake retreating and the underwater channel advancing to the southeast.
【作者单位】： 中国石油大学(华东)地球科学与技术学院;中国石化胜利油田分公司地质科学研究院;中国科学院油气资源研究重点实验室;中国科学院地质与地球物理研究所;
【基金】：国家自然科学基金项目“碳酸盐岩缝洞型输导体输导性能定量表征与评价”(41502149) 中国博士后科学基金项目“碳酸盐岩缝洞性储层充填物类型与储集性能评价”(2015M570148)
【分类号】：P618.13;P631.81
[Abstract]:There are many sets of conglomerate beds in Shawan formation of Chunfeng Oilfield, which are characterized by many volcanic gravel compositions, high calcareous cementation and strong radioactivity. Based on the observation of core and slice, trace element analysis and log data interpretation, the characteristics of conglomerate and logging quantitative identification method of Shawan formation in Chunfeng Oilfield are studied. The results show that the study layer is a multi-source near-shore underwater fan system, and its conglomerate is the product of Carboniferous and Permian materials transported to the lake basin by flood in Zaire Mountain. The mass fraction of uranium in the conglomerate formation is more than 23.2 渭 g / g, and a large amount of carbonate ions are released in the process of groundwater flow, which provides favorable conditions for calcium cementation. By using the conventional logging curve, the identification pattern of conglomerate layer and the function recognition of conglomerate layer in the whole area are established. It is considered that there are three sources in the study area, the main body distributes along the northwest to southeast direction, the conglomerate layer distributes in many periods and gradually moves to the southeast. It reflects the process of lake retreating and the underwater channel advancing to the southeast.
【作者单位】： 中国石油大学(华东)地球科学与技术学院;中国石化胜利油田分公司地质科学研究院;中国科学院油气资源研究重点实验室;中国科学院地质与地球物理研究所;
【基金】：国家自然科学基金项目“碳酸盐岩缝洞型输导体输导性能定量表征与评价”(41502149) 中国博士后科学基金项目“碳酸盐岩缝洞性储层充填物类型与储集性能评价”(2015M570148)
【分类号】：P618.13;P631.81
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