北黄海盆地上侏罗统烃源岩测井评价

发布时间：2018-07-10 10:41

本文选题：烃源岩 + 测井评价　；参考：《断块油气田》2017年06期

【摘要】：北黄海盆地尚处于勘探早期,盆地内烃源岩厚度巨大,但钻井取心较少,测试样品有限,难于对该区的烃源岩条件作出整体评价。文中结合地层沉积特征和地球化学测试数据,利用Δlog R技术,根据有机质在测井曲线上的响应特征,考虑岩性组合的差异,建立了适合研究区不同岩性组合的2种有机质丰度测井解释模型,获得钻井剖面上连续分布的总有机碳质量分数信息。研究表明:北黄海盆地东部坳陷上侏罗统烃源岩发育,上部J3SQ2层序中烃源岩厚度50~300 m,坳陷中心总有机碳质量分数大部分高于1.5%;下部J3SQ1层序中烃源岩厚度50~200 m,总有机碳质量分数0.5%~2.0%。2套层序中烃源岩总有机碳质量分数均表现出由坳陷中心向四周降低的特征。整体上,研究区上侏罗统烃源岩以中等烃源岩为主,具有生成油气的物质基础,邻近生烃中心的构造带应具有较好的勘探前景。
[Abstract]:The northern the Yellow Sea basin is still in the early exploration, and the source rock in the basin is very thick, but the drilling core is less and the test sample is limited. It is difficult to make an overall evaluation of the source rock conditions in this area. In this paper, the characteristics of the response of the roots to the logging curve are considered, and the roots have the characteristics on the logging curve with the sedimentary characteristics and geochemistry test data. 2 kinds of organic matter abundance logging interpretation models suitable for different lithologic assemblages in the study area are established to obtain the continuous distribution of total organic carbon content information on the drilling section. The study shows that the upper Jurassic source rocks in the eastern depression of the north the Yellow Sea basin are developed, the source rocks of the upper J3SQ2 sequence are 50~300 m, and the depression centers are always in the center. The mass fraction of organic carbon is mostly higher than 1.5%, the source rock of the lower J3SQ1 sequence is 50~200 m, and the total organic carbon content of the source rocks in the total organic carbon content 0.5%~2.0%.2 sequence is characterized by the reduction of the center of the depression from the depression center to four weeks. The material base near the hydrocarbon generating center should have a good exploration prospect.
【作者单位】：广州海洋地质调查局国土资源部海底矿产资源重点实验室;中山大学地球科学系;
【基金】：国家自然科学基金青年基金项目“北黄海盆地构造热机制与成烃效应”(41302100)
【分类号】：P618.13;P631.81

【相似文献】