下刚果盆地下白垩统Albian阶碳酸盐台地地震沉积学

发布时间：2018-11-18 18:59

【摘要】：在构造-沉积模式理论指导下,综合利用钻井岩心、测井和三维地震资料,探讨下刚果盆地下白垩统Albian阶碳酸盐岩沉积体系的地震沉积学特征及有利储层发育相带的空间展布和演化规律,为有利区块预测和勘探目标优选提供地质依据。结果表明:下刚果盆地A区块及邻区Albian阶可归纳出3种混积相和6种亚相及更多的微相类型;在建立混积相沉积模式的基础上,确定了滩体生长期次、方向和古地貌高,明确了A区块及邻区块重点层段滩体发育演化规律,精细恢复了SQ2和SQ3层序沉积演化史,识别出各层序内部演化特征和有利储层发育相带分布规律。提出了井震一体化多尺度融合研究思路,系统建立了下刚果盆地Albian阶三维沉积动态演化模式,论证了"台沟控带、台缘控滩、滩控储层"的优势相带和储层发育机理。
[Abstract]:Under the guidance of tectonic-sedimentary model theory, comprehensive use of drilling core, logging and three-dimensional seismic data, This paper discusses the seismic sedimentological characteristics of the lower Cretaceous Albian stage carbonate sedimentary system in the Lower Congo Basin and the spatial distribution and evolution of the favorable reservoir development facies belt, which provides the geological basis for the prediction of favorable blocks and the optimal selection of exploration targets. The results show that there are three kinds of mixed facies, six subfacies and more microfacies types in the Albian level of block A and adjacent areas in Basic-Congo basin. On the basis of establishing the mixed facies sedimentary model, the beach body growth period, direction and paleogeomorphology are determined, and the development and evolution rules of the beach body in the A block and the adjacent block are defined, and the evolution history of SQ2 and SQ3 sequence deposition is recovered fine. The internal evolution characteristics of each sequence and the distribution law of favorable reservoir developed facies zone are identified. In this paper, the author puts forward the research idea of multi-scale integration of well and earthquake, systematically establishes the three-dimensional sedimentary dynamic evolution model of Albian stage in Bas-Congo basin, and proves the dominant facies belt and reservoir development mechanism of "Taigou controlled zone, platform edge controlled beach and shoal controlled reservoir".
【作者单位】：中海石油(中国)有限公司北京研究中心;油气藏地质及开发工程国家重点实验室(成都理工大学);
【基金】：国家科技重大专项(2011ZX05030-003-02,2016ZX05032-001-004)
【分类号】：P618.13;P631.4

【共引文献】