巴西桑托斯盆地白垩系湖相藻叠层石礁特征及主控因素分析
发布时间：2018-10-31 08:23
【摘要】：湖相碳酸盐岩研究正处于不断探索和认识阶段,近年来国内外大量湖相碳酸盐岩储层的发现,使主要借鉴海相碳酸盐岩理论的湖相碳酸盐岩研究得到关注和重视,并取得一定的成果和认识。巴西桑托斯盆地白垩系藻叠层石礁是湖相碳酸盐岩一种特殊的储层类型,对于丰富湖相碳酸盐岩理论具有重要意义。通过对地震剖面的振幅反射结构,钻井岩性剖面,岩芯沉积结构、构造观察,岩芯薄片孔渗及成岩分析,测井曲线反映的沉积物粒序变化及旋回组合特征等现象的综合分析,总结出了白垩系藻叠层石礁的主要特征及主控因素。藻叠层石礁以叠层石为格架,藻类的黏结作用使其成为大面积连片发育的黏结礁,其孔渗发育,是良好的储层。发育和分布主要受物源供给、古隆起、水体变化和藻类改造四种因素的控制。咸水环境下,在远离碎屑物源影响的水下古隆起上,水侵体系域时期,适应环境较强的叠层石繁盛,藻类的黏结作用使其成为具有格架结构的黏结礁,沿巴西桑托斯盆地东部隆起带大面积发育。
[Abstract]:The study of lacustrine carbonate rocks is in the stage of continuous exploration and understanding. In recent years, the discovery of a large number of lacustrine carbonate reservoirs at home and abroad has attracted attention and attention to the study of lacustrine carbonate rocks, which mainly draws lessons from the theory of marine carbonate rocks. And achieved certain results and understanding. The algal stromatolite reef of the Cretaceous system in the Santos Basin of Brazil is a special reservoir type of lacustrine carbonate rock, which is of great significance for enriching the theory of lacustrine carbonate rock. Through the comprehensive analysis of amplitude reflection structure, drilling lithology profile, core sedimentary structure, structure observation, core sheet pore permeability and diagenesis analysis, sediment grain sequence change and cyclic assemblage characteristics reflected by logging curve, etc. The main characteristics and main controlling factors of the Cretaceous algal stromatolite reef are summarized. The algal stromatolite reef is composed of stromatolites, and the algal agglutination makes it become a large area of jointed reef, and its pore and permeability are developed, so it is a good reservoir. Development and distribution are mainly controlled by four factors: provenance, paleouplift, water body change and algae transformation. In brackish water environment, in the underwater paleouplift, which is far from the influence of clastic material source, during the period of water invasion system tract, stromatolite flourished in the strong environment, and the algal bonding made it become a cohesive reef with lattice structure. A large area developed along the eastern uplift zone of the Santos Basin, Brazil.
【作者单位】： 中海油研究总院;洲际油气股份有限公司新项目评价部;
【基金】：国家科技重大专项(2011ZX05030-002)~~
【分类号】：P618.13
[Abstract]:The study of lacustrine carbonate rocks is in the stage of continuous exploration and understanding. In recent years, the discovery of a large number of lacustrine carbonate reservoirs at home and abroad has attracted attention and attention to the study of lacustrine carbonate rocks, which mainly draws lessons from the theory of marine carbonate rocks. And achieved certain results and understanding. The algal stromatolite reef of the Cretaceous system in the Santos Basin of Brazil is a special reservoir type of lacustrine carbonate rock, which is of great significance for enriching the theory of lacustrine carbonate rock. Through the comprehensive analysis of amplitude reflection structure, drilling lithology profile, core sedimentary structure, structure observation, core sheet pore permeability and diagenesis analysis, sediment grain sequence change and cyclic assemblage characteristics reflected by logging curve, etc. The main characteristics and main controlling factors of the Cretaceous algal stromatolite reef are summarized. The algal stromatolite reef is composed of stromatolites, and the algal agglutination makes it become a large area of jointed reef, and its pore and permeability are developed, so it is a good reservoir. Development and distribution are mainly controlled by four factors: provenance, paleouplift, water body change and algae transformation. In brackish water environment, in the underwater paleouplift, which is far from the influence of clastic material source, during the period of water invasion system tract, stromatolite flourished in the strong environment, and the algal bonding made it become a cohesive reef with lattice structure. A large area developed along the eastern uplift zone of the Santos Basin, Brazil.
【作者单位】： 中海油研究总院;洲际油气股份有限公司新项目评价部;
【基金】：国家科技重大专项(2011ZX05030-002)~~
【分类号】：P618.13
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