【摘要】：湖相碳酸鹽巖研究正處于不斷探索和認(rèn)識(shí)階段,近年來(lái)國(guó)內(nèi)外大量湖相碳酸鹽巖儲(chǔ)層的發(fā)現(xiàn),使主要借鑒海相碳酸鹽巖理論的湖相碳酸鹽巖研究得到關(guān)注和重視,并取得一定的成果和認(rèn)識(shí)。巴西桑托斯盆地白堊系藻疊層石礁是湖相碳酸鹽巖一種特殊的儲(chǔ)層類型,對(duì)于豐富湖相碳酸鹽巖理論具有重要意義。通過(guò)對(duì)地震剖面的振幅反射結(jié)構(gòu),鉆井巖性剖面,巖芯沉積結(jié)構(gòu)、構(gòu)造觀察,巖芯薄片孔滲及成巖分析,測(cè)井曲線反映的沉積物粒序變化及旋回組合特征等現(xiàn)象的綜合分析,總結(jié)出了白堊系藻疊層石礁的主要特征及主控因素。藻疊層石礁以疊層石為格架,藻類的黏結(jié)作用使其成為大面積連片發(fā)育的黏結(jié)礁,其孔滲發(fā)育,是良好的儲(chǔ)層。發(fā)育和分布主要受物源供給、古隆起、水體變化和藻類改造四種因素的控制。咸水環(huán)境下,在遠(yuǎn)離碎屑物源影響的水下古隆起上,水侵體系域時(shí)期,適應(yīng)環(huán)境較強(qiáng)的疊層石繁盛,藻類的黏結(jié)作用使其成為具有格架結(jié)構(gòu)的黏結(jié)礁,沿巴西桑托斯盆地東部隆起帶大面積發(fā)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.
【作者單位】： 中海油研究總院;洲際油氣股份有限公司新項(xiàng)目評(píng)價(jià)部;
【基金】：國(guó)家科技重大專項(xiàng)(2011ZX05030-002)~~
【分類號(hào)】：P618.13

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