本文選題：碳酸鹽 + 成因機理��； 參考：《石油學報》2017年12期

【摘要】：利用巖心、薄片、全巖礦物組分、元素、同位素等資料,對東營凹陷沙河街組四段上亞段—沙河街組三段下亞段深湖相烴源巖中碳酸鹽成因機理進行了研究,認為深湖主要發(fā)育透鏡狀粗晶、紋層狀微細晶、紋層狀隱晶和塊狀隱晶4種類型碳酸鹽。其中,透鏡狀粗晶碳酸鹽為成巖重結(jié)晶的產(chǎn)物;紋層狀微細晶碳酸鹽和紋層狀隱晶碳酸鹽為藻類光合作用不斷從水中萃取CO_2,導致水體CO_3~(2-)濃度升高,與湖水表層攜帶的Ca~(2+)相互作用的產(chǎn)物,咸水環(huán)境有利于碳酸鹽晶粒保存,碳酸鹽多呈微細晶紋層狀分布,微咸水環(huán)境水體較深,碳酸鹽晶粒在碳酸鹽補償深度面以下通常會發(fā)生溶蝕,大多呈隱晶紋層狀保存下來;塊狀隱晶碳酸鹽是淺水地帶沉積碳酸鹽由重力流搬運至深水地帶的產(chǎn)物。碳酸鹽一定程度上控制了東營凹陷沙河街組四段上亞段—沙河街組三段下亞段泥頁巖的儲集性和可壓性,也將為古湖泊沉積環(huán)境恢復提供重要信息。
[Abstract]:Based on the data of core, thin slice, mineral components, elements and isotopes of whole rock, the mechanism of carbonate genesis in deep lacustrine source rocks of the fourth member of Shahejie formation in Dongying Sag and the lower part of the third member of Shahejie formation is studied. It is considered that four types of carbonate are mainly developed in the deep lake, which are lenticular coarse crystal, lamellar fine grain, lamellar cryptic grain and block cryptic crystal. Among them, lenticular coarse crystalline carbonate is the product of diagenetic recrystallization, and lamellar microcrystalline carbonate and lamellar cryptosectic carbonate are algae photosynthesis, which continuously extract CO _ 2 from water, resulting in the increase of water CO _ 3O _ 3 ~ (2) concentration. The product of interaction with Ca~(2) in the surface layer of lake water, salt water environment is favorable for the preservation of carbonate grain, carbonate is mostly distributed in fine grained layer, and the water body is deep in brackish water environment. Carbonate grains usually dissolve below the depth of carbonate compensation, most of them are preserved in cryptmorphic layers, and massive cryptocrystalline carbonate is the product of sedimentary carbonate transported from gravity current to deep water zone in shallow water zone. To some extent, carbonate controls the reservoir and compressibility of shale from the upper submember of the fourth member of Shahejie formation to the third member of Shahejie formation in Dongying Sag, which will also provide important information for the restoration of sedimentary environment of palaeolake.
【作者單位】： 中國石油化工股份有限公司勝利油田分公司勘探開發(fā)研究院;中國石油化工股份有限公司勝利油田分公司;
【基金】：國家重點基礎研究發(fā)展計劃(973)項目(2014CB239100)資助
【分類號】：P618.13

【相似文獻】

相關(guān)期刊論文 前10條

1 陳以健,Henry Polach;沉積物中碳酸鹽~(14)C年齡的可靠性[J];海洋地質(zhì)與第四紀地質(zhì);1987年02期

2 陳秀玲;張文開;肖寶玉;;黃土中碳酸鹽的研究進展[J];新疆有色金屬;2008年04期

3 賈振遠;深水碳酸鹽(上)[J];地質(zhì)科技情報;1982年01期

4 D. H. Zenger ,陸杰;1981年碳酸鹽概況[J];地質(zhì)地球化學;1983年05期

5 謝展,胡文海;碳酸鹽沉積研究中的幾個問題[J];中國地質(zhì);1985年08期

6 方念喬;劉豪;李琦;張維;丁旋;;南海新生代碳酸鹽沉積與區(qū)域構(gòu)造演化[J];地學前緣;2013年05期

7 im治，

本文編號：1890070