發(fā)布時間：2018-12-14 19:34

【摘要】：春風(fēng)油田沙灣組發(fā)育多套礫巖層,具有火山巖礫石成分多,鈣質(zhì)膠結(jié)程度高和放射性強(qiáng)的特點�；趯δ康膶拥膸r心和薄片觀察、微量元素分析和測井資料解釋,研究了春風(fēng)油田沙灣組礫巖層特征和測井定量識別方法。結(jié)果表明,研究層段為多物源近岸水下扇沉積體系,其礫巖層為扎伊爾山石炭—二疊系物質(zhì)被洪水搬運至湖盆所形成的產(chǎn)物。礫巖層段鈾元素質(zhì)量分?jǐn)?shù)大于23.2μg/g,在地下水流動過程中發(fā)生還原反應(yīng)釋放大量的碳酸根離子,為鈣質(zhì)膠結(jié)提供有利的條件。利用常規(guī)測井曲線,建立礫巖層識別圖版和函數(shù)識別全區(qū)礫巖層,認(rèn)為研究區(qū)存在3個物源入湖區(qū),主體沿西北—東南方向展布,礫巖層呈多期次分布且逐漸向東南遷移,反映了湖退以及水下河道向東南方向逐步推進(jìn)的過程。
[Abstract]:There are many sets of conglomerate beds in Shawan formation of Chunfeng Oilfield, which are characterized by many volcanic gravel compositions, high calcareous cementation and strong radioactivity. Based on the observation of core and slice, trace element analysis and log data interpretation, the characteristics of conglomerate and logging quantitative identification method of Shawan formation in Chunfeng Oilfield are studied. The results show that the study layer is a multi-source near-shore underwater fan system, and its conglomerate is the product of Carboniferous and Permian materials transported to the lake basin by flood in Zaire Mountain. The mass fraction of uranium in the conglomerate formation is more than 23.2 渭 g / g, and a large amount of carbonate ions are released in the process of groundwater flow, which provides favorable conditions for calcium cementation. By using the conventional logging curve, the identification pattern of conglomerate layer and the function recognition of conglomerate layer in the whole area are established. It is considered that there are three sources in the study area, the main body distributes along the northwest to southeast direction, the conglomerate layer distributes in many periods and gradually moves to the southeast. It reflects the process of lake retreating and the underwater channel advancing to the southeast.
【作者單位】： 中國石油大學(xué)(華東)地球科學(xué)與技術(shù)學(xué)院;中國石化勝利油田分公司地質(zhì)科學(xué)研究院;中國科學(xué)院油氣資源研究重點實驗室;中國科學(xué)院地質(zhì)與地球物理研究所;
【基金】：國家自然科學(xué)基金項目“碳酸鹽巖縫洞型輸導(dǎo)體輸導(dǎo)性能定量表征與評價”(41502149) 中國博士后科學(xué)基金項目“碳酸鹽巖縫洞性儲層充填物類型與儲集性能評價”(2015M570148)
【分類號】：P618.13;P631.81

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