本文選題：長江三角洲 + 啟東　； 參考：《高校地質(zhì)學(xué)報(bào)》2017年04期

【摘要】：根據(jù)鉆井巖心、古生物、有機(jī)巖石學(xué)觀察及有機(jī)地化測試數(shù)據(jù)分析,結(jié)合區(qū)域地質(zhì)背景資料,對長江三角洲啟東地區(qū)ZK01井全新統(tǒng)地層中兩套氣源巖的沉積特征、有機(jī)質(zhì)豐度、有機(jī)質(zhì)類型、有機(jī)質(zhì)成熟度等有機(jī)地球化學(xué)特征進(jìn)行了系統(tǒng)研究,探討控制研究區(qū)淺層生物氣生成的主要因素。結(jié)果表明,全新統(tǒng)河口灣—河漫灘相灰色黏土及粉砂質(zhì)黏土中有機(jī)碳含量在0.20%~0.65%之間,平均0.46%,氯仿瀝青"A"平均值71.71×10~(-6);淺海相深灰色淤泥質(zhì)黏土有機(jī)碳含量在0.19%~0.52%之間,平均0.34%,氯仿瀝青"A"平均值65.69×10~(-6);前者有機(jī)質(zhì)豐度略高于后者,生氣能力略強(qiáng)于后者。兩套氣源巖中有機(jī)質(zhì)來源均由低等水生生物和陸源高等植物兩部分組成,屬于混源輸入,且以陸源高等植物有機(jī)質(zhì)為主,有機(jī)質(zhì)類型為含草本腐殖型、含草本腐泥腐殖型。兩套氣源巖鏡質(zhì)體反射率(Ro)在0.50%~0.65%之間,正構(gòu)烷烴奇偶優(yōu)勢明顯,熱解最大峰溫峰多數(shù)低于435℃,表明有機(jī)質(zhì)處于未成熟階段。長江三角洲啟東地區(qū)具有有利于淺層生物氣生成的基礎(chǔ)地質(zhì)條件、物質(zhì)條件、地球化學(xué)條件,這些因素相互作用,相互制約,相互補(bǔ)充。
[Abstract]:According to the data of drilling core, paleontology, organic petrology and organic geochemical testing, combined with regional geological background data, the sedimentary characteristics and abundance of organic matter of two sets of gas source rocks in the new formation of ZK01 well in Qidong area, Yangtze River Delta are studied. The organic geochemical characteristics such as the type of organic matter and the maturity of organic matter were systematically studied and the main factors controlling the formation of shallow biogas in the study area were discussed. The results show that the organic carbon content of grey clay and silty clay in the Holocene estuarine and floodplain facies is between 0.20% and 0.65%, the average is 0.46%, the average value of chloroform asphalt "A" is 71.71 脳 10 ~ (-6), and the content of organic carbon in shallow sea dark gray silt clay is 0.190.52%. The average value of chloroform asphalt "A" is 65.69 脳 10 ~ (-6), the organic matter abundance of the former is slightly higher than that of the latter, and the gas generating ability of the former is slightly stronger than that of the latter. The source of organic matter in the two sets of gas source rocks is composed of two parts of low aquatic organisms and terrestrial higher plants, which belong to mixed source input and are mainly organic matter of terrestrial higher plants. The organic matter types are herbaceous humic type and herbaceous saprophytic mud humus type. The vitrinite reflectance (Ro) of two sets of gas source rocks is between 0.50% and 0.65%, and the odd-even advantages of n-alkanes are obvious, and most of the peak temperature peaks of pyrolysis are lower than 435 鈩，

本文編號：2080081