本文選題：非均質(zhì)性　切入點(diǎn)：演化模式　出處：《石油與天然氣地質(zhì)》2017年02期 　論文類型：期刊論文

【摘要】：通過巖心觀察和樣品測試數(shù)據(jù)綜合分析,在總結(jié)前人層序格架研究成果的基礎(chǔ)上,對(duì)渤海灣盆地濟(jì)陽坳陷渤南洼陷古近系沙河街組三段下亞段湖相泥頁巖的多重非均質(zhì)性特征和演化規(guī)律進(jìn)行研究。結(jié)果表明:沙三下亞段為一個(gè)三級(jí)層序,層序內(nèi)可識(shí)別出湖擴(kuò)體系域(EST)、早期高位體系域(EHST)和晚期高位體系域(LHST)。巖相組合、礦物組成、藻類化石、有機(jī)碳含量和有機(jī)質(zhì)類型都在沙三下亞段層序格架內(nèi)發(fā)生明顯的規(guī)律性變化。其中,巖相組合方面共識(shí)別出6種巖相類型,各巖相的礦物組成從EST到LHST,粘土礦物、石英和長石含量增加,方解石和白云石含量減少,黃鐵礦含量在EHST最高。藻類化石在LHST種類及豐度最為發(fā)育,有機(jī)碳含量在EST最低,有機(jī)質(zhì)類型以Ⅰ型和Ⅱ1型為主。沙三下亞段泥頁巖含油性受多重非均質(zhì)性特征綜合影響,對(duì)比分析認(rèn)為EHST含油性最好,同時(shí)也是最具潛力的頁巖油目的層段。
[Abstract]:Based on the comprehensive analysis of core observation and sample test data, and on the basis of summarizing the previous research results of sequence framework, The multilevel heterogeneity and evolution of lacustrine shale in Lower member 3 of Shahejie formation, Paleogene in Bonan Depression, Jiyang Depression, Bohai Bay Basin, have been studied. The results show that the lower submember of Sha 3 is a third order sequence. In the sequence, EST, EHST and LHST.lithofacies assemblage, mineral composition, algal fossils can be identified in the lacustrine extension system tracts, early high system tracts and late high system tracts. The organic carbon content and organic matter type all changed regularly in the sequence framework of the lower member of the lower part of Sha 3.Of6 lithofacies types were identified in the lithofacies assemblage, and the mineral composition of each lithofacies ranged from EST to LHST, clay minerals, clay minerals, clay minerals, clay minerals, clay minerals, clay minerals, clay minerals, clay minerals, clay minerals, and clay minerals. The contents of quartz and feldspar increased, calcite and dolomite decreased, pyrite content was highest in EHST, algal fossils were most developed in LHST species and abundance, and organic carbon content was the lowest in EST. The types of organic matter are mainly type I and type 鈪，

本文編號(hào)：1570931