【摘要】：濟(jì)源凹陷位于豫西北的濟(jì)源、沁陽(yáng)、孟縣、武陟、博愛(ài)等市、縣境內(nèi),南臨黃河,北靠太行山,凹陷呈東西向延伸,面積約2800km2。在構(gòu)造上屬于南華北盆地的一部分,位于濟(jì)源—黃口坳陷帶西端,是一個(gè)在以前中生界為主體的、近東西走向構(gòu)造格架上形成的中、新生界疊合盆地。本文在大量收集有關(guān)濟(jì)源凹陷沉積特征、構(gòu)造演化和烴源巖評(píng)價(jià)等研究成果的基礎(chǔ)上,利用相關(guān)鉆井、測(cè)錄井以及各項(xiàng)分析化驗(yàn)等資料,對(duì)研究區(qū)的烴源巖、儲(chǔ)蓋組合、圈閉等成藏條件進(jìn)行了分析研究,認(rèn)為本區(qū)具有較好的烴源條件：上三疊統(tǒng)譚莊組烴源巖較好,以Ⅱ2為主,Ⅱ1型次之；其次是下侏羅統(tǒng)鞍腰組和中侏羅統(tǒng)馬凹組,屬于較好—較差烴源巖,以Ⅱ2為主,Ⅱ1、Ⅲ型次之,且均達(dá)到成熟—高成熟。同時(shí),在烴源巖及原油飽和烴氣相色譜、飽和烴色-質(zhì)譜分析的基礎(chǔ)之上,分別從烴源巖及原油正構(gòu)烷烴分布特征、甾萜烷組成特征以及甾萜烷參數(shù)等幾個(gè)方面進(jìn)行油源對(duì)比研究,認(rèn)為研究區(qū)鄧2井原油為混合來(lái)源,即譚莊組和鞍腰組烴源巖均為其油源。依據(jù)古溫標(biāo)數(shù)據(jù)、烴源巖地化分析成果,利用熱演化模擬軟件模擬了濟(jì)源凹陷熱史,并進(jìn)一步模擬了中生界烴源巖的成熟史。烴源巖熱史和生烴史恢復(fù)結(jié)果表明,研究區(qū)熱流值從古至今整體變化為先上升后下降的趨勢(shì),中侏羅世末為60mW/m2左右,受燕山運(yùn)動(dòng)的影響熱流值持續(xù)升高,到早白堊世末上升到80mW/m2左右,其后盆地進(jìn)入裂陷沉降階段,熱流值開始降低,到漸新世末下降到55mW/m2左右,隨后熱流值趨于平穩(wěn),現(xiàn)今為45～50 mW/m2；第一次生烴時(shí)間在165-163Ma,在157Ma達(dá)到生烴高峰,156Ma之后初次生烴終止；第二次生烴時(shí)間在115-100Ma,105-98Ma達(dá)到生烴高峰,96Ma時(shí)因地層抬升生烴中斷,譚莊組烴源巖在局部地區(qū)可以三次生烴,26Ma達(dá)到生油高峰,23Ma受第1Ⅱ幕喜山運(yùn)動(dòng)影響,地層抬升生烴中斷,且烴源巖成熟度大致上呈現(xiàn)從中央隆起帶向兩側(cè)(溫縣次凹和沁陽(yáng)次凹)演化程度增高的趨勢(shì)。利用流體包裹體測(cè)試資料對(duì)油氣的充注時(shí)期進(jìn)行分析揭示研究區(qū)烴類包裹體熒光顏色有黃綠、藍(lán)綠和藍(lán)色三種,說(shuō)明至少發(fā)生過(guò)三幕油氣充注；同時(shí)部分樣品中檢測(cè)到固態(tài)瀝青,說(shuō)明該地區(qū)早期充注的油藏遭受過(guò)破壞。最后結(jié)合油源對(duì)比分析結(jié)果,利用精細(xì)埋藏史-熱史投影獲取各個(gè)幕次所對(duì)應(yīng)的的成藏時(shí)間：第一期成藏時(shí)間為163Ma左右,但可能已經(jīng)被破壞；第二期成藏時(shí)間為101-95Ma,為烴源巖二次生烴的結(jié)果；第三期成藏時(shí)間為27-23.8Ma。
[Abstract]:Jiyuan sag is located in Jiyuan, Qinyang, Mengxian, Wuzhi, Boai and other cities in northwest Henan Province. It is bounded by the Yellow River in the south and Taihang Mountain in the north. The sag extends east-west with an area of about 2800km2. Structurally a part of the South North China Basin located at the western end of the Jiyuan-Huangkou Depression it is a Mesozoic and Cenozoic superimposed basin formed on the tectonic framework of the East-West strike in the former Mesozoic. On the basis of collecting a large number of research achievements on sedimentary characteristics, structural evolution and source rock evaluation of Jiyuan sag, this paper makes use of relevant drilling, logging and various analysis and laboratory data to study the hydrocarbon source rock and reservoir cap assemblage in the study area. It is concluded that the source rocks of the Upper Triassic Tanzhuang formation are better, with 鈪，

本文編號(hào)：2210472