發(fā)布時間：2018-03-24 00:11

  本文選題：玉北地區(qū)　切入點：烴源巖　出處：《現(xiàn)代地質(zhì)》2017年02期

【摘要】：根據(jù)地層分層數(shù)據(jù)和古熱流分析,對塔里木盆地玉北地區(qū)的5口代表性鉆井進行了埋藏史、熱史的模擬與分析,探討了研究區(qū)烴源巖的熱演化成熟過程,初步劃分了烴源巖的成熟階段和生烴期次。研究結(jié)果認為:玉北地區(qū)寒武系-泥盆系沉積時期,具有多次沉積埋藏和隆升剝蝕的交替;泥盆系沉積之后,石炭-二疊系呈現(xiàn)沉積埋藏的特征;中生代在玉北地區(qū)東部少量沉積三疊系,隨后被剝蝕,而在中西部發(fā)生沉積間斷;進入新生代,地層持續(xù)沉積,且沉積速率呈現(xiàn)增大趨勢。研究區(qū)寒武系烴源巖自沉積以來成熟度演化相對連續(xù),奧陶紀時進入生烴門限,成熟時期較早;志留-泥盆紀,受海西早期運動的影響,發(fā)生隆升剝蝕作用,烴源巖演化變緩;石炭-二疊紀受控于區(qū)域上持續(xù)穩(wěn)定的地層沉積與廣泛發(fā)育的火山活動,研究區(qū)寒武系烴源巖進入中高成熟階段;由于喜馬拉雅造山運動的遠程效應(yīng),新生代研究區(qū)持續(xù)沉降,形成巨厚沉積,烴源巖成熟度達到高-過成熟,為天然氣生成階段。
[Abstract]:Based on stratigraphic stratification data and paleo-heat flow analysis, the burial history and thermal history of five representative drilling wells in Yubei area of Tarim Basin are simulated and analyzed, and the thermal evolution and maturation process of source rocks in the study area are discussed. The maturation and hydrocarbon generation stages of the source rocks are preliminarily divided. The results show that the Cambrian-Devonian sedimentary periods in the north of Yubei area are alternately buried and uplifted and denuded after the Devonian deposits. Carboniferous-Permian shows sedimentary burial characteristics; Mesozoic in the eastern part of Yubei area, a small amount of sedimentary Triassic, then denudated, and then occurred in the central and western sedimentary discontinuity; into the Cenozoic, the strata continue to deposit, The sedimentary rate of Cambrian source rocks in the study area has been relatively continuous since deposition, and entered the threshold of hydrocarbon generation in Ordovician and matured earlier, and Silurian Devonian was affected by the early Hercynian movement. Carboniferous-Permian is controlled by the continuous and stable stratigraphic deposits and extensive volcanic activities in the study area, and the Cambrian source rocks in the study area have entered the middle and high maturity stage. Due to the remote effect of Himalayan orogenic movement, the Cenozoic study area continued to settle, forming a very thick deposit, and the maturity of the source rocks reached high to over-mature, which was the stage of natural gas generation.
【作者單位】： 中國石油大學(xué)(北京)油氣資源與探測國家重點實驗室;中國石油大學(xué)(北京)盆地與油藏研究中心;臨沂大學(xué)地質(zhì)與古生物研究所;中國石化西北油田分公司;
【基金】：國家自然科學(xué)基金項目(41572105,41172125) 國家重點基礎(chǔ)研究發(fā)展計劃項目(2012CB214804) 國家科技重大專項(2011ZX05002-003-001) 中國石油化工股份有限公司項目(P14131,P11086)
【分類號】：P618.13

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