本文選題：埋藏史 + 熱演化史��； 參考：《東北石油大學(xué)》2015年碩士論文

【摘要】：王府、德惠斷陷是松遼盆地的二級構(gòu)造單元,斷陷期地層從下到上為火石嶺組、沙河子組、營城組。本論文以有機(jī)質(zhì)豐度、有機(jī)質(zhì)類型、有機(jī)質(zhì)成熟度等作為烴源巖的地球化學(xué)特征評價的切入點(diǎn),結(jié)合地質(zhì)、地球物理和地球化學(xué)相關(guān)資料,用盆地模擬技術(shù)恢復(fù)研究區(qū)埋藏史,在埋藏史恢復(fù)的基礎(chǔ)上利用EASY%Ro原理結(jié)合三角函數(shù)熱流模型反演研究區(qū)的熱史,再結(jié)合有關(guān)動力學(xué)參數(shù)和烴源巖地球化學(xué)特征來計算生烴史。本論文取得了以下認(rèn)識:1、兩個斷陷有機(jī)質(zhì)豐度均達(dá)到很好的級別,營城組稍差。有機(jī)質(zhì)類型火石嶺組主要為Ⅱ型,營城組和沙河子組稍差。斷陷期地層成熟度Ro均在1.25%~1.75%之間,處于成熟~高成熟之間。2、兩個斷陷埋藏史相似。沙河子到營城組快速埋藏,營城末期地層抬升明顯,德惠斷陷比王府在此階段抬升幅度大,其程度由北向南剝蝕量越來越大。3、兩個斷陷熱演化史大致分成3個階段,斷陷期(火石嶺組~營城組)的由高地溫梯度到低地溫梯度的下降階段,地層溫度升溫較快;拗轉(zhuǎn)換期至坳陷期(登婁庫組至嫩江組初期)的地溫梯度緩慢上升階段,地層溫度快速升高;嫩江組初期達(dá)到最大埋深,對應(yīng)的地層溫度達(dá)到最高,反轉(zhuǎn)期的穩(wěn)定地溫梯度階段�，F(xiàn)今成熟度達(dá)到最高。4、結(jié)合之前的埋藏史、熱史、干酪根動力學(xué)參數(shù)及油裂解活化能參數(shù)可以得出:王府和德惠斷陷的火石嶺組的生烴主要成分是C6+,二者的生烴期相近,都是105Ma~75Ma之間,對應(yīng)于泉頭組時期和嫩江時期。生烴時間早,持續(xù)時間也短。沙河子組大量生氣期在115Ma~88Ma之間,對應(yīng)于泉頭組時期和姚家組末期。營城組在114Ma~84Ma之間。對應(yīng)于泉頭組末期和姚家組初期。兩個斷陷火石嶺組生油裂解時間相近,為90~70Ma之間�？紤]到熱史可知,裂解時間一定在生烴完成后,由于沉降史溫度會在后期升高,結(jié)合成烴和就近成藏因素,可知生成的油裂解所占比例是70%,油裂解門限在Ro=1.1%。
[Abstract]:Wangfu, Dehui fault depression is the secondary structural unit of Songliao basin. The strata in the faulted period from lower to upper are Huoshiling formation, Shahezi formation and Yingcheng formation. In this paper, the abundance of organic matter, the type of organic matter and the maturity of organic matter are taken as the entry points for the evaluation of geochemical characteristics of source rocks. The burial history of the studied area is restored by basin simulation technique, combining with the relevant data of geology, geophysics and geochemistry. Based on the restoration of burial history, the thermal history of the studied area is inversed by using EASY%Ro principle and trigonometric function heat flow model, and the hydrocarbon generation history is calculated by combining the relevant kinetic parameters and geochemical characteristics of source rocks. In this paper, we have obtained the following understanding: 1: 1, the abundance of organic matter in the two faulted subsidence reaches a good level, and the Yingcheng formation is a little poor. The organic matter type of Huoshiling formation is mainly type 鈪，

本文編號：1811396