本文關(guān)鍵詞： 有效烴源巖 熱演化 排烴強(qiáng)度 延長(zhǎng)組 三疊系 隴東地區(qū) 鄂爾多斯盆地　出處：《石油實(shí)驗(yàn)地質(zhì)》2017年01期 　論文類型：期刊論文

【摘要】：通過烴源巖地球化學(xué)數(shù)據(jù)分析、測(cè)井有機(jī)碳計(jì)算、生烴潛力法及生排烴史模擬,研究了鄂爾多斯盆地隴東地區(qū)長(zhǎng)7段有效烴源巖的分布、生排烴史及排烴強(qiáng)度。長(zhǎng)7段有機(jī)碳含量大于1.0%的暗色泥巖(含油頁(yè)巖)厚度主要為20~90 m,平均有機(jī)碳含量主要介于2%~9%,其有效烴源巖分布以w(TOC)=1.0%和Ro=0.7%為界限,具有大面積廣覆式分布的特征;長(zhǎng)7段有效烴源巖在侏羅紀(jì)末期開始成熟生烴,主要在早白堊世早期(140~130 Ma,Ro≈0.7%)開始排烴,至早白堊世末期(100 Ma)達(dá)到生排烴高峰(Ro≈1.0%),最大產(chǎn)油率接近400 mg/g,排油率達(dá)308 mg/g,晚白堊世以來的區(qū)域性構(gòu)造抬升使得生烴停止;長(zhǎng)7段有效烴源巖排烴強(qiáng)度主要分布于(10~250)×104t/km~2,具有強(qiáng)排烴特征,以長(zhǎng)6—長(zhǎng)8段致密油為主的延長(zhǎng)組油藏主要分布于排烴強(qiáng)度大于20×10~4t/km~2的地區(qū),油氣具有近源短距離富集的特點(diǎn)。
[Abstract]:Based on the geochemical data analysis of source rocks, well logging organic carbon calculation, hydrocarbon generation potential method and hydrocarbon generation and expulsion history simulation, the distribution of effective source rocks in Chang7 member of Longdong region, Ordos Basin, is studied. Hydrocarbon generation and expulsion history and hydrocarbon expulsion intensity. The thickness of dark mudstone (oil shale) with organic carbon content greater than 1.0% in Chang 7 is mainly 20 ~ 90 m, and the average organic carbon content is mainly between 2 ~ 9%. The effective source rocks are distributed in the range of 1.0% and 0.7% of the available hydrocarbon source rocks. The source rocks of the Chang 7 member began to mature in late Jurassic, mainly in the early Cretaceous (140 ~ 130 Ma Ro 鈮，

本文編號(hào)：1530617