本文選題：東濮凹陷 + 熱歷史��； 參考：《地學(xué)前緣》2017年03期

【摘要】：東濮凹陷位于渤海灣盆地南緣,是中國典型的既富石油又富天然氣的凹陷之一。文中通過鏡質(zhì)體反射率恢復(fù)了9個構(gòu)造單元31口典型井的新生代熱歷史。研究結(jié)果表明:東濮凹陷各構(gòu)造單元的新生代熱歷史總的趨勢是一致的,并表現(xiàn)為"馬鞍型"特征,分別在沙三段沉積時期和東營組沉積中晚期達(dá)到地溫梯度高峰,其地溫梯度分別為45~48℃/km和39~40℃/km,兩期地溫梯度高峰揭示了東濮凹陷經(jīng)歷了沙三段沉積時期和東營組沉積中晚期強烈的裂陷運動;新近紀(jì)開始,凹陷進(jìn)入熱沉降階段,地溫梯度逐漸下降至現(xiàn)今的31~34℃/km。此外,研究成果還揭示了東濮凹陷烴源巖熱演化受東營組沉積時期的古地溫場控制。文中的研究成果可以為東濮凹陷深層油氣資源評價提供地?zé)峄A(chǔ)。
[Abstract]:Dongpu depression is located in the southern margin of Bohai Bay basin and is one of the typical oil and gas rich depressions in China. The Cenozoic thermal history of 31 typical wells in 9 tectonic units has been restored by vitrinite reflectance. The results show that the general trend of the Cenozoic thermal history of each tectonic unit in Dongpu depression is consistent, and it shows the characteristics of "Ma'an type", reaching the peak of geothermal gradient in the middle and late sedimentary periods of the third member of the Shahejie formation and the late stage of the Dongying formation, respectively. The geothermal gradient of Dongpu sag is 45 ~ 48 鈩，

本文編號：2094913