發(fā)布時(shí)間：2018-05-12 23:10

  本文選題：東濮凹陷 + 埋藏史��； 參考：《地質(zhì)與勘探》2016年03期

【摘要】：東濮凹陷是渤海灣盆地南緣極具油氣開采潛力的凹陷,本文揭示該凹陷新生代埋藏史、熱史及烴源巖演化史。利用凹陷各構(gòu)造單元18口井的鏡質(zhì)體反射率數(shù)據(jù),恢復(fù)其埋藏史、熱史。結(jié)果顯示,東濮凹陷經(jīng)歷"一升兩降"的構(gòu)造沉降,并具有"馬鞍型"的熱演化特征。自沙四段沉積開始至沙三段,地溫梯度逐漸增加,在沙三段沉積末期達(dá)到最大,為45.2℃~48℃/km。自沙二段沉積開始至今,地溫梯度總體逐漸降低,僅在東營(yíng)組沉積時(shí)期出現(xiàn)微弱回升,現(xiàn)今地溫梯度為30℃~34℃/km。以埋藏史和熱史為基礎(chǔ),結(jié)合構(gòu)造及有機(jī)地球化學(xué)資料,對(duì)東濮凹陷18口井烴源巖演化史進(jìn)行模擬。結(jié)果表明,烴源巖熱演化受東營(yíng)組沉積時(shí)期的古地溫控制,3套烴源巖成熟度均在27Ma(東營(yíng)組沉積時(shí)期)達(dá)到最大。
[Abstract]:Dongpu depression is a depression with great potential for oil and gas exploitation in the southern margin of Bohai Bay basin. This paper reveals the Cenozoic burial history, thermal history and source rock evolution history of the depression. Based on vitrinite reflectance data of 18 wells in each structural unit of depression, burial history and thermal history are restored. The results show that Dongpu sag experienced tectonic subsidence of "one liter and two drops" and has the characteristics of thermal evolution of "saddle type". The geothermal gradient increased gradually from the beginning of the deposition of the fourth member of the Shahejie formation to the third member of the formation, and reached the maximum at the end of the third member of the formation, which was 45.2 鈩，

本文編號(hào)：1880551