本文選題：柴達(dá)木盆地 + 扎哈泉��； 參考：《北京大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年01期

【摘要】：運(yùn)用沉積學(xué)、儲(chǔ)層地質(zhì)學(xué)和有機(jī)地球化學(xué)等手段,對(duì)最近在柴達(dá)木盆地扎哈泉地區(qū)新發(fā)現(xiàn)的致密油藏進(jìn)行研究。扎哈泉地區(qū)沉積相以濱淺湖的灘壩砂為主體,為致密油的形成打下了沉積學(xué)基礎(chǔ)。本區(qū)致密油的產(chǎn)狀特征是油層薄,與烴源巖呈薄互層產(chǎn)出,為近源自生自儲(chǔ)關(guān)系,提供了非常有利于致密油形成的源儲(chǔ)共生組合條件。致密油儲(chǔ)層致密,具有微米級(jí)孔隙和納米級(jí)孔隙,儲(chǔ)層平均孔隙度為5.8%,平均滲透率為0.45m D,屬于典型致密油藏。與致密油儲(chǔ)層互層的古近系烴源巖的有機(jī)質(zhì)類型以Ⅰ型和Ⅱ1型為主;Tmax在311~461oC之間,處于低熟至成熟階段。有機(jī)碳含量主要分布在0.29%~4.42%之間,但多數(shù)低于1.0%,比現(xiàn)階段致密油烴源巖的標(biāo)準(zhǔn)明顯偏低,屬于一種特殊類型。與其他盆地相比,雖然柴達(dá)木盆地扎哈泉地區(qū)致密油烴源巖有機(jī)質(zhì)豐度偏低,但該地區(qū)咸化湖泊環(huán)境使其具有生烴轉(zhuǎn)化率高的典型特點(diǎn),因此,同樣可以生成較多的液態(tài)烴類,預(yù)示柴達(dá)木盆地致密油勘探具有很大的潛力。
[Abstract]:By means of sedimentology reservoir geology and organic geochemistry the newly discovered compact reservoirs in Chahaquan area of Qaidam Basin were studied. The sedimentary facies in Zahaquan area are mainly beach and dam sand of shallow lake, which lays the sedimentological foundation for the formation of dense oil. The occurrence of dense oil in this area is characterized by thin oil layer and thin interbedded production with source rock, which provides a very favorable condition for source storage and symbiotic assemblage in the formation of dense oil. The tight oil reservoir is compact, with micrometer and nanometer porosity, the average porosity is 5.8 and the average permeability is 0.45m. it is a typical tight reservoir. The organic matter types of Paleogene source rocks interbedded with tight oil reservoirs are mainly type 鈪，

本文編號(hào)：2046972