發(fā)布時間：2018-09-10 08:56

【摘要】：儲層中流體古壓力特征對刻畫油氣充注狀態(tài)具有指示意義,流體包裹體PVTx熱動力學(xué)模擬應(yīng)用包裹體組分、均一溫度和氣液比,結(jié)合模擬軟件可以恢復(fù)包裹體被捕獲時的古流體壓力,以塔里木盆地麥蓋提斜坡瑪南構(gòu)造帶鷹山組為例,首先應(yīng)用激光共聚焦掃描顯微鏡測量油包裹體氣液比,然后通過冷熱臺顯微測溫獲得流體包裹體均一溫度,最后通過熒光光譜儀,研究原油成熟度,綜合劃分了油氣充注幕次并恢復(fù)了各幕次流體古壓力,該應(yīng)用有效區(qū)分了不同幕次流體古壓力值。研究結(jié)果表明:瑪南構(gòu)造帶鷹山組存在2期油氣充注,第1期發(fā)生在海西中晚期,主要充注發(fā)橙色熒光的原油,其油包裹體均一溫度范圍43~59.2℃,伴生的同期鹽水包裹體均一溫度范圍58.1~85.3℃,古流體壓力為13.63~14.78 MPa,依據(jù)油包裹體熒光光譜參數(shù)判斷該期原油為低成熟原油;第2期發(fā)生在喜山期晚期,主要充注發(fā)黃綠色、藍綠色、藍白色熒光顏色的原油,其油包裹體均一溫度范圍66~142.3℃,伴生的同期鹽水包裹體均一溫度范圍95.4~189.2℃,古流體壓力為20.09~33.52 Mpa,該期原油為中—高成熟度。研究結(jié)果有助于深化勘探區(qū)油氣成藏規(guī)律的認識。
[Abstract]:The paleo-pressure characteristics of the fluid in the reservoir are instructive to describe the oil-gas filling state. The PVTx thermodynamics simulation of the fluid inclusion applies the inclusion component, homogenization temperature and gas-liquid ratio. Combined with simulation software, paleofluid pressure can be restored when inclusions are captured. Taking Yingshan formation of Manan structural belt on Maigeti slope in Tarim Basin as an example, the gas-liquid ratio of oil inclusions is first measured by laser confocal scanning microscope. Then the homogeneous temperature of fluid inclusions is obtained by means of microthermometer. Finally, the maturity of crude oil is studied by fluorescence spectrometer. The oil and gas injection episodes are comprehensively divided and the paleo-pressure of fluid is restored. This application effectively distinguishes the paleo-pressure values of different series fluids. The results show that the Yingshan formation of the Manan structural belt has two oil and gas filling stages, the first of which occurred in the middle and late Hercynian period, mainly filled with orange fluorescent crude oil, and the homogenization temperature of the oil inclusions was in the range of 4359.2 鈩，

本文編號：2233976