發(fā)布時(shí)間：2019-03-14 16:57

【摘要】：應(yīng)用流體包裹體分析、盆地模擬和有機(jī)地球化學(xué)等手段,研究東海西湖凹陷平湖構(gòu)造帶超壓系統(tǒng)與油氣成藏的相互關(guān)系。研究結(jié)果表明:平湖構(gòu)造帶油氣主要來(lái)源于平湖組煤系源巖,而且油氣主成藏期為晚期,與生烴增壓的形成期大致相同,另外油氣藏多分布在超壓頂界面附近,這些均指示超壓與油氣成藏存在密切關(guān)系;鏡質(zhì)體反射率、地溫梯度及包裹體均一溫度反映的熱異常,儲(chǔ)層物性、非均一捕獲的包裹體、"氣煙囪"反映的流體壓力異常、凝析油輕烴組分反映的組分異常證實(shí)研究區(qū)流體在超壓主導(dǎo)下晚期高效率快速流體;高壓流體的泄壓排放誘發(fā)斷裂開(kāi)啟,并為流體運(yùn)移提供動(dòng)力,從而控制油氣在超壓界面附近高效成藏。
[Abstract]:By means of fluid inclusion analysis, basin simulation and organic geochemistry, the relationship between overpressure system and hydrocarbon accumulation in Pinghu structural belt of Xihu depression in the East China Sea is studied. The results show that the oil and gas in the Pinghu tectonic belt are mainly derived from the coal measure source rocks of the Pinghu formation, and the main reservoir forming period is late, which is about the same as that of hydrocarbon generation pressurization. In addition, most of the oil and gas reservoirs are distributed near the overpressure top interface. All of these indicate that there is a close relationship between overpressure and hydrocarbon accumulation. Vitrinite reflectivity, geothermal gradient and thermal anomalies reflected by homogeneous temperature of inclusions, reservoir physical properties, heterogeneous captured inclusions, fluid pressure anomalies reflected by "gas chimneys", The component anomalies reflected by the light hydrocarbon components of condensate oil confirm that the late high efficiency fast fluids in the study area are dominated by overpressure. The discharge of high pressure fluid leads to the opening of fracture and provides the power for fluid migration so as to control the high efficiency accumulation of oil and gas near the overpressure interface.
【作者單位】： 中國(guó)地質(zhì)大學(xué)構(gòu)造與油氣資源教育部重點(diǎn)實(shí)驗(yàn)室;河北地質(zhì)大學(xué)資源學(xué)院;甘肅省油氣資源研究重點(diǎn)實(shí)驗(yàn)室中國(guó)科學(xué)院油氣資源研究重點(diǎn)實(shí)驗(yàn)室;中國(guó)石油華北油田公司地球物理勘探研究院;中海油研究總院;中國(guó)石油華北油田公司科技信息處;
【基金】：國(guó)家重大科技專(zhuān)項(xiàng)(2011ZX05023-004-010)~~
【分類(lèi)號(hào)】：P618.13

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