本文選題：四川盆地　切入點：沉積特征　出處：《天然氣工業(yè)》2016年11期 　論文類型：期刊論文

【摘要】：四川盆地是新中國最早開展天然氣勘探開發(fā)和綜合利用的地區(qū),經(jīng)過半個多世紀(jì)的油氣勘探,共在24個地層層位中發(fā)現(xiàn)了油氣藏且以氣為主。為了預(yù)測該盆地各層系下一步天然氣勘探的方向和目標(biāo),系統(tǒng)總結(jié)了該盆地海相、陸相地層的沉積特征,分析了多旋回構(gòu)造運動不同的表現(xiàn)形式和對沉積、成巖及成藏的控制作用。結(jié)果表明:①自震旦紀(jì)以來,該盆地經(jīng)歷了從海相沉積向陸相沉積的轉(zhuǎn)變,以海相沉積為主:②多韻律沉積形成多套生—儲組合,縱向上具有多層系油氣成藏的特征;③多旋回構(gòu)造運動具有多種表現(xiàn)形式,對沉積、成巖及成藏具有明顯的控制作用。進(jìn)一步分析了油氣成藏特征及氣藏富集規(guī)律,結(jié)論認(rèn)為:①該盆地具有常規(guī)與非常規(guī)油氣藏共存、多層系供烴、多種儲層類型、多種圈閉類型、多期成藏、多種成藏模式等特征;②其天然氣的富集與烴源強(qiáng)度、大型古隆起、有利沉積相帶、沉積—構(gòu)造間斷面、構(gòu)造裂縫發(fā)育帶等因素有關(guān)。最后,結(jié)合油氣地質(zhì)基本條件、富集規(guī)律與勘探現(xiàn)狀,預(yù)測了該盆地各層系下一步的天然氣勘探和研究方向。
[Abstract]:The Sichuan Basin is the first area in New China to develop natural gas exploration and comprehensive utilization. After more than half a century of oil and gas exploration, In order to predict the direction and target of the next natural gas exploration in the basin, the sedimentary characteristics of marine and continental strata in the basin are systematically summarized. The different forms of polycyclic tectonic movement and its control on sedimentation, diagenesis and accumulation are analyzed. The results show that the basin has undergone a transition from marine to continental facies since the Sinian. The multi-rhythmic deposition of marine facies mainly consists of two types of assemblages, which are characterized by multi-layer oil and gas accumulation in the longitudinal direction, and the polycyclic tectonic movement is characterized by various forms of tectonics, which are related to the deposition of the oil and gas reservoirs. The diagenesis and reservoir formation have obvious controlling effect. The characteristics of oil and gas accumulation and the law of gas reservoir enrichment are further analyzed. It is concluded that the basin is characterized by coexistence of conventional and unconventional reservoirs, multilayer hydrocarbon supply, multiple reservoir types, and multiple trap types. The accumulation of natural gas is related to the strength of hydrocarbon source, large paleouplift, favorable sedimentary facies zone, sedimentation-structure discontinuity surface, structural fracture development zone and so on. Finally, the basic conditions of oil and gas geology are combined. The law of enrichment and the present situation of exploration are used to predict the future exploration and research direction of natural gas in each layer of the basin.
【作者單位】： 中國石油西南油氣田公司勘探開發(fā)研究院;
【基金】：國家大型油氣田及煤層氣開發(fā)重大專項“四川盆地及鄰區(qū)下古生界—前寒武系成藏條件研究與區(qū)帶目標(biāo)評價”(編號:2016ZX05004-005)
【分類號】：P618.13

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本文編號：1627982