本文關鍵詞： 超壓 斷層 水頭 起始位置 垂向運移高度　出處：《地質(zhì)學報》2017年07期 　論文類型：期刊論文

【摘要】：在超壓盆地中,當斷層活動斷開超壓烴源巖時,油氣會沿斷層面發(fā)生涌流式垂向運移,這一瞬態(tài)涌流過程為油氣大規(guī)模運聚成藏提供了重要的油氣來源。然而,對于油氣沿斷層垂向運移距離問題的研究,停留在定性分析階段,較少考慮到斷層開啟時造成的泄壓作用,也很少區(qū)分地層水和油氣運移距離的差異。本文認為,油氣順斷層向上運移的距離主要由源巖超壓帶內(nèi)超壓幅度決定,油氣垂向運移理論高度可由超壓幅度折算,因而超壓幅度越大,油氣垂向運移距離越遠,油氣上涌頂界面埋深越淺。油氣初次上涌的起始位置不是地表面,而是有效烴源巖頂面。另外,由于油氣的大量上涌,超壓帶快速泄壓,大部分油氣上涌實際距離不能達到理論上涌的最大距離。同時,考慮到沿斷層運移時受到阻力作用,油氣實際上垂向運移高度遠遠小于理論運移高度。
[Abstract]:In the overpressure basin, when the fault disconnects the overpressure source rock, the oil and gas flow along the fault plane will occur an inrush vertical migration, which provides an important source of oil and gas for the large-scale migration and accumulation of oil and gas reservoir. The study on the vertical migration distance of oil and gas along the fault stays at the stage of qualitative analysis, and seldom considers the pressure relief caused by the fault opening, and seldom distinguishes the difference between the formation water and the migration distance of oil and gas. The distance of upward migration of oil and gas along the fault is mainly determined by the amplitude of overpressure in the overpressure zone of source rock. The theoretical height of vertical migration of oil and gas can be converted from the amplitude of overpressure, so the larger the amplitude of overpressure, the longer the distance of vertical migration of oil and gas. The deeper the interface of oil and gas upwelling is, the shallower it is. The starting position of the initial upwelling of oil and gas is not the surface of the ground, but the top surface of the effective source rock. In addition, because of the large upwelling of oil and gas, the overpressure zone releases the pressure rapidly. Most of the actual distances of oil and gas upwelling can not reach the theoretical maximum. Meanwhile, considering the resistance to migration along the fault, the vertical migration height of oil and gas is much lower than the theoretical migration height.
【作者單位】： 中國石油大學油氣資源與探測國家重點實驗室;中國石油大學地球科學學院;中國石油冀東油田公司;中國科學院地質(zhì)與地球物理研究所;
【基金】：國家油氣專項(編號2011ZX05001-001-04)資助成果
【分類號】：P618.13

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本文編號：1551084