济阳坳陷陡坡带油气富集特征

依据构造样式和沉积特征将济阳坳陷陡坡带分为板式、铲式、断阶式、坡坪式4种类型。断阶式和坡坪式陡坡带砂砾岩扇体类型多,成藏条件优越,各类油气藏发育完全,在纵向上组成较完整的油气藏序列。板式和铲式陡坡带砂砾岩扇体主要为近岸水下扇,其次为扇三角洲,油气藏类型单一,在纵向上油气藏序列发育也不完整。此外,板式陡坡带由于断裂不发育,沉积相带窄,油气相对贫瘠。油气在断阶式中最为富集,其次为坡坪式和板式,铲式相对贫乏。

Oil and Gas Accumulation Characteristics in Actic Region of Jiyang Depression

Based on tectonic style and sedimentary characteristics,there are four types of structures in actic region of Jiyang Depression: apron style,spade style,terrace style and slope-flat style.In terrace type and slope-flat type structures,there are many glutenite fan types,advantageous accumulating condition,various reservoir types and entire reservoir series in vertical.Glutenite fan body of apron and spade type structures was mainly inshore subsea apron,and then fan delta,which have single reservoir type and imperfect reservoir array in vertical.Moreover,oil and gas of apron actic region is poor because of undeveloped faults and narrow sedimentary facies belt.Oil accumulated more in terrace style than flat style and slope-flat style.