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东营凹陷沙三中亚段层序由湖进体系域和湖退体系域组成,构造沉降为湖进体系域主控因素,可容空间在盆地范围统一增加,欠补偿沉积形成暗色泥岩烃源岩;沉积物供给为湖退体系域主控因素,在盆地缓坡中部和陡坡中部形成可容空间转换带,该带外侧可容空间减小,内侧可容空间增加。平面上,油气藏的形成和分布与可容空间的分布具明显关系,可容空间转换带是油气成藏最有利的地区,特别是岩性油气藏集中分布的地区,可容空间减小带主要为构造-断块油气藏集中分布区,而可容空间增加带主要分布着滑塌浊积砂体形成的油气藏。
The sequence of the middle member of Es3 in the Dongying Sag is composed of lacustrine system tract and lake retarded system tract. The tectonic subsidence is the main controlling factor of the lake system tract. The accommodation space increases uniformly in the basin and undercompensates the sedimentation to form the dark mudstone source rock Sediment supply is the main controlling factor in the retreat system of the lake basin. In the middle part of the gentle slope and the middle part of the steep slope, a space-for-space transformation zone is formed. The outer space of the belt can be reduced and the space of the inner space can be increased. In the plane, the formation and distribution of oil and gas reservoirs are obviously related to the distribution of allowable space. The accommodation space is the most favorable area for oil and gas accumulation, especially for the areas with concentrated distribution of lithologic reservoirs. Mainly for the tectono-faulted oil and gas reservoirs concentrated distribution area, and the increase of space to accommodate the main distribution of slump turbidite sandstone reservoirs.