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Controlling factors and distribution of reservoir development in Dengying Formation of paleo-uplift in central Sichuan Basin
Author(s): 
Pages: 416-426
Year: Issue:  4
Journal: Acta Petrolei Sinica

Keyword:  Sichuan Basinpaleo-uplift of central SichuanDengying Formationpaleo-karstreservoircontrolling factordistribution prediction;
Abstract: 以四川盆地川中古隆起区深层最古老的震旦系碳酸盐岩为研究对象,通过对储层宏观、微观特征观察及储层发育控制因素的深入研究,表明灯影组储层为“丘滩相+岩溶”复合成因类型,储层发育受丘滩相的控制,岩溶叠加改造扩溶或新增孔隙(洞)是现今储集空间的主体.同时提出桐湾期灯影组岩溶为早成岩期层控(受丘滩相约束)型风化壳岩溶,川中古隆起区丘滩相与区域性岩溶作用的大面积叠合是灯影组储层大规模连片发育的关键.受丘滩相发育程度和岩溶改造强度差异的影响,古隆起区不同区带储层发育程度存在差异,高石梯构造—磨溪构造西侧南北向带状区为储层发育“甜点”区.灯影组储层预测的关键在于丘滩体的有效识别和岩溶地貌的精细刻画,寻找与磨溪 高石梯类似的丘滩体和岩溶残丘—岩溶陡坡叠合区.
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