Abstract: Exploration researches on lithologic and stratigraphic reservoirs in Erlian Basin and Jizhong Depression in recent years reveal that the different trap-forming mechanism and variance of reservoir-forming control factors resulted in unique distribution of lithologic and stratigraphic reservoirs compared to the structural reservoirs. Lithologic and stratigraphic reservoirs were mainly distributed along the "flood surface, unconformity surface and fault surface". Those reservoirs could be distributed in the low or high potential areas and developed in the low system tract (LST) or the high system tract (HST). The distribution of lithologic reservoirs was mainly controlled by depositional system, and the distribution of stratigraphic reservoirs was mainly controlled by truncation zones and overlap zones. The enrichment degrees of them were mainly controlled by sedimentary facies and reservoir facies belts. The exploration of lithologic and stratigraphic reservoirs should be taken into attention. Exploration units must be reclassified by taking sedimentary system, stratigraphic overlap and denudation as the main control factors. More attention should be paid to the study on reservoirs controlled by the "flood surface, unconformity surface and fault surface" as well as by the sedimentary facies and reservoir facies. The exploration domains should be extended from ring sag to troughs, from positive structural areas to negative structural areas, from structural highs to structural flanks, and from structural zones to lithofacies zones, overlap zones and denudation zones.

Key words: lithologic reservoirs, stratigraphic reservoirs, distribution feature, flood surface, unconformity surface, Jizhong Depression, Erlian Basin

摘要： 近几年对二连盆地、冀中坳陷岩性及地层油藏的勘探研究结果表明,与构造油藏相比,由于圈闭形成机制的不同和成藏控制因素的差异,岩性、地层油藏主要沿"湖泛面、不整合面、断面"分布;既可分布于低势区,也可分布于高势区;既可发育于低位域,也可发育于高位域.岩性油藏的分布主要受控于沉积体系,地层油藏的分布主要受控于削截带和超覆带,其富集程度主要受沉积储集相带的控制.因此,在对岩性及地层油藏的勘探中,一定要以沉积体系、地层超覆、地层剥蚀为主控因素重新划分勘探单元;注重对"湖泛面、不整合面、断面"控藏和沉积相、储集相的研究;要拓展勘探领域,即由环洼向洼槽,由正向构造区向负向构造区,由构造带的高部位向构造带的翼部,由构造带向岩相带、超覆带、剥蚀带延伸.

关键词: 岩性油藏, 地层油藏, 分布特征, 湖泛面, 不整合面, 冀中坳陷, 二连盆地