莱阳凹陷作为胶莱盆地的次级构造单元,属于典型的中生代残留盆地,由于新生代以来强烈的构造运动,盆地现构造形态异于原型盆地结构形态,可能经历了局部原生油藏的破坏和次生油藏的形成,仍具有较大的勘探价值。目前油气勘探程度较低,凹陷内油气显示频繁,在野外地质调查、参数井钻探基础上,对其油气成藏条件进行分析,认识到研究区具备形成中小型油气田的地质条件。该区油气勘探重点在于恢复盆地原型,明确油气藏形成的有利区带。在野外地质调查基础上,利用沃尔索相律法恢复盆地边界,用镜质体反射率法恢复地层剥蚀量,对油气成藏条件进行剖析。盆地的东部边界在朱吴、店集一带,野外地质研究证实该带发育边缘相的冲积扇沉积,盆地的西北部莱阳组各段与胶北隆起呈超覆沉积,而盆地的沉积中心位于姜疃、万第一带,山前店以及莱阳西大部分地区则发育半深湖到浅湖相沉积。山前店背斜带古油藏形成条件优越,其翼部保存条件较好,油气勘探潜力较大。 As a secondary tectonic unit in the Jiaolai Basin, Laiyang sag belongs to the typical Mesozoic remnant basin. Due to the strong tectonic movement since the Cenozoic, the present tectonic morphology of the basin is different from that of the prototype basin and may have experienced the destruction of the local primary reservoirs and the secondary The formation of raw oil reservoirs still has great exploration value. At present, the degree of oil and gas exploration is relatively low, and the oil and gas in the depression show up frequently. Based on the field geological survey and parameter well drilling, the hydrocarbon accumulation conditions are analyzed, and the geological conditions for forming small and medium-sized oil and gas fields are recognized in the study area. The focus of oil and gas exploration in this area is to restore the prototype of the basin and clarify the favorable zones for the formation of oil and gas reservoirs. Based on the field geological survey, the basin boundary was restored by the Worsood method, and the denudation of the formation was recovered by the vitrinite reflectance method. The hydrocarbon accumulation conditions were analyzed. The eastern boundary of the basin lies in the Zhuwu and Jiadian areas. Field geological studies confirm that the belt developed alluvial fan facies with marginal facies. Each segment of the Laiyang Formation in the northwestern part of the basin overlaps with the Jiaobei uplift, whereas the sedimentary center of the basin is located in the Jiang疃, Wan first belt, mountain shops and most parts of Laiyang West is the development of semi-deep lake to shallow lacustrine deposition. The ancient reservoirs in the anticline of the Shanqiandian have favorable conditions for the formation of the paleo-oil reservoirs, the preservation conditions of the wings are good, and the potential for oil and gas exploration is large.