通过对惠民凹陷商河地区沙一段碳酸盐岩成岩作用的研究 ,结合沉积特征 ,建立了其成岩作用和油气成藏模式 .认识碳酸盐岩隐蔽油气藏较发育规律 .由于快速进积的碳酸盐浅滩表面水体在大气水的影响下逐渐淡化 ,碳酸盐物质沉积不久即发生强烈溶解 .准同生期和浅埋藏阶段 ,在孔隙中形成薄层栉壳状白云石和少量蛋白石、绿泥石胶结物 .沙一段沉积末期 ,沿断裂运移上来的深部油气在沙一段碳酸盐岩孔隙中储集并形成岩性油气藏 ,未被油气充填的孔隙则被从油层水中沉淀的粗大晶粒状方解石所完全充填 .沙一段碳酸盐岩中的隐蔽油气藏应从沙一末期至东营组沉积初期的构造高点来寻求突破 ,而不是现今的构造高点 By studying the diagenesis of the first member of carbonate rocks in the Shanghe area of ​​Huimin Depression and combining with the sedimentary characteristics, the diagenesis and hydrocarbon accumulation models were established, and the comparatively well-developed laws of subtle carbonate reservoirs were recognized. Of Carbonate shoal surface water gradually desalinated under the influence of atmospheric water, and the carbonate material dissolved intensively in the short time.Planktonic dolomite and a small amount of opal were formed in the pores during the quasi-syneary and shallow burial stages, Chlorite cement.During the sedimentary period of the first member of the Shahejie Formation, the deep oil and gas transported along the faults accumulated and formed lithologic reservoirs in the carbonate pores of the first member of the Shahejie Formation, while the pores that were not filled by the oil and gas were precipitated from the reservoir water The coarse grained calcite is completely filled in. The subtle reservoirs in the carbonate sandstone of the First Member of the Shahejie Formation should seek breakthrough from the structural high point of the sedimentation from the end of the Shalin to the initial sedimentation of the Dongying Formation, rather than the current structural high point