饶阳凹陷蠡县斜坡中部沙一下亚段碳酸盐岩沉积储层及油藏特征

饶阳凹陷蠡县斜坡中部是沙一下亚段碳酸盐岩的有利发育区，以生物灰岩、鲕状灰岩和白云质灰岩为主。目前多口井在该层系获工业油流或见良好油气显示，展示了沙一下亚段碳酸盐岩的勘探潜力。近两年通过井震结合、岩心薄片观察、测井解释、单井相及多井相分析等多种技术手段，对沙一下亚段碳酸盐岩沉积储层及油藏特征进行了深入研究，明确了沙一下亚段碳酸盐岩的平面展布规律及有利含油相带。沙一下亚段碳酸盐岩储层物性具有中孔、中渗特征，油藏类型以构造-岩性和岩性地层为主，成藏条件较为复杂，主要受沉积微相和储层物性控制。高阳地区位于滨浅湖区，沙一下亚段碳酸盐岩分布最厚，主要发育生物灰岩和鲡状灰岩；西柳地区位于半深湖区，主要发育白云质灰岩，储层物性最好。优选这两个区带，为蠡县斜坡中段碳酸盐岩重点勘探区带。

Carbonate Sedimentary Reservoir Features of Lower Submember of First Member of Shahejie Formation in Central Lixian Slope,Raoyang Sag

Central Lixian slope of Raoyang sag is a favorable area for carbonate development, which is dominated by biolithite limestone, oolitic limestone and dolomitic limestone. Now industrial oil run has been got or good hydrocarbon indication has been seen in many wells of the series of strata, which presents the exploration potential of carbonate in lower submember of the first member of Shahejie Formation. In the past two years, such techniques as the integration of well logging and seismic, core slice observation, log interpretation, and core facies analysis have been used for in-depth research on carbonate sedimentary reservoir features in lower submember of the first member of Shahejie Formation, clarifying the planar distribution and favorable oil-bearing facies belt of the carbonate here. Carbonate reservoir here features in middle porosity and middle permeability, structural-lithologic and lithologic strata are dominant reservoir types, and reservoir-forming conditions are complicated and controlled by sedimentary microfaeies and reservoir physical property. Gaoyang area is located in shallow lake, carbonate in lower submember of the first member of Shahejie Formation is the thickest, and biolithite limestone and oolitic limestone mainly developed. Xiliu area is located in fairly deep lake, where dolomitic limestone mainly developed and reservoir physical property is the best. The two areas are focal zones for carbonate exploration in central section of Lixian slope.