【摘要】 碳酸盐岩是一种重要的含油气层系 ,由于其特有的复杂物性 ,使地震的纵向和横向分辨率降低 ,其储层预测极其困难。塔里木盆地某地区奥陶系碳酸盐岩风化壳裂缝型储层 ,由于缝洞、孔洞储集体非均质性极强 ,其有效储层分布非常复杂 ,物性变化和优质储层的分布规律不清 ,给储层横向预测造成很大困难。针对这一情况 ,我们建立了碳酸盐岩缝洞型储层研究技术体系 ,即相干体计算技术、地震—测井联合反演技术和模式识别技术 ,再加上地震特殊处理、精细构造解释技术以及三维可视化技术 ,确定了风化壳顶面形态 ,指出研究区内有利区带分布范围及油气藏呈“鸡窝状”分布规律 ,确定出岩溶斜坡是裂缝发育最有利储层带 ,确定了储层评价标准 ,优选了 3口井的设计井位。本文对于裂缝性油气藏的研究尚处于试验性阶段 ,但目前已经取得了初步效果。更多还原

【Abstract】 Carbonatite is a kind of important reservoir.The vertical and lateral resolution of seismic data will decrease and reservoir prediction will b e very difficult for its specific complicated physical properties. In the fractured reservoir of Ordovician carbonate weathering crust in some area in Tarim Basin,the fractured reservoir is strongly inhomogeneous,the distributi on of effective reservoir is very couplicated,and the rules of physical properti es change and favourable reservoir distribution are difficult to identify.All o f these impose big problem on lateral reservoir prediction. For this reason,we developed a series of techniques ,including coherence calc ulation,joint inversion of seismic data and well log,pattern recognition,seismic spec ial processing,detail structure interpretation and 3D visualization.Using these te chniques,the terrain of the top surface of weathering crust and the distri bution range of favourable zone are identified,and the rule of reservoir distrib u tion is point out.In addition,the criteria for reservoir eva luation are determined.The study leads to the conclusion that karst slope is the most favourable location for fractured reservoir.Consequently,3 wells are located. The study of fractured reservoir in this paper is still in experiment,but we hav e obtained elementary results.更多还原