油气工业在勘探及开采阶段,必须采取岩心并对岩心进行分析。大直径(4英寸)岩心为工程师和地质学家从宏观和微观的角度测量贮层岩石的物理性质直接提供样品。取得的资料为工程师了解贮层和预测贮层特性提供依据。如果保存得当,在若干年之后,岩心还有助于对贮层进行研究。在微薄贮层中,由于电缆测井分辨率固有的局限性,实验室岩心分析是十分重要的。在这种情况下,人们不能从电缆测井数据中计算诸如饱和度、孔隙率及油层有效厚度等岩石的物理性质,而必须在实验室从岩心中测得。以往,用钻进致密固结地层的方法钻进这类贮 Oil and gas industry in the exploration and exploitation phase, we must take the core and core analysis. Large-diameter (4-inch) cores provide engineers and geoscientists a direct sample of physical properties of reservoir rocks measured from a macroscopic and microscopic point of view. The data obtained provide the basis for engineers to understand the characteristics of reservoirs and predict reservoirs. After a few years of storage, cores are also helpful in studying reservoirs if properly preserved. In meager reservoirs, laboratory core analysis is important due to the inherent limitations of cable logging resolution. In this case, one can not calculate the physical properties of rocks such as saturation, porosity and effective reservoir thickness from cable log data and must be measured in the laboratory from the core. In the past, this type of reservoir was drilled by drilling into a densely consolidated formation