沥青质砂岩储层的岩电参数研究

从储层评价角度来看，沥青是占据孔隙空间的一种化学沉淀物。沥青质的存在，会严重影响储层的孔渗特性和地层岩电参数的确定，进而导致测井解释结论出现误差。通过岩电试验，探讨了塔河油田西部志留系因含有沥青质而对物性、电性影响的问题，并按储层分类，给出了沥青质砂岩和非沥青质砂岩的岩电参数，提出了沥青质砂岩的物性校正公式。这些结果已用于实际测井资料的解释评价，为正确识别油气层提供了保障。

Studies on Rock-electrical Parameters in Asphaltic Sand Reservoirs

From the aspect of reservoir evaluation, asphalt was a kind of chemical deposition which occupied some the pore spaces of the formation. The existence of asphalt had a bad effect on the porosity-permeability property of reservoirs and the determination of rock-electro parameters of the formation. All of them would result in wrong conclusion in logging evaluation. The influence of asphaltine to physical properties and rock electrical resistivity of sand samples in Silurian reservoir in Tahe Oilfield are discussed by using rock-electrical experiment results, and deduced rock-electrical parameters according to permeability reservoir sorting and the relevant correction formula of physical properties., it provides the basis for accurate evaluation of oil and gas formation by well-logging.