利用毛管压力和测井资料评价H油田碳酸盐岩储层的含油饱和度

Evaluation on oil saturation of carbonate reservoir in H Oilfield using capillary pressure and logging data

Archie方程为利用测井资料计算储层含油饱和度奠定了基础,其中岩电参数的合理性直接影响到储层含油饱和度的计算精度,甚至影响到储层测井评价的结果。由于实验方法、手段的不同以及人为误差,即使同一个实验室对同一层位的岩心进行2次实验,得到的岩电参数也相差较大。因此,利用岩电实验得到的岩电参数进行储层含油饱和度评价时,需要用其他资料检验其合理性。在没有密闭取心条件下,可以用毛管压力资料确定的含油饱和度作为标准对岩电参数进行检验和优化,以获得合理的储层含油饱和度。通过对碳酸盐岩储层的评价,提高了测井解释储层含油饱和度的精度。

Archie equation provide basis for calculating reservoir oil saturation using logging data. Reasonability of its lithoeleetrie parameters directly influence the calculation accuracy of oil saturation, and even the result of reservoir eval- uation. Comparison analysis shows that, different experimental methods and processes and manmade error lead to different lithoeleetric parameters with two experiments for a core from a same horizon in a same laboratory. Thus oil saturation evaluation with lithoeleetrie parameters got from lithoelectrie experiment needs other data to examines its reasonability. In the condition without sealed coring, oil saturation determined by capillary pressure data can be used as a standard to examine and optimize lithoelectrie parameters so as to get reasonable oil saturation of reservoir. Evaluation on carbonate reservoir increases accuracy of oil saturation interpreted by logging data.