摘要
Archie公式的使用是有条件的,其参数选取的准确与否直接影响到饱和度的计算。Archie参数a、m受诸多因素影响,故在使用时不应为一定值,而应随储层性质的变化而变化。研究利用某油田低孔低渗岩电资料,修正了Archie公式,建立了地层因素和孔隙度在双对数坐标下的二次函数关系,推导出了m值的计算公式。通过对比分析,发现修正后的计算结果与岩电实验结果符合程度更高,说明修正后的Archie公式在低孔低渗储层评价中具有一定的适应性。
Archie formula was used under some special conditions and the accuracy of its parameters directly affected the calculation of saturation. The parameters a and m in the formula are affected by many factors, so they were not fixed values in application, but changed with the reservoir properties. The petrophysical data of an oilfield with low porosity and low permeability were used to correct the Archie formula, establish the quadratic function relationship between F and in log-log coordinate and derive the formula for computing m. After comparison, it is found out that the results calculated by the modified model are more consistent with petrophysical data, thus the corrected Archie formula shows its adaptability in the evaluation of low porosity and low permeability reservoirs.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2009年第3期76-78,121,共4页
Journal of Oil and Gas Technology
基金
中国石油天然气集团公司应用基础研究项目(06A30102)
关键词
Archie公式
低孔低渗
胶结指数
孔隙度
Archie formula
low porosity and low permeability
cementation exponent
porosity
