摘要
压汞数据估算的孔喉大小能评价圈闭的封闭能力和解释地层烃类聚集的有利部位 ,是储层研究中的一个重要参数。但是 ,压汞测试昂贵 ,因而一个地区这种资料少 ,而常规岩心分析资料如孔隙度和渗透率数据往往比压汞测试资料丰富得多。是否可以根据岩样的孔隙度和渗透率的大小反演岩样的孔喉体积分布 ,或者反演毛管压力曲线 ?利用分形几何学的原理和方法 ,实现了利用常规岩心分析资料如孔隙度和渗透率等反演毛管压力曲线 ,建立孔喉体积分布预测模型 ,为非取心井段的孔隙结构研究开辟了新途径。通过实际资料验证 ,该方法预测结果精度较高。
The predicted pore throat volume by the capillary pressure data is a key parameter and can be used to evaluate the shutoff of trap and the favorable area of hydrocarbon accumulation. But it is not easy to acquire the capillary pressure data, and it is easy to acquire the porosity and permeability data by common core analysis. So if we can inverse the distribution of pore throat or the capillary pressure curve by the pore and permeability data of the core? Based on the fractal geometry, the capillary pressure curve of inversion is acquired by the porosity and permeability data, and the model for estimating the distribution of pore throat is set up. It opens up a new way for the study of pore structure in non cored formation. The practical data verifies the validity of this method.
出处
《西南石油学院学报》
CSCD
2002年第3期5-7,共3页
Journal of Southwest Petroleum Institute
基金
"油气藏地质及开发工程"国家重点实验室开放基金项目 (PLN0 13 4)
关键词
孔隙度
渗透率
孔喉分布
毛管压力曲线
分形几何学
porosity
permeability
distribution of pore throat
capillary pressure curve
fractal geometry
