姬塬油田延长组长9储层孔喉结构分形特征  

Fractal characteristics of the pore-throat structure of Chang9 reservoirs in Yanchang Formation of Jiyuan Oilfield

作　　者：丁黎[1] 刘振旺 张瑛[1] 王楠[1] 王继伟[1] DING Li;LIU Zhen Wang;ZHANG Ying;WANG Nan;WANG JiWei(Exploration and Development Research Institute of PetroChina Changqing Oilfield Company;Beijing Chengkai Delin Technology Co.Ltd.)

机构地区：[1]中国石油长庆油田分公司勘探开发研究院 [2]北京诚开德邻科技有限公司

出　　处：《低渗透油气田》2018年第2期27-31,共5页

摘　　要：砂岩储层的孔喉结构在一定尺度范围内具有分形特征,根据分形几何理论与分形维数定义,利用压汞资料,采用MIFA法计算姬塬油田黄219井区长9储层孔喉结构的分形维数。结果表明,进汞毛细管压力曲线在非线性流阶段,孔喉结构在三维区间内具有分形特征。分形维数与孔喉分布、孔喉连通性特征参数的相关性良好,可以综合反映孔喉分布及连通的复杂程度。分形维数与物性之间的相关性表明,具有相同或相似成因的孔喉结构,其分形维数集中在一定范围内,此分形维数可以作为储层分类评价的一个重要参数。The pore-throat structure of sandstone reservoirs has fractal features within a certain scale.According to the fractal geometry theory and fractal dimension definition,the fractal dimension of the pore-throat structure of the Chang9 reservoirs in the well Huang-219 area of the Jiyuan Oilfield was calculated by MIFA method using mercury intrusion data.The results show that,in the nonlinear flow stage,the pore-throat structure derived from the capillary pressure curves of the mercury intrusion has fractal characteristics in the three-dimensional interval.The fractal dimension has a good correlation with the pore-throat distribution and pore-throat connectivity parameters,which can comprehensively reflect the pore-throat distribution and complexity of the connectivity.The correlation between fractal dimension and physical properties indicates that the fractal dimension of the pore-throat structure with the same or similar causes of formation is concentrated in a certain range.This fractal dimension can be used as an important parameter for reservoir classification evaluation.

关 键 词：孔喉结构 分形 非均质性 启动压力 非线性流 姬塬油田 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]