AGER, 2017, 1(2) : 93-99 基于膨胀腐蚀数学算子与LBM的渗透率与孔隙关系研究

宁坤

基于膨胀腐蚀数学算子与LBM的渗透率与孔隙关系研究。查文舒、闫术、李道伦、卢德唐等AGER论文。

内容摘要：为研究渗透率的变化规律，基于真实岩心数据，利用膨胀与腐蚀数学算子得到多组孔隙空间逐渐变化的数字岩心，用以模拟酸化与结垢等都流动的影响。最后使用LBM方法计算数字岩心的绝对渗透率，进而研究渗透率与孔隙空间的对应关系。

Advances in Geo-Energy Research. 2017, 1(2) : 93-99网址：http://www.astp-agr.com/index.php/Index/Index/detail?id=21

A study of correlation between permeability and pore space based on dilation operation

Wenshu Zha, Shu Yan, Daolun Li, Detang Lu

(Published: 2017-09-25)

Corresponding Author and Email: Daolun Li, ldaol@hfut.edu.cn

---

Citation: Zha, W., Yan, S., Li, D., et al. A study of correlation between permeability and pore space based on dilation operation. Adv. Geo-energ. Res. 2017, 1(2): 93-99, doi: 10.26804/ager.2017.02.04.

---

Article Type: Original article

---

Abstract:

CO2 and fracturing liquid injection into tight and shale gas reservoirs induces reactivity between minerals and injected materials, which results in porosity change and thus permeability change. In this paper, the dilation operation is used to simulate the change of the porosity and the corresponding change of permeability based on Lattice-Boltzmann is studied. Firstly we obtain digital images of a real core from CT experiment. Secondly the pore space of digital cores is expanded by dilation operation which is one of basic mathematical morphologies. Thirdly, the distribution of pore bodies and pore throats is obtained from the pore network modeling extracted by maximal ball method. Finally, the correlation between network modeling parameters and permeabilities is analyzed. The result is that the throat change leads to exponential change of permeability and that the big throats significantly influence permeability.

---

Keywords: Permeability, pore space change, dilation operation, pore network model, microscopic percolation.