If fracture porosity is 2%, it was derived from the simulation result that using high-resistivity mud (500 Q -m) can identify shale fractured formation which includes 750 fractures or more.
Xu M. -z., Luo L. -s., Li Y., Wu Y. -q., Jiang X. -h., Xu J. -s. Intravascular ultrasound versus coronary angiography in coronary artery stent implantation.