Fig. 15From: The rheological and filtration properties of black seed (Nigella Sativa L.) ester as a base fluid in drilling fluidFilter cake photographs of HTHP static filtration. Note: A BSO @ 70:30 OWR. B BSO @ 75:25 OWR. C BSO @ 80:20 OWR. D Diesel @ 75:25Back to article page