1. Thomas -Stieber Model Normalized gamma ray and density porosity values are provided for six sand zones in a well containing a sand -shale lamination sequence . The sand layers may or may not contain dispersed clays * Net / brass Point Normalized GR Density Porosity (% ) Sand & Net / Gross R 34.0 34 10 90 of zone S 10 35 25- 35 40 that is sand 20.0 23 68 65 30 0 - 35 us shaly 35 5.2 95 W 22 laminae 27.3 31 82 Do the following $ DC makes a. Plot the normalized gamma ray and density porosity values for each sand zone on the Thomas - Stieber plot below b. Determine the sand porosity in each zone c. Determine the net /gross percentage for each sand zone d. Which zones must contain gas or structural clays ? 2. Waxman -Smits Bound Water Calculation a. Calculate the conductivity of each brine saturated sand , use m * = n* = 2 the conductivity of the interbedded shales = 1 ohmmeter , Rw = .1 ohmmeter (- 150,000 ppm ) at the formation temperature of 98 F (implies B=Bmax ), pm = 2.2 and from core analysis you have determined Qv = .35 - osand. Show your work b. Calculate the bound water saturation for the U sand on the Pc curve below c. For each sand correct the capillary pressure curve given above for the effects of bound water d. Which of these sands would be permeable enough to complete ? 0.084 Equations: S , we, ; W 0.22 + 2, CEC Pma 1 - 0 C, Cw " (1 try B Q.) , Bmax =3.83 anrection Ct = C+ (1 - Net )( shale C ) laminated day