Page 220 - Gas Wettability of Reservoir Rock Surfaces with Porous Media

204 Gas Wettability of Reservoir Rock Surfaces with Porous Media

added to the base slurry to measure the rheological properties, API filter loss,
and HPHT filter loss of the drilling fluid, at 80 C with a pressure of 3.5 MP

for 30 minutes. The results are shown in Tables 6.4 and 6.5. At different
concentrations, the film-forming amphiphilic polymer reservoir protecting
agent LCM-8 has almost no influence on the rheological properties of the base

Table 6.4 Comparison of High Temperature and High-Pressure Filtration
Loss of Film-Forming Agents at Different Concentrations (mL)
% 0 1 2 3 4 5 6
FLC2000 90 64 56 44 37 32 25
LCM-8 (this research) 90 48.8 40.2 34.6 28.4 23 21.2
OCL-BST-1 90 81.8 64.6 54.2 38.4 35.4 26.2
CMJ-2 90 88 84 80.4 85 87 /

Table 6.5 Comparison of Rheological Properties and API Filter Loss of Film-Forming Agents
at Different Concentrations

Type Concentration (%) AV (mPa.s) PV (mPa.s) YP/Pa YP/PV API.V f (mL)
21
(Pa.(mPa.s) )
OCL-BST-I 0 10 5 5 1 34
1 10 4.5 5.5 1.22 30
2 17.5 8.5 9 1.06 26.4
3 19.75 9.5 10.75 1.13 23.8
4 22.5 8 14.5 1.81 20.4
5 32 13.5 18.5 1.37 16.8
6 35 18 17 0.94 14.2
BST-D 0 10 5 5 1 34
1 9 4 5 1.25 32.8
2 12.75 7.5 5.25 0.7 30.8
3 16.25 8.5 7.75 0.91 31
4 18.5 9.5 9 0.95 27.6
5 21.5 11.5 10 0.87 26.4
6 24 12 12 1 27
CMJ-2 0 10 5 5 1 34
1 11 6 5 0.83 20.4
2 13.25 7.5 5.75 0.77 17.4
3 12.5 7 5.5 0.78 14.2
4 13 6.5 6.5 1 11.6
5 14 7.5 6.5 0.87 8.6
6 17.5 8.5 9 1.06 8
LCM-8 0 10 5 5 1 34
1 16.5 13.5 3 0.22 12
2 38 27 11 0.41 8
3 42.5 28 14.5 0.52 7.4
4 55 34 21 0.62 6.8
5 70 39 31 0.79 6.4
6 86.5 41 45.5 1.11 5.6