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Keywords: pressure drop
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Proceedings Papers

Paper presented at the SPE European Formation Damage Conference and Exhibition, June 3–5, 2015
Paper Number: SPE-174188-MS
... in an additional pressure drop and a positive skin. Similar to the case of the flow convergence skin described above, if the geometry of the reservoir and the geometry of the completion are understood and can be explicitly modelled then the requirement for a partial penetration skin factor is not...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference and Exhibition, June 3–5, 2015
Paper Number: SPE-174204-MS
... proppant Upstream Oil & Gas guar pressure drop formation damage hydraulic fracturing concentration v1-based fluid fracturing fluid Berea core viscoelastic surfactant production direction guar fluid initial permeability filter cake KCl viscosity permeability percentage cacl 2...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference and Exhibition, June 3–5, 2015
Paper Number: SPE-174279-MS
.... drilling fluid chemistry flow in porous media Well Intervention Upstream Oil & Gas enhanced recovery Completion Installation and Operations acidizing drilling fluid selection and formulation drilling fluid property production enhancement emulsion sample Brine pressure drop polymer cement...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference & Exhibition, June 5–7, 2013
Paper Number: SPE-165157-MS
... solubility is due to the fact that when the scale is dissolved in water, there is a decrease in the total volume of the system. (1) C a S O 4 + H 2 O « C a + 2 + S O 4 - 2 + H 2 O Pressure drop can be a major cause of calcium sulfate scale in producing wells and...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference & Exhibition, June 5–7, 2013
Paper Number: SPE-165084-MS
... Bandera Quartz 86 57 Dolomite 1 16 Calcite 2 — Feldspar 3 12 Kaolinite 5 3 Illite 1 10 Chlorite 2 1 Fig. 1 Pressure drop across the Berea core treated by 2.5 PV of full strength sandstone acid without preflush at 2 cm 3 /min and 250°F...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference & Exhibition, June 5–7, 2013
Paper Number: SPE-165147-MS
... Calcite - 2 Illite 12 1 Kaolinite 4 5 Chlorite 2 2 4 PV of Acid C Permeability enhancement, % -33 86 Table 3 Summary of the core test results for Acids A, B, C, and D. No. Main Treatment Maximum Observed Pressure Drop, psi Injected Volume, PV Permeability...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference & Exhibition, June 5–7, 2013
Paper Number: SPE-165123-MS
... wells Fig. 3 Location of field A Fig. 4 Kaolinite content in formation Fig. 5 Stratigrafic column field A. Fig. 6 Completion diagram Fig. 1 Pressure drops through gravel pack Fig. 2 Methodology flow chart Fig. 10 Nodal analysis...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference & Exhibition, June 5–7, 2013
Paper Number: SPE-165136-MS
... retention is not required. In all the samples tested the data was reviewed for increasing pressure drops indicating plugging. Visual inspection of the mesh was also carried out to determine if mechanical damage of the weave or plugging by the compacted material was present. The following photographs...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference & Exhibition, June 5–7, 2013
Paper Number: SPE-165194-MS
... depicting the deposition of hematite particles in the porous medium at different distances (a) 1.9 cm, (b) 3.2 cm, (c) 5 cm from the injection end of the core for experiment SF-3. Fig. 3 Schematic of the experimental set-up depicting the flow directions. Fig. 4 Total pressure drop and...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference & Exhibition, June 5–7, 2013
Paper Number: SPE-165203-MS
... * - * At breakthrough, the pressure drop decreased to values around 10 psi. The permeability enhancement was greater than 500 fold in all cases. Table 3 Data for coreflood experiments with Fe 3+ . Run # Acid concentration, wt% T, °F Iron Amount, ppm Core Length, in Core Porosity...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference & Exhibition, June 5–7, 2013
Paper Number: SPE-165195-MS
... polymer concentration of 500 ppm, pH of 5.8 ± 0.1 and a flow rate of 1± 0.02 cc/min. The dotted lines are only for better viewing and do not indicate modeled results. Fig. 10 Pressure drop across the core with number of pore volumes injected for a polymer concentration of 250 ppm and solvent...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference & Exhibition, June 5–7, 2013
Paper Number: SPE-165190-MS
... concentration vs. PV injected Figure 4 Single-Phase core-flood at residual oil saturation using sample#3- a) Permeability vs. PV injected, bAverage concentration of particles in effluent vs. Brine salinityc) Number of particles in effluent vs. PVI Figure 5 Pressure drop vs. PV injected for...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference & Exhibition, June 5–7, 2013
Paper Number: SPE-165193-MS
..., 2011). Total pressure drop over the external filter cake and core is given by (A-2) Δ P t o t a l = Δ P c a + Δ P c o where partial pressures drops ∆P ca and ∆P co correspond respectively to single phase flow in the external filter cake and either sigle...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference, June 7–10, 2011
Paper Number: SPE-143164-MS
... required to remove cohesion forces Figure 5 Plugging mechanisms Figure 7 Pressure drops recorded for one the fields tested Figure 8 Eroded channels through the compacted sand Figure 9 Pieces of sandstone material before (left) and after (right) a P = 500 psi has been...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference, June 7–10, 2011
Paper Number: SPE-143166-MS
... Figure 11 History match of bottomhole pressure based on increasing effective fracture length Figure 12 History match of buildup with 2 different model realizations Figure 13 Pressure distribution in the fracture showing convergent flow pressure drop Figure 14 Pressure...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference, June 7–10, 2011
Paper Number: SPE-143301-MS
... effluent analysis for Berea sandstone core treated by 0.6M GLDA at 5 cm 3 /inin and 250°F. GLDA chelated more calcium than iron. Fig. 1 Pressure drop across the core during the coreflood experiment for 0.6M GLDA, 0.6M HEDTA, and 0.6M EDTA at 300°F and 5 cm 3 /min using Berea sandstone cores...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference, June 7–10, 2011
Paper Number: SPE-143449-MS
.... Fig 5 The pH value and density of the effluent when the core was treated with 20 wt% HCl at the injection rate of 2ml/min. Fig. 2 Normalized Pressure Drop Across the Core as a function of Cumulative Injected Volume when Treated with 20 wt% HCl. Fig. 3 Normalized Pressure Drop...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference, June 7–10, 2011
Paper Number: SPE-143643-MS
... 15 26.3 B3 Gelled Acid 2.5 9 18.6 B4 Gelled Acid 10 14 21.9 B5 In-Situ Gelled Acid 2.5 11 16.7 B6 In-Situ Gelled Acid 10 13 17.2 Fig. 7 Pressure drop across the core during the injection of in-situ gelled acid at injection rate of 2.5 cm 3 /min, 200°F...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference, June 7–10, 2011
Paper Number: SPE-143855-MS
... 1,108 8 9.4 163.7 SW - Seawater DW - Deionized water Fig. 14 Pressure drop at 5 cm 3 /min. (a) for acid prepared in deionized water; (b) for acid prepared in seawater. Fig. 9 Pressure drop at 1 cm 3 /min. (a) for acid prepared in deionized water; (b) for acid prepared in...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference, June 7–10, 2011
Paper Number: SPE-143967-MS
... in the laboratory has been simulated by rate control or pressure control. We demonstrate that neither of these techniques adequately capture the transient nature of pressure drop and fluid flow in the near wellbore area, leading to artifacts that produce unrepresentative and questionable return...

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