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Journal Articles
SPE J. 2 (03): 216–222.
Paper Number: SPE-79-PA
Published: 01 September 1962
... in exchangeable state. The property of exchange capacity is measured in terms of milliequivalents (meq) per 100 gm of clay. The cation-exchange capacities are taken at pH 7 from titration curves which show the relation between pH and milliequivalents of added NaOH. The following are causes of cation exchange...
Journal Articles
J Pet Technol 3 (10): 15.
Paper Number: SPE-951376-G
Published: 01 October 1951
.... Positive ions are plotted to the left while negative ions are plotted tothe right. The figure immediately beneath each ion gives the scale. Most oilfield waters can be plotted on a scale where 100 milliequivalents of sodium andchloride and 10 milliequivalents of each of the other ions are represented byone...
Comparison of the adsorption isotherm of four phosphonate inhibitors, ortho...
Published: 30 January 2002
Figure 5 Comparison of the adsorption isotherm of four phosphonate inhibitors, orthophosphate, and pyrophosphate. The solid phase concentration is noramlized to milliequivalent of phosphorus per unit surface area (m 2 ) and the solution phase concentration is normalized to milliequivalent per lite... More
Proceedings Papers

Paper presented at the Canadian International Petroleum Conference, June 17–19, 2008
Paper Number: PETSOC-2008-017
... present are Na+ and Ca2+ while the main anions are Cl-, SO42-and HCO3-. Based on the milliequivalents, the equivalent NaCl concentration was estimated to be 2646 mg/l. To be on the conservative side, 5 g/l NaCl brine was used in the flow experiments. Silica fume was selected to be the type of particle...
Journal Articles
J Can Pet Technol 29 (04).
Paper Number: PETSOC-90-04-10
Published: 01 July 1990
... commonly in use in soil science is the sodium adsorption ratio Equation (Available In Full Paper) with aqueous concentrations of ions expressed in millimole per litre (if milliequivalents per litre are used, the mean, rather than the sum of concentrations in the denominator, needs to be used). Impairment...
Journal Articles
SPE J. 18 (06): 435–444.
Paper Number: SPE-6769-PA
Published: 01 December 1978
... concentrations for C1 through C4 (including the stationary phase concentrations) are in milliequivalents per milliliters of pore volume. The foregoing assumptions restrict somewhat the usefulness of the following results when predicting the behavior of real systems. Nevertheless, these results effectively...
Journal Articles
J Pet Technol 30 (06): 959–968.
Paper Number: SPE-6598-PA
Published: 01 June 1978
... when defined as total equivalents of cations per unit volume (as done in this paper). Among the usual components of sandstone petroleum reservoirs, clay minerals are well known for their ion exchange properties. The cation exchange capacities (CEC) vary from about 10 meq (milliequivalents)/ 100 gm...
Journal Articles
J Pet Technol 29 (10): 1336–1338.
Paper Number: SPE-6642-PA
Published: 01 October 1977
... but, as used, do not adequately do scribe the equilibria with the surfactant system. These equations are (1) and (2) where C and C are the concentrations of the indicated cation associated with the clay and equilibrium solution, respectively, both expressed as milliequivalents per milliliter of pore volume...
Comparison of the adsorption isotherm of four phosphonate inhibitors, ortho...
Published: 01 August 2003
Fig. 5 Comparison of the adsorption isotherm of four phosphonate inhibitors, orthophosphate, and pyrophosphate to barite. The solid-phase concentration is normalized to milliequivalent of phosphorus per unit surface area (m 2 ), and the solution-phase concentration of phosphate and pyrophosphate i... More
Proceedings Papers

Paper presented at the CORROSION 2003, March 16–20, 2003
Paper Number: NACE-03492
... Subsurface Corrosion milliequivalent Sodium Hydroxide requirement ammonia Upstream Oil & Gas microequivalent cation conductivity feedwater heat recovery steam generator well integrity phosphate hideout condensate treatment program purity riser corrosion boiler water Phosphate Treatment...
Journal Articles
Trans. 136 (01): 195–205.
Paper Number: SPE-940195-G
Published: 01 December 1940
..., Inc. Copyright has expired. Upstream Oil & Gas clay suspension experiment hydroxide metallic ion hofmeister series viscosity suspension determination Garrison drilling fluids and materials concentration shale hydration Water Suspension dispersion milliequivalent texas clay...
Proceedings Papers

Paper presented at the SPE Oilfield and Geothermal Chemistry Symposium, April 9–11, 1985
Paper Number: SPE-13575-MS
... in the order: Figs. 7 and 8 consider the alkali as it affects the concentration of the cationic electrolyte in the system. A linear relationship exists between the optimal salinities at various surfactant concentrations and total milliequivalents (meq.) of univalent cation in a system (Fig. 7...
Journal Articles
Petrophysics 12 (02).
Paper Number: SPWLA-1971-vXIIn2a2
Published: 01 March 1971
... from most other cation exchange methods in that a direct reading of the exchange capacity of the formation is obtained. Shale Factor results are expressed as milliequivalents per lOOg of sample. The following materials are required to estimate the Shale Factor of formation cuttings. ( 1) Methylene blue...
Proceedings Papers

Paper presented at the International Symposium on Oilfield Chemistry, February 5–7, 2003
Paper Number: SPE-80209-MS
...Fig. 6 Ammine-Complex CEC (ICP) lon Analysis (milliequivalents per litre) ...
Journal Articles
J Pet Technol 3 (05): 151–158.
Paper Number: SPE-951151-G
Published: 01 May 1951
... and electron micro- graph data raise some question as to whether the Garfield, Washington, clay mineral is nontronite or illite, the cation exchange capacity of 90 milliequivalents per 100 grams would be good evidence against the latter. This follows from the well-known fact that the montmorillonites have...
Proceedings Papers

Paper presented at the SPE California Regional Meeting, April 2–4, 1975
Paper Number: SPE-5369-MS
... separation by ASTM D2548-69 and titration of the weighed sulfonate, offers some advantage but suffers in that high equivalent weight sulfonates tend to be lost in ASTM D2548-69. The method described in Appendix C com- bines the titrimetric determination of concentration in milliequivalents per milli- liter...
Journal Articles
Petrophysics 24 (03).
Paper Number: SPWLA-1983-vXXIVn3a1
Published: 01 May 1983
... and its quantity measured. The results are ex- pressed in milliequivalents per 100 grams of rock. These CEC measurements are currently being used as an aid in establishing water saturation (S,) by providing a value for Qv, which has the dimension of cation exchange capacity per unit pore volume, for use...
Journal Articles
SPE J. 23 (02): 231–237.
Paper Number: SPE-9873-PA
Published: 01 April 1983
... ft (312 m) with magnesium sulfate. Rate of MgSO 4 addition is equal to 0.060 meq/min (1.0×10 -3 meq/s). The milliequivalents of barium ion in each sample were calculated using Eq. 3 . (3) meq   of   Ba + + = i × t [ MgSO 4 ] , where i...

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