Determination of acrylic polymer concentrations in drilling fluid

Authors: A.A. Zhivaev (IKF-Services ZAO, RF, Volzhsky), S.V. Vasilchenko (M-I DRILLING FLUIDS U.K. LIMITED, RF, Moscow), S.V. Medentsev (M-I DRILLING FLUIDS U.K. LIMITED, Kazakhstan, Almaty)
E-mail: azhivayev@miswaco.slb.com,
svasilchenko@miswaco.slb.com, smedentsev@miswaco.slb.com
Key words: partially hydrolyzed polyacrylamide, acrylamide, sodium acrylate, copolymer, concentration, determination, drilling fluid.

The new method of quantitative determination of acrylamide and sodium acrylate copolymers in a non-dispersed water-based drilling fluid is developed and verified. The advantage of the method constructed is a possibility to measure the concentrations of partially hydrolyzed polyacrylamide and sodium polyacrylate having different composition and molecular weight. The concentrations of both polymers can be measured in a mud simultaneously. The method does not require complex lab equipment and can be recommended for use at a rig.

References
1. Taylor K.C., Nasr-El-Din H.A., Acrylamide copolymers: A review of methods
for the determination of concentration and degree of hydrolysis, J. Pet. Sci. Eng., 1994, V. 12, no. 1, pp. 9–23.
2. Beazley P.M., Quantitative determination of partially hydrolyzed polyacrylamide
polymers in oil field production water, Anal. Chem.,1985, V. 57, no. 11, pp. 2098 - 2101.
3. Hawn G.G., Talley C.P., Gas chromatographic determination of polyacrylamide
after hydrolysis to ammonia, Anal. Chem., 1981, V. 53, no. 4, pp. 731–732.
4. Scoggins M.W., Miller J.W., Determination of water-soluble polymers containing
primary amide groups using the starch-triiodide method, SPEJ, 1979, V. 19, no. 3, pp. 151–154.
5. Taylor K.C., Burke R.A., Nasr-El-Din H.A., Schramm L.L., Development of a
flow injection analysis method for the determination of acrylamide copolymers in brines, J. Pet. Sci. Eng., 1998, V. 21, no. 1–2, pp. 129–139.
6. Kuehne D.L., Shaw D.W., Manual and automated turbidimetric methods for the determination of polyacrylamides in the presence of sulfonates, SPEJ, 1985, V. 25, no. 5, pp. 687–692.
7. Pradip, Attia Y.A., Fuerstenau D.W., The adsorption of polyacrylamide flocculants on apatites, Colloid Polym. Sci., 1980, V. 258, no. 12, pp. 1343–1353.
8. Lu J., Wu L., Spectrophotometric determination of substrate-borne  polyacrylamide, J. Agric. Food Chem., 2002, V. 50, no. 18, pp. 5038–5041.
9. OFI Testing Equipment. Ammonia extraction test kit, “Polyplus”. Test kit for the determination and amount of PHPA Polymer in drillings fluids by the Ammonia
Extraction Method, USA, Texas, Houston: OFITE, 2 p. 
10. Palma Sr. R.J., Barad J., Palkowetz Jr. J.M., Field assay of polyacrylamide in
drilling fluids, Anal. Lett., 1984, V. 17, no. 10, pp. 897–904.
11. Abramova L.I., Bayburdov T.A., Grigoryan E.P. et al., Poliakrilamid (Polyacrylamide), Moscow: Khimiya Publ., 1992, 192 p.
12. Volynets V.F., Volynets M.P., Analiticheskaya khimiya azota (Analytical
chemistry of nitrogen), Moscow: Nauka Publ., 1977, 307 p.
13. MГЎzor L., Methods of organic analysis, Amsterdam; New York, Elsevier Scientific Pub. Co., 1983.
14. Lur'e Yu.Yu., Rybnikova A.I., Khimicheskiy analiz proizvodstvennykh
stochnykh vod (Chemical analysis of industrial waste water), Moscow: Khimiya Publ., 1974, 336 p.
15. McCulley L.Z., Malachosky E., A new method for the quantitative  determination of the PHPA polymer content of drilling fluids and other aqueous systems, SPE 22580.
16. Kreshkov A.P. Osnovy analiticheskoy khimii. Teoreticheskie osnovy. Kolichestvennyy analiz (Fundamentals of analytical chemistry. Theoretical framework. Quantitative analysis), Book 1, Moscow: Khimiya Publ., 1976, 480 p.


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