[实用参考]Water Injection Technology(注水技术).ppt

Schematic of a Surfactant Polymer Flood water buffer slug Drive Polymer Micellar Oil bank Unwept zone Characterization of Surfactant: 1-Density : 2-M.Wt : (1006 gm/lit) (440 gm/mol) 3- Chemical composition : Element Concentration (ppm) Ca++ 17.35 Mg++ 1.72 Na+ 546.7 SO4-- 500 Cl- 71 C 279 H 52 N traces 4- Its critical Micell Concentration, CMC 5- its Agglomeration Number, N 6-Solubality Product, Ps Determination of chemical properties: 1- CMC determination a - By surface tension b - By Resistivity 2- Product of solubility (Ps) - By drawing its solubility Curve in fresh water in presence of CaCl2 2- Fresh water 3- Sea Water - It is prepared in the lab with the following composition “same as in Gulf area” Element Cl - SO 4 ++ CO 3 -- HCO 3 - Ca ++ Mg ++ Na + Total Salinity as NaCl Concentration (ppm ) 23735 3225 30 183 601 1520 13490 39195 Used Martials 1- Surfactant -Anionic Surfactant , Sulfonate group, its chemical and physical properties unknown CMC Determinations Conductivity(1/ohm.m) 0.10 0.80 0.70 0.60 0.50 0.40 0.30 0.20 CMC = 0.55 mol/lit 0.00 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 Surfactant concentration (mol/lit) Variation of conductivity with surfactant concentration Surfacetension(dyne/cm) 32.00 35.50 35.00 34.50 34.00 33.50 33.00 32.50 CMC = 0.55 mol/lit 31.50 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 Surfactant concentration (mol/lit) Variation of surface tension with surfactant concentration Determination of the Solubility Curve in CaCl2 S- + Na+ S2-Ca++ SNa 2S- + Ca++ = S2 * Ca++ Ps Log (Ps) = 2Log(S-) + Log Ca++ Log (Ca++) = Log (Ps) - 2 Log (S-) Y = a -b X (Pure Surfactant) precipitate Product of solubility (Ps) In the solution: CaCl2 Ca++ + 2Cl- Salt water 0.4mol/lit Salt water 0.5mol/lit Salt water 0.7mol/lit Salt water 0.6mol/lit Salt water 0.4mo