Quantitative analysis method for interfacial tension performance of petroleum crude oil ternary compound system and determination method of ternary compound system
A technology of interfacial tension and ternary compounding, applied in the direction of surface tension analysis, etc., can solve problems such as analysis, inability to quantify interfacial tension performance, inapplicability, etc., and achieve the effect of simple method, good operability and practicability, and small error
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Embodiment 1
[0029] Embodiment 1, utilize interfacial tension performance index to carry out quantitative analysis to ternary composite system
[0030] 1. Prepare the ternary composite system to be tested
[0031] 1.1 Preparation of surfactant mother liquor (concentration is 10wt%)
[0032] Take 20.0 g of sodium alkylbenzene sulfonate with an effective content of 50%, add 80.0 g of simulated oilfield formation water, and shake well. Surfactant can choose alkylbenzene sulfonate, petroleum sulfonate or petroleum carboxylate etc.
[0033] 1.2 Preparation of alkali mother liquor (concentration is 30wt%)
[0034] Take 30.0 g of NaOH solid in a clean and dry beaker, slowly add 70.0 g of simulated oilfield formation water, and stir until the solid is completely dissolved.
[0035] 1.3 Preparation of polymer mother liquor (concentration is 2000ppm)
[0036] Take 2.273g of polyacrylamide dry powder (HPAM, molecular weight: 25 million), and add it into 997.727g of simulated oilfield formation wa...
Embodiment 2
[0084] Example 2, using the interfacial tension performance index to determine the ternary composite system to be tested
[0085] Calculated according to formula (3) in 5, when the oil displacement efficiency E=20%, the interfacial tension performance index S=1000 of the ternary composite system, that is to say want to make the oil displacement efficiency E>20%, three The interfacial tension performance index S of the meta-composite system must be >1000. Therefore, when using the interfacial tension performance index to determine the ternary composite system to be tested, as long as the calculated interfacial tension performance index S>1000, the ternary composite system to be tested is qualified. Combined with Table 2, it can be seen that 1 # The ternary compound system to be tested is a standard ternary compound system, and the ternary compound systems to be tested in 2# and 3# are qualified ternary compound systems.
[0086] In order to determine the qualified ternary com...
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