In the process of oil drilling, deep oil first by the spray or the pumped method was mined, this is called a oil production, a mining out a handful of oil production to crude oil, went to a after mining in oil Wells of the injected water in layers can be further from lots of crude oil, and this is the second oil production. And quadratic after oil, crude oil recovery of 30% on average only 50%. That is to say, in the original strata and 65%-70% of the oil fails to get mining, one reason is because of viscous force and capillary force exist that make the residual oil to discontinuous oil film and oil bead is circle in reservoir rocks in catching the pore, the geological crude oil in mining out further called tertiary oil recovery.
From three yuan (alkali/Surfactant/Polymer, English Alkaline/Surfactant/Polymer abbreviations for ASP) is the 1980 s developed a kind of tertiary oil recovery technology, its characteristic is using the surface active agent and alkali synergies among, the composite department/the original form of super-low interfacial tension, alkali can reduce active on the oil the adsorption, retention and loss; The main flow control of polymer on function, the results show that the active agent in the flooding of plays an extremely important role, directly affect oil displacement system/crude oil of interfacial tension between, a new method and emulsification etc.
New surfactants features:
1. The soluble in water does not occur after ionization, in the water at the molecular state is, not ion state is.
2. Because of molecular does not contain carboxylic acid base, sulfonic acid base, sulfuric acid, such as acid group, so not formed and metal ion precipitation. Also won't happen ion exchange, so in the stratum less wear of adsorption.
3. Because of molecular not charged, so don't be strong electrolyte influence.
4. According to its flooding (non-alkali flooding) good adaptability.
5. Extracted oil emulsion easily broken breast.
New surfactant performance and main index important physical:
Effective content: > 50%
Watch live agent solubility (20 ℃ product solubility) : soluble > 10%
Liquidity (viscosity) 20 ℃ : < 150 mpa. S
Interface activity: < 10-1 mN/m
Safety environmental:
Flash point: > 93 ℃
Security: the dangerous goods, avirulent, without excitant strong.
Environmental protection sex (OP/NP); Products (including its hydrolysis and degradation products) do not contain OP and NP kind poisonous, the hormonal additives, the people and the environment without damage.
Flash point: > 93 ℃
Security: the dangerous goods, avirulent, without excitant strong.
Environmental protection sex (OP/NP) : products (including its hydrolysis and degradation products) do not contain OP and NP kind poisonous, the hormonal additives, the people and the environment without damage.