Alkali/surfactant/polymer (ASP) flooding calcium-silicon-barium scale inhibitor and preparation method thereof
A three-component composite and scale suppression technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of complex scaling speed and composition of three-component composite flooding wells, affecting normal production of oil wells, and increasing the difficulty of on-site construction, etc. , to achieve simple and easy-to-control production process, solve frequent pump inspections, and achieve good results
Active Publication Date: 2013-08-07
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
There are more barium ions in the oil-water system of individual blocks, which makes the scaling of ASP flooding wells faster, the composition is more complex, and the pump inspection cycle is shortened (minimum 20 days), which affects the normal production of oil wells and increases the difficulty of on-site construction
Method used
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Embodiment 1
[0028] At room temperature, after mixing 150kg of acrylic acid and 80kg of hydrogen peroxide evenly, pump it into a high-level tank a1 with a chemical pump; make 10% solution of 100kg of sodium hydroxide, and then add 90kg of 2-acrylamido-2-methylpropanesulfonate Acid, solution pH=9.0, place in another elevated tank b2 after being mixed evenly at room temperature; Start the reactor 5 steam inlet valve and start heating the reactor to 60°C, open the reactor condenser 4 reflux valve; Acid anhydride and 100kg demineralized water are put into the reactor 5, and the temperature of the reactor 5 is gradually increased to 80° C. while stirring, and the hydrolysis reaction is carried out for 0.5 hour, which is used to prevent the decomposition reaction of hydrogen peroxide in the follow-up reaction; sodium hypophosphite, 90kg sodium hypophosphite, after dissolving completely, drop into 1.5kg ferrous ammonium sulfate again; Open the valves of the above-mentioned two high-level tanks, na...
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The invention relates to an alkali / surfactant / polymer (ASP) flooding calcium-silicon-barium scale inhibitor and a preparation method thereof. The ASP flooding calcium-silicon-barium scale inhibitor comprises the following raw materials in percentage by mass: 15 to 30 percent of acrylic acid, 5 to 9 percent of 2-acrylamide-2-methylpropanesulfonic acid, 5 to 10 percent of sodium hydroxide, 10 to 20percent of maleic anhydride, 3 to 10 percent of sodium hypophosphite, 8 to 20 percent of sodium allylsulfonate, 8 to 19 percent of 35 percent hydrogen peroxide (H2O2), 14 to 20 percent of softened water and 0.001 to 0.003 percent of ammonium ferrous sulfate. The preparation method for the inhibitor comprises the following steps of: uniformly mixing the raw materials in an elevated tank at room temperature, putting into a reaction kettle, controlling reaction time and temperature, cooling to the temperature of 50 DEG C after reaction is finished, and discharging from the tower bottom of the reaction kettle. The inhibitor can effectively solve the problems of frequent pump inspection and a short pump inspection cycle which are caused by calcium-silicon-barium deposition in an oil field ASP flooding oil well lifting system.
Description
Technical field: [0001] The invention relates to a three-element compound oil flooding inhibitor used in the field of oil recovery, in particular to an three-element compound flooding calcium, silicon and barium scale inhibitor and a preparation method thereof. Background technique: [0002] The extraction process of crude oil can be divided into three stages. The first stage refers to the eruption of crude oil by the pressure of the formation, and the recovery rate is about 15%; the second stage is the secondary oil recovery in which water is injected from the well to maintain the formation pressure, and the recovery rate is about 15% to 20%. ; The third stage is the tertiary oil recovery of tailings oil recovery using new technologies of physics, chemistry and biology, and the recovery rate is about 20% or more. [0003] ASP flooding, as the most effective tertiary oil recovery technology developed in recent years, is a composite flooding system composed of alkali / surfact...
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IPC IPC(8): C09K8/52C08F220/06C08F220/58C08F222/06C08F228/02
Inventor 高清河马淑清钱慧娟张丽刘洪胜侯志峰徐克明陈新萍
Owner BC P INC CHINA NAT PETROLEUM CORP