Synthesis Of A Scale And Corrosion Inhibitor For Compound-combination Flooding

The mining of crude oil can is divided into three stages. The first stage point the crude oil the pressure near the geologic strata to spray to send out, its recovery efficiency about for 15%; At from spray of later stage, be infuse intoed by water well to the water to maintain the geologic strata pressure, call it for secondary oil recovery, its recovery efficiency about for 15%-20%; Water flooding is behind in the geologic strata's remaining the oil still occupy 60% -70%, the demand use the physics with the chemistry method the displacement. Use the chemistry the technique for of aqueous solution conduct and actions crude oil displacement agent to call the chemistry flooding oil the technique, and also call for tertiary oil recovery.Compound-combination Flooding is a kind of new skill that can explode oil for tertiary oil recovery, it belongs to the chemical flooding, compound-combination flooding points alkaline/surfactant/polymer, brief name ASP. For the compound-combination Flooding has used alkaline (NaOH or Na₂CO₃) ,that makes the oil exploding system form scaling in a large scale under the oil conservation environment and exploding system, it also prevents the compound-combination flooding from being widely used . While the Alkaline driven into the earth is having the interaction with the water under the earth, meanwhile it also is having interaction with the component part of mineral in the rocks, such kind of interaction can be divided into two sorts. First, the alkaline has interaction with the component part of mineral in the rocks, such as, Gadolinite, Feldspath, Montmorillonite, the silicon, aluminum contained in them is transformed from the solid form into the under earth water, such kind of action is called Corrosion Function. This function obviously has some changes or damages to the former stratum structure. Secondly, under certain circumstances the ions of the silicon and aluminum corroded from the rocks will re-form sediment of the aluminum sour salt of silicon, that is, under the function of the lye, the silicon and aluminum are corroded from the rocks and come into the under earth water, thenstay in some other places and formative a new phase, such kind of new phase or the dirt of aluminum of silicon also can stop up the space structure of the oil layer, reduce the spread area of the oil driven pharmaceutical and reduce the exploding rate.In the experiment of the Compound-combination Flooding in the Number One, Number Three and Number Four Oil Exploding Companies of the Daqing Oil Field, it is found out that there is a phenomena that the system has a serious scaling and the obstruction of the pump. It is very urgent to settle the scaling problem. Analyzing of the scale on the oil returning pipeline line and on the bar of the pumping unit, the main scale of Compound-combination Flooding oil well is the carbonate's calcium, magnesium scale and the calcium and magnesium of the silicate. To solve the problem of the working oil well forming scale, pour into the corrosion and scale inhibitor to prevent from the carbonate's calcium scale and silicate scale.According to the requirement to the Compound-combination flooding Scale Remove and Scale Inhibitor of the Daqing Oil Field, the Compound-combination Flooding Corrosion and Scale Inhibitor has been Synthesized. Pass orthogonal experiment, and make sure the best reaction the condition. Synthesize the process in the water phase inside pass the catalyst and cause occurrence to oxidize to restore to produce the free radicals, and make the reaction go on proceedings, and consumedly lowered the production cost; Respond the easy control of term, and operate in brief easy line, have no the pollution of the environment, and have no the discards to be emitted. The corrosion and scale inhibitor belong to the low phosphorus corrosion and scale inhibitor, it is up to the environmental protection the row to put the standard, prone to circulate the water inside the usage in the oilfield and industry.An evaluation method has been established to evaluate the Caustic...