Ternary composite flooding well scale remover as well as preparation method and application method thereof
A ternary compound and descaling agent technology, which is applied to chemical instruments and methods, earthwork drilling, wellbore/well parts, etc., can solve problems such as corrosion and environmental protection, poor descaling effect, etc., to prolong pump inspection period, The effect of promoting smooth operation of production
Inactive Publication Date: 2018-10-09
长春市华泰石油科技开发有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to provide a three-component compound oil flooding well descaling agent and its preparation method and application method in order to solve the existing problems of poor descaling effect of the existing acidic descaling agent, corrosion and environmental protection.
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Embodiment 1
[0032] ASP flooding well descaling agent: weigh 50 parts of NTA, 0.2 part of CMC, 0.1 part of SAS, 50 parts of TEA and Na 2 SO 3 0.1 part.
[0033] Descaling solution: Take 2 parts of ASP flooding well descaling agent, 1 part of MEA and 5 parts of water, and mix at 45°C for 2 hours.
Embodiment 2
[0035] ASP flooding well descaling agent: weigh 60 parts of NTA, 2 parts of HEC, 2 parts of SAS, 45 parts of TEA and Na 2 SO 3 1 serving.
[0036] Descaling solution: Take 2 parts of ASP flooding well descaling agent, 0.5 part of TEA, 0.5 part of MEA and 5 parts of water, and mix at 85°C for 1 hour.
Embodiment 3
[0038] ASP flooding well descaling agent: Weigh 50 parts of DTPA, 1 part of HEC, 1 part of SAS, 45 parts of TEA and Na 2 SO 3 1 serving.
[0039] Descaling solution: Take 3 parts of ASP flooding well descaling agent, 1 part of MEA and 4 parts of water, and mix at 65°C for 1.5 hours.
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The invention discloses a ternary composite flooding well scale remover as well as a preparation method and application method thereof, and belongs to the technical field of the oil production engineering. The scale remover is prepared from the following components in parts by weight: 50-60 parts of chelating agent, 0.2-2 parts of dispersing agent, 0.1-2 parts of surfactant, 45-50 parts of synergist and 0.1-2 parts of stabilizer. The ternary composite flooding well scale remover, the synergist and water are mixed in a mass ratio being 2 to 1 to (5-7) to obtain a scale removing solution. According to the ternary composite flooding well scale remover provided by the invention, nucleation is prevented, and silicon dioxide particles are dispersed and are prevented from being gathered, two dosing processes which are an electric dosing process and a pressure difference type dosing process are adopted, and continuous and effective scale inhibitor concentration is formed in the solution, so that relatively good effect on oil well scale-forming and clearing which takes silicate scales and carbonate scales as the principal things is achieved, a pump inspection period is prolonged and stableproduction is promoted.
Description
technical field [0001] The invention belongs to the technical field of oil recovery engineering, and in particular relates to a three-element compound oil flooding well descaling agent and its preparation method and application method. Background technique [0002] The strong alkali ASP flooding technology is an important measure to further enhance the oil recovery in the late stage of high water cut in the oilfield. During the injection of the ASP flooding system into the formation, after the alkaline chemical agent is injected into the formation, it is affected by the formation temperature, pressure, and ion composition. Influenced by factors such as the pH value of the injection system and the injection system, serious scaling occurs in the oil well, which affects the production of the mechanical recovery well. [0003] At present, the scaling of ASP flooding is mainly silicate scale and carbonate scale. Among them, the scale composition is mainly silicate in the early st...
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IPC IPC(8): C09K8/528E21B37/06
CPCC09K8/528E21B37/06
Inventor 邴长智
Owner 长春市华泰石油科技开发有限公司
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