Water purifying agent for treatment process of polymer-containing sewage pipeline of offshore oil field and application of water purifying agent

A technology for offshore oil fields and sewage pipelines, applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. The effect of breaking up, fast floating, and fast floc formation

Active Publication Date: 2017-02-15
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in the face of the limited space of offshore oil production platforms, the above three characteristics highlight the difficulty in the treatment of polymer-containing sewage. Traditional water treatment technologies have found it difficult to treat offshore oilfield polymer-containing sewage to meet standards.

Method used

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  • Water purifying agent for treatment process of polymer-containing sewage pipeline of offshore oil field and application of water purifying agent
  • Water purifying agent for treatment process of polymer-containing sewage pipeline of offshore oil field and application of water purifying agent
  • Water purifying agent for treatment process of polymer-containing sewage pipeline of offshore oil field and application of water purifying agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Preparation of water purifying agent: Add 54kg of ionized water, 20kg of polyaluminum ferric silicate, 15kg of polyaluminum trichloride and 1.0kg of sodium carboxymethyl starch in sequence, and then add 10kg of polydimethylsilica after complete dissolution Allyl ammonium chloride is stirred evenly at a speed of 100-150 rpm to obtain the water purifying agent YTJS-01 for the treatment process of the pipeline mixer of the pipeline containing poly in offshore oilfields.

[0017] Performance evaluation:

[0018] Experimental groups 1 and 2 evaluated the performance of water purifiers for two kinds of polymer-containing sewage respectively, and each group of experiments conducted three parallel experiments, and the parallel experiment numbers were A, B, and C. The experimental results are listed in Table 1.

[0019] Table 1 Experimental results of water purifier YTJS-01 treating poly-containing sewage in an offshore oilfield

[0020]

[0021]

[0022] Note: OLW is oi...

Embodiment 2

[0024] Preparation of water purifying agent: Add 60.75kg of ionized water, 18kg of polyaluminum iron silicate, 13kg of polyaluminum trichloride and 0.75kg of sodium carboxymethyl starch in sequence, and add 7.5kg of polydimethyl starch after completely dissolving Base diallyl ammonium chloride, stirring evenly at a speed of 100-150 rpm to obtain the water purifier YTJS-02 for the treatment process of the pipeline mixer of the poly-containing sewage pipeline in the offshore oil field.

[0025] Performance evaluation:

[0026] Experimental groups 1 and 2 evaluated the performance of water purifiers for two kinds of polymer-containing sewage respectively, and each group of experiments conducted three parallel experiments, and the parallel experiment numbers were A, B, and C. The experimental results are listed in Table 2.

[0027] Table 2 Experimental results of water purifier YTJS-02 treating poly-containing sewage in an offshore oilfield

[0028]

Embodiment 3

[0030] Preparation of water purifying agent: Add 69.5kg of ionized water, 15kg of polyaluminum iron silicate, 10kg of polyaluminum trichloride and 0.5kg of sodium carboxymethyl starch in sequence, and add 5kg of polydimethyl starch after completely dissolving Diallyl ammonium chloride is stirred evenly at a speed of 100-150 rpm to obtain the water purifying agent YTJS-03 for the treatment process of a pipeline mixer containing poly in offshore oilfields.

[0031] Performance evaluation:

[0032] Experimental groups 1 and 2 evaluated the performance of water purifiers for two kinds of polymer-containing sewage respectively, and each group of experiments conducted three parallel experiments, and the parallel experiment numbers were A, B, and C. The experimental results are listed in Table 3.

[0033] Table 3 Experimental results of water purifier YTJS-03 treating poly-containing sewage in an offshore oilfield

[0034]

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Abstract

The invention discloses a water purifying agent for a treatment process of a polymer-containing sewage pipeline mixer of an offshore oil field and application of the water purifying agent. The water purifying agent comprises the following components by weight percent: 15.0%-20.0% of poly-silicate aluminum ferrum (PSAF), 10.0%-15.0% of poly-aluminum chloride (PAC), 5.0%-10.0% of poly-dimethyl diallyl ammonium chloride (PDA with a molecular weight of 4*10<5>g/mol-5*10<5>g/mol), 0.5%-1.0% of sodium carboxymethyl starch (CMS) and the balance of deionized water. The preparation method comprises the steps of adding poly-aluminum chloride, poly-silicate aluminum ferrum and sodium carboxymethyl starch into water, after the components are completely dissolved, adding poly-dimethyl diallyl ammonium chloride, uniformly stirring at the rotation speed of 100rpm-150rpm, so as to obtain the water purifying agent. The water purifying agent has the characteristics that flocs are compact, are rapidly formed and are high in settling velocity, a water body is strong in adaptability, effects of removing suspended solids and oil are good, the polymer-containing sewage with high content of oil field suspended solids can be effectively treated, and the reaction speed is suitable for the enhanced coagulation treatment process of the pipeline mixture.

Description

technical field [0001] The invention belongs to the technical field of oilfield sewage treatment, and in particular relates to a water purifying agent used in the treatment process of a pipeline mixer for polymer-containing sewage pipelines in offshore oilfields, and a preparation method and application thereof. Background technique [0002] With the continuous development of the petroleum industry, polymer flooding technology, as a technology to enhance oil recovery, has played an important role in ensuring the stable and increasing production of crude oil and water control in my country. Due to the need for efficient development, polymer flooding technology has gradually been popularized and applied in offshore oilfields in my country. But at the same time, polymer flooding technology also brings many negative effects, among which the treatment of polymer-containing sewage is extremely difficult. Compared with conventional water flooding oil production wastewater, polymer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/54C02F1/56C02F1/52C02F1/40C02F103/10
CPCC02F1/40C02F1/52C02F1/5236C02F1/5263C02F1/54C02F1/56C02F2103/10
Inventor 王会孙继靳晓霞徐俊英李立峰侯洋赵迎秋
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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