Polymer-containing sludge emulsion profile control system and preparation method thereof

A technology of poly-oil sludge and system, which is applied in the field of poly-oil-containing emulsified profile control system and its preparation, can solve the problems of oilfield oil sludge pollution in an effective and economical way, achieve the effect of improving the ability of emulsification profile control and meeting the requirements of profile control technology

Active Publication Date: 2020-02-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above methods have not been industrialized in domestic oil fields, and have not effectively and economically solved the problem of oil sludge pollution in oil fields

Method used

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  • Polymer-containing sludge emulsion profile control system and preparation method thereof
  • Polymer-containing sludge emulsion profile control system and preparation method thereof
  • Polymer-containing sludge emulsion profile control system and preparation method thereof

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preparation example Construction

[0038] The present invention also relates to the preparation method of the described polymer-containing oil sludge emulsification profile control system, which comprises the following steps:

[0039] (1) mixing the poly-containing oil sludge with water, optionally sieving the mixture;

[0040] (2) The emulsifier is uniformly mixed with the optionally sieved poly-oil sludge-water mixture at a concentration of 0.05-1.0%;

[0041] (3) Add T-type polyacrylamide as a suspension stabilizer and stir to obtain an emulsified suspension system;

[0042] (4) Then slowly add intensifiers A, B, C and D in sequence, and stir to obtain the emulsified profile control system containing poly-oil sludge.

Embodiment 1

[0054] Mix the poly-oil-containing sludge and sewage at a ratio of 1:5, and sieve the mixture. The particle size of the solid particles in the sieved poly-oil-containing sludge-water mixture is about 20 μm; add T-type polyacrylamide (weight average molecular weight 800 μm) to the beaker 10,000) as a suspension stabilizer, and make its concentration 2000mg / L. Afterwards, the emulsifier (which is a mixture of sodium dodecylbenzenesulfonate and dodecyldimethylsulfopropyl betaine (2:1)) is uniformly mixed with the water mixture containing poly oil sludge at a concentration of 0.1%, and added Stir in the beaker for 20min to prepare a stable emulsified suspension system; then slowly add enhancer A chromium lactate (concentration is 600mg / L), B ammonium nitrate (concentration is 600mg / L), C sodium thiosulfate (concentration is 400mg / L) L) and D oxalic acid (concentration: 400 mg / L), stirred for 15 minutes to obtain the emulsified profile control system containing poly-oil sludge.

...

Embodiment 2

[0057] Mix the poly-oil-containing sludge and sewage at a ratio of 1:7, and sieve the mixture. The particle size of the solid particles in the sieved poly-oil-containing sludge-water mixture is about 20 μm; add T-type polyacrylamide (weight average molecular weight 800 μm) to the beaker Ten thousand) as a suspension stabilizer, and make its concentration 3000mg / L. Afterwards, mix the emulsifier (sodium dodecylbenzenesulfonate) with a concentration of 0.2% and the water mixture containing poly-oil sludge evenly, add it to the beaker and stir for 20 minutes to prepare a stable emulsified suspension system; then slowly add the enhancer A in sequence Chromium lactate (1000mg / L), B ammonium nitrate (800mg / L), C urea (600mg / L) and D oxalic acid (1000mg / L), stirred for 30min to obtain the emulsified profile control system containing poly-oil sludge.

[0058] The gelling time of the obtained emulsified profile control system is 42 hours, the gelling strength is D, the breakthrough pre...

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Abstract

The invention relates to a polymer-containing sludge emulsion profile control system. The polymer-containing sludge emulsion profile control system includes (1) polymer-containing sludge, (2) water, (3) an emulsifier which is an anionic emulsifier or a sulfobetaine-type zwitterionic emulsifier, (4) a suspension stabilizer which is T-like polyacrylamide and (5) a reinforcing agent which is a mixture of A, B, C and D, wherein A is chromium lactate, B is ammonium salt, C is sodium thiosulfate or urea and D is acid. The invention further relates to a preparation method of the polymer-containing sludge emulsion profile control system.

Description

technical field [0001] The invention relates to a poly-oil sludge emulsification profile control system and a preparation method thereof. Background technique [0002] At present, the exploitation of most major oilfields in my country has entered the late stage, and polymer flooding plays an irreplaceable and important role in ensuring the stable production of crude oil in my country's oilfields. With the expansion of the application scale of polymer flooding, a large amount of polymer-containing sludge (referred to as polymer-containing sludge) is formed in the oilfield output fluid. Sludge is generally composed of oil, water, suspended particles, additives in the process of oil recovery and production fluid treatment, forming a complex system of oil-in-water, water-in-oil and multi-layer emulsification, which is a highly stable suspended emulsion liquid Tie. The oil sludge particles are fine, flocculated and high water content; the density difference between oil and wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/508
CPCC09K8/5083
Inventor 刘希明田玉芹杨斌陈雷李晓庆唐培忠辛爱渊胡秋平刘军付琛唐钢
Owner CHINA PETROLEUM & CHEM CORP
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