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Profile control system and preparation method thereof

A system and suspending agent technology, applied in the field of profile control system and its preparation, can solve the problems of low utilization rate of oily sludge, poor plugging performance, etc., achieve resource recycling and harmless treatment, and improve plugging performance , the effect of improving the utilization rate

Active Publication Date: 2019-04-12
YANGTZE UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiment of this application is to provide a profile control system and its preparation method, aiming to improve the low utilization rate of oily sludge and poor plugging performance in the profile control system

Method used

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  • Profile control system and preparation method thereof
  • Profile control system and preparation method thereof
  • Profile control system and preparation method thereof

Examples

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preparation example Construction

[0035] A method for preparing the above-mentioned profile control system. In parts by weight, oily sludge, emulsifying dispersant and water are mixed, stirred and pretreated to obtain a pretreatment system with a particle size of less than 42 μm, and the pH of the pretreatment system After adjusting to 6-8, mix with suspending agent to obtain thickened oily sludge, mix thickened oily sludge with cross-linking agent and gelatinize at a temperature of 55-65°C.

[0036] Wherein, a suspending agent solution can be prepared first, and the mass concentration of the suspending agent solution is 1000-6000 mg / L. The oily sludge and emulsifying dispersant can be mixed with water separately first and then mixed to make the pretreatment system fully emulsified and dispersed. Wherein, the process of stirring can be carried out in a blender. The pH of the pretreatment system can also be adjusted to 7.

Embodiment 1

[0039] This embodiment provides a profile control system, the preparation method of which profile control system comprises:

[0040] (1) configuration solution mass concentration is the suspending agent of 6000mg / L, and this suspending agent is FPAM;

[0041] (2) 10g of glacial acetic acid, 6g of ethylenediamine and 15g of CrCl 3 ·6H 2 O was dissolved in 100g of water to form a chromium crosslinking agent; 0.4g of sodium secondary alkyl sulfonate and 0.2g of propylene glycol block polyether were dissolved in 25g of water to form an emulsified dispersant solution; 60g of Changqing oil field tank bottom Sludge is dissolved in 25g of water to obtain an aqueous solution of oily sludge;

[0042] (3) Add the emulsified dispersant solution and the oily sludge aqueous solution into the mixer for stirring pretreatment to obtain a pretreatment system with a particle size of less than 42 μm, wherein the particle settling time is more than 5 hours, and the oil-water separation time is m...

Embodiment 2

[0050] This embodiment provides a profile control system, the preparation method of which profile control system comprises:

[0051] (1) configuration solution mass concentration is the suspending agent of 6000mg / L, and this suspending agent is FPAM;

[0052] (2) 10g of glacial acetic acid, 6g of ethylenediamine and 15g of CrCl 3 ·6H 2 O was dissolved in 100g of water to form a chromium crosslinking agent; 0.4g of sodium secondary alkyl sulfonate and 0.2g of propylene glycol block polyether were dissolved in 25g of water to form an emulsified dispersant solution; 60g of Changqing oil field was dried Pool sludge is dissolved in 25g water to obtain an oily sludge aqueous solution;

[0053] (3) Add the emulsified dispersant solution and the oily sludge aqueous solution into the mixer for stirring pretreatment to obtain a pretreatment system with a particle size of less than 42 μm, wherein the particle settling time is more than 5 hours, and the oil-water separation time is more...

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Abstract

The invention provides a profile control system and a preparation method thereof, and relates to the technical field of a profile control system for an oil field. The profile control system comprises, by weight, 0.1-0.5 part of a suspending agent, 0.1-0.9 part of a crosslinking agent, 0.2-2 parts of an emulsifying dispersing agent, 20-60 parts of oil-containing sludge and 40-55 parts of water, wherein the suspending agent is an amphiphilic hydrophobically associated polymer, the amphiphilic hydrophobically associated polymer has amphiphilic characteristics and is compounded with the emulsifying dispersing agent to achieve a synergistic effect on one hand, so that the emulsifying dispersing performance of the profile control system is enhanced, on the other hand, the characteristics of temperature resistance and saline tolerance and spatial mesh structure of the amphiphilic hydrophobically associated polymer are used, and therefore the suspending performance of the profile control system is excellent. The above characteristics allow the profile control system to form stable gel under the situation of high oil-containing sludge content, and better sealing performance is achieved.

Description

technical field [0001] The invention relates to the technical field of profile control systems for oil fields, and in particular to a profile control system and a preparation method thereof. Background technique [0002] Oily sludge is produced in the production process of crude oil treatment, operation, gathering and transportation. At present, one of the treatment methods for oily sludge at home and abroad is to use the advantage that the oily sludge originates from the formation and has good compatibility with the formation, and compound it into an oily sludge profile control system, inject it back into the formation, and play a role in water injection well regulation. Dissecting and improving the effect of water flooding. [0003] However, the following problems exist in the actual process of sludge profile control and water plugging: (1) Due to the different properties of oil, water, and mud in oily sludge in different sludges, water separation and oil separation occur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/512
CPCC09K8/5083C09K8/5086C09K8/512
Inventor 苏高申陈思雅罗跃罗霄周鑫陈志刚王俊松铁成军杨富顾中波蔡琳琳陆育军丁金岗王选涛冯永兵张宏岗张正翔
Owner YANGTZE UNIVERSITY
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