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Temperature-resistant salt-resistant HPAM/Cr<3+>/phenolic aldehyde compound crosslinked weak gel profile adjusting and water plugging agent and preparation method thereof

A profile control water shutoff agent, heat-resistant and salt-resistant technology, applied in the direction of chemical instruments and methods, drilling compositions, etc. Good salt performance, high gel strength, and improved heat and salt resistance

Inactive Publication Date: 2014-12-10
JINGZHOU DADI PETROLEUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many kinds of profile control agent systems at home and abroad, but there are some performance deficiencies (such as poor temperature resistance and salt resistance), or they are easily affected by minerals in the reservoir, or cause damage to the formation, etc.

Method used

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  • Temperature-resistant salt-resistant HPAM/Cr&lt;3+&gt;/phenolic aldehyde compound crosslinked weak gel profile adjusting and water plugging agent and preparation method thereof
  • Temperature-resistant salt-resistant HPAM/Cr&lt;3+&gt;/phenolic aldehyde compound crosslinked weak gel profile adjusting and water plugging agent and preparation method thereof
  • Temperature-resistant salt-resistant HPAM/Cr&lt;3+&gt;/phenolic aldehyde compound crosslinked weak gel profile adjusting and water plugging agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] First weigh each raw material according to the following amounts:

[0047] Partially hydrolyzed polyacrylamide (HPAM): 0.10%

[0048] Metal crosslinking agent: 0.001%

[0049]Organic crosslinking agent: 0.03%

[0050] Ammonium chloride: 0.2%

[0051] The remainder is water;

[0052] Add ammonium chloride into water and stir to make it fully dissolved; then add partially hydrolyzed polyacrylamide and stir with a stirrer for 30 minutes, then age at room temperature for 12 hours. After 12 hours, add the metal cross-linking agent and stir evenly, then place it at room temperature for 6 hours to obtain a weak gel complexed by metal ions; add the organic cross-linking agent to the synthesized weak gel, stir it evenly and place it Keep the temperature in a water bath at 75°C for 24 hours to allow polymerization to occur, and a reddish-brown viscous colloid is obtained, which is the heat-resistant and salt-resistant HPAM / Cr 3+ / Finished product of phenolic composite cross...

Embodiment 2

[0054] First weigh each raw material according to the following amounts:

[0055] Partially hydrolyzed polyacrylamide (HPAM): 0.10%

[0056] Metal crosslinking agent: 0.001%

[0057] Organic crosslinking agent: 0.04%

[0058] Ammonium oxalate: 0.3%

[0059] The remainder is water;

[0060] Ammonium oxalate was added to water and stirred to fully dissolve it; then partially hydrolyzed polyacrylamide was added and stirred with a stirrer for 30 minutes, then aged at room temperature for 12 hours. After 12 hours, add the metal cross-linking agent and stir evenly, then place it at room temperature for 6 hours to obtain a weak gel complexed by metal ions; add the organic cross-linking agent to the synthesized weak gel, stir it evenly and place it Keep the temperature in a water bath at 75°C for 24 hours to allow polymerization to occur, and a reddish-brown viscous colloid is obtained, which is the heat-resistant and salt-resistant HPAM / Cr 3+ / Finished product of phenolic compo...

Embodiment 3

[0062] First weigh each raw material according to the following amounts:

[0063] Partially hydrolyzed polyacrylamide (HPAM): 0.15%

[0064] Metal crosslinking agent: 0.002%

[0065] Organic crosslinking agent: 0.02%

[0066] Glacial acetic acid: 0.1%

[0067] The remainder is water;

[0068] Add glacial acetic acid into water, and stir; to fully dissolve it; then add partially hydrolyzed polyacrylamide, and stir with a stirrer for 30 minutes, then age at room temperature for 12 hours. After 12 hours, add the metal cross-linking agent and stir evenly, then place it at room temperature for 6 hours to obtain a weak gel complexed by metal ions; add the organic cross-linking agent to the synthesized weak gel, stir it evenly and place it Keep the temperature in a water bath at 75°C for 24 hours to allow polymerization to occur, and a reddish-brown viscous colloid is obtained, which is the heat-resistant and salt-resistant HPAM / Cr 3+ / Finished product of phenolic composite cro...

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Abstract

The invention relates to a temperature-resistant salt-resistant HPAM / Cr<3+> / phenolic aldehyde compound crosslinked weak gel profile adjusting and water plugging agent and a preparation method thereof, and belongs to the technical field of oilfield profile adjusting and water plugging. The profile adjusting and water plugging agent is prepared from the following raw materials in percentage by weight: 0.10-0.20 percent of partial hydrolysis polyacrylamide, 0.001-0.008 percent of metal cross-linking agent, 0.02-0.08 percent of organic cross-linking agent, 0.05-0.6 percent of pH regulator and the balance of water. The profile adjusting and water plugging agent is low in initial viscosity and high in injectivity and has high strength after formation gelling, and the plugging property of common weak gel is greatly improved. Moreover, the gelling time is adjustable, plugging at immediate vicinity of wellbore is avoided, the most permeable zone and pore channels are effectively blocked on a target layer, the water injection profile is effectively adjusted, deep profile control can be effectively performed, and the crude oil recovery rate is improved.

Description

technical field [0001] The invention relates to a heat-resistant and salt-resistant HPAM / Cr 3+ The invention discloses a phenolic compound cross-linked weak gel profile control and water shutoff agent and a preparation method thereof, belonging to the technical field of oil field profile control and water shutoff. Background technique [0002] Most of my country's oil fields are developed by water injection. With the deepening of water injection development, the heterogeneity of the stratum is intensified, which leads to serious water production or even water flooding of oil wells, which seriously affects the oil field production. [0003] In order to increase oil production and reduce water loss in oilfields, the technology of profile control and water shutoff has been paid more and more attention by petroleum workers. This technology consists of two parts: oil well water shutoff and water well profile control. It can not only effectively realize the profile control and wa...

Claims

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Application Information

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IPC IPC(8): C09K8/512C08J3/24
CPCC09K8/512C09K8/5045C09K8/5083
Inventor 秦义刘玉莉张顶学廖锐全
Owner JINGZHOU DADI PETROLEUM TECH CO LTD
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