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Nanoparticle sealing channeling water shutoff agent for oil wells

A technology of nano-particles and water blocking agents, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of small oil well cement plugging radius, low organic strength, and short plugging validity period, etc., to achieve plugging High strength, long effective period, and long effective period of plugging effect

Inactive Publication Date: 2013-04-10
XINJIANG GRAND OILFIELD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is: in order to overcome the defects of small oil well cement plugging radius, low organic strength, and short plugging validity period for plugging micro-cracks and low-permeability formations, to provide a kind of oil well nano-particle water blocking agent

Method used

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  • Nanoparticle sealing channeling water shutoff agent for oil wells
  • Nanoparticle sealing channeling water shutoff agent for oil wells

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: adopt nano particle size analyzer to carry out particle size determination to solution of the present invention

[0010] Table 1 Particle size characteristics of oil well nanoparticle water blocking agent

[0011]

Embodiment 2

[0012] Embodiment 2: first adopt the planetary ball mill PM400 that German Restsch company produces respectively to calcium oxide, silicon oxide, aluminum oxide, iron oxide, Na 2 SiO 3 , Bentonite, acetone and formaldehyde condensation polymer are ground to make the particle size reach 1-100nm. Then pour 0.15 grams of triethanolamine, 0.06 grams of KCL, and 0.1 grams of iron chromium lignosulfonate into a high-speed mixing cup filled with 39.02 grams of fresh water to fully dissolve, then add 23 grams of ground calcium oxide and 18 grams of silicon oxide , 7 grams of alumina, 4 grams of iron oxide, Na 2 SiO 3 0.04 grams of bentonite, 0.42 grams of bentonite, 0.1 grams of polycondensate of acetone and formaldehyde, stirred in a high-speed mixing cup at 10,000 rpm for 3 minutes, poured the stirred blocking agent into a special pressure measurement mold to make a pressure measurement module, and heated it at 50°C Water bath for 3 days, 7 days, and 28 days respectively, and me...

Embodiment 3

[0015] Embodiment 3: first adopt the planetary ball mill PM400 that German Restsch company produces respectively to calcium oxide, silicon oxide, aluminum oxide, iron oxide, Na 2 SiO 3 , Bentonite, acetone and formaldehyde condensation polymers are ground to make the particles reach 1-100nm. Then pour 0.18 grams of triethanolamine, 0.08 grams of KCL, and 0.15 grams of iron chromium lignosulfonate into a high-speed mixing cup filled with 47.13 grams of fresh water to fully dissolve, then add 25 grams of ground calcium oxide and 21 grams of silicon oxide , 8.5 grams of alumina, 5.4 grams of iron oxide, Na 2 SiO 3 0.05 grams of bentonite, 0.5 grams of bentonite, 0.12 grams of acetone and formaldehyde polycondensate, stirred in a high-speed mixing cup at 10,000 rpm for 3 minutes, mixed the stirred test slurry with the soaked core particles and poured it into a steel cylinder ( Due to the poor bonding of the core-steel cylinder interface, the plugging agent is mixed with the co...

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Abstract

The invention relates to a nanoparticle sealing channeling water shutoff agent for oil wells. The water shutoff agent is used for plugging microcracks and low-permeability strata. The invention can overcome the defects that the oil-well cement plug for plugging the effluent of the microcracks and the low-permeability strata has small radius, low organic strength and short plugging period of validity. The technical scheme is that the water shutoff agent is prepared from the following raw materials by mass (gram): 23 to 25g of calcium oxide, 18 to 21g of silicon oxide, 7 to 8.5g of alumina, 4 to 5.4g of ferric oxide, 0.15 to 0.18g of triethanolamine, 0.06 to 0.08g of KCL, 0.04 to 0.05g of Na2SiO3, 0.42 to 0.5g of bentonite, 0.1 to 0.12g of acetone and formaldehyde polycondensate, 0.1 to 0.15g of ferric chromium lignin sulfonate and 39.02 to 47.13g of fresh water. The water shutoff agent can form a solidified body which has high compressive strength, high toughness and long period of validity, and is slightly expanded at a plugging position through the coordination effect and chemical reactions of organic and inorganic components under downhole temperature and pressure conditions, can tightly plug various types of strata, and is used for the development of crude oil of oil wells.

Description

technical field [0001] The invention relates to an oil well nano particle water blocking agent for plugging micro-cracks and low-permeability formations, and is especially suitable for plugging micro-cracks in the situations of external channeling, casing deformation and damage, interlayer channeling and the like. Background technique [0002] With the gradual deepening of crude oil development in oil wells, oil fields have entered a high water-cut development period, and there are different types of water channeling and water damage in oil wells. Especially for the plugging of oil well pipes in low-permeability formations, casing deformation and damage, interlayer channeling, and high water-cut wells that are difficult to seal, the most common method is to inject oil into specific intervals of oil production wells or water injection wells. Squeeze injection of high-strength water blocking agent for permanent plugging or re-perforation to stabilize oil and control water and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/46
Inventor 白杨谭晓华刘建仪张广东王平全胡亚琴李丽
Owner XINJIANG GRAND OILFIELD TECH
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