Unlock instant, AI-driven research and patent intelligence for your innovation.

Temporary plugging agent between honeycomb seams and preparation method thereof

A technology of honeycomb and temporary plugging agent, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of reducing the density of temporary blocking agent, high density of temporary blocking agent, slow blockage elimination, etc., and achieve an increase in dissolution rate , high pressure bearing capacity, low density effect

Active Publication Date: 2020-09-29
CHINA PETROLEUM & CHEM CORP +1
View PDF18 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned temporary plugging agents have been widely used in oil fields, there are two disadvantages: one is that the plugging is eliminated slowly, so it takes a long time to restore the original permeability after plugging, so the water solubility of the temporary plugging agent needs to be increased ; Second, the temporary plugging agent has a high density and is easy to settle in water, so it needs to be carried by a polymer, so it is necessary to reduce the density of the temporary plugging agent

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Preparation of temporary plugging agent between honeycomb seams and evaluation of its performance

[0022] Take 44.75g of acrylamide, 47.5g of natural polyurethane, 2g of sodium lauryl sulfate and 3g of hydrophilic modified nano-silica, put them into a jar, add 97.25g of water, and place them in a constant temperature water bath at 60°C for preheating Stir and mix for 1 hour, then pass nitrogen gas at a low speed to form a uniform foam; then add 2g of potassium persulfate and 0.75g of isopropanol into the jar, add 2.75g of water, seal it and react at 60°C until the reaction is complete (ie The viscosity of the product rises to the shape of an immobile rubber sheet), and then it is taken out, cooled to room temperature, and the reaction is stopped; the product is taken out and placed in an oven, dried at 35°C for 72 hours, crushed and sieved to obtain different particles of 1-3mm, 5-8mm, etc. The honeycomb-shaped light yellow solid granular temporary plugging a...

Embodiment 2

[0033] Example 2 Preparation of temporary plugging agent between honeycomb seams and evaluation of its performance

[0034] Get 46g acrylamide, 45g natural polyurethane, 2g sodium lauryl sulfate and 3g hydrophilic modified nano-silica (compared with embodiment 1, increase polyacrylamide content, reduce natural polyurethane content), add wide mouth Add 96g of water to the bottle, place it in a constant temperature water bath at 60°C to preheat and stir for 1 hour, then blow nitrogen gas at a low speed to form a uniform foam; then add 3g of potassium persulfate and 1g of isopropanol into the jar, add 4g of water , sealed and reacted at 60°C; take it out after the reaction is complete (that is, the viscosity of the product rises to an immobile rubber sheet), cool to room temperature, and stop the reaction; take out the product and place it in an oven, dry it at 35°C for 72 hours, and crush it Sieve to obtain honeycomb-shaped light yellow solid granular temporary plugging agent pr...

Embodiment 3

[0045] Example 3 Preparation of honeycomb interstitial plugging agent and evaluation of its performance

[0046] Get 43.5g acrylamide, 50g natural polyurethane, 2g sodium lauryl sulfate and 3g hydrophilically modified nano silicon dioxide (compared with embodiment 1, improve natural polyurethane content, reduce polyacrylamide content), add wide Add 98.5g of water to the jar, place it in a constant temperature water bath at 60°C to preheat and mix for 1 hour, then blow nitrogen gas at a low speed to form a uniform foam; then add 1g of potassium persulfate and 0.5g of isopropanol into the jar , add 1.5g of water, seal and react at 60°C, take it out after the reaction is complete (that is, the viscosity of the product rises to an immobile rubber sheet), cool to room temperature, and stop the reaction; take out the product and place it in an oven, and dry it at 35°C for 72h , crushed and sieved to obtain honeycomb-shaped light yellow solid granular temporary plugging agent product...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a honeycomb temporary plugging agent for seams. The honeycomb temporary plugging agent is prepared from water and the following raw materials in percentage by weight: 43.5-46%of acrylamide monomer, 45-50% of natural polyurethane, 1-3% of a foaming agent sodium dodecyl sulfate, 1-5% of hydrophilically modified nano silica particles, 1-3% of potassium persulfate and 0.5-1% of isopropanol. The preparation method comprises the following steps: (1) taking the acrylamide monomer, natural polyurethane, the foaming agent and nano silica particles, adding water of equal mass, carrying out premixing, and introducing nitrogen gas to obtain a foam system; (2) adding potassium persulfate and isopropanol, adding water of equal mass, and carrying out a reaction until the viscosity of the product rises to a situation that the product becomes a non-flowing glue plate to obtain a honeycomb glue-plate product; and (3) carrying out drying and crushing to obtain the product. The honeycomb temporary plugging agent for seams has high dissolution rate in water and lower density while maintaining a high pressure bearing capacity.

Description

technical field [0001] The invention relates to a honeycomb interstitial interstitial plugging agent for high-temperature formation fracturing and a preparation method thereof, belonging to the field of oilfield chemical industry. Background technique [0002] With the continuous development of oil and gas resources in my country, the geological conditions of reservoirs are becoming more and more complex, and the difficulty of exploitation is also increasing. In recent years, for strongly heterogeneous, low-permeability, and ultra-low-permeability reservoirs, in order to further improve the stimulation efficiency and achieve uniform stimulation, the temporary plugging and steering technology has been proposed, which is to add temporary plugging and steering in real time during the hydraulic fracturing process. It can temporarily plug the artificial fractures that have been formed, force the fractures to crack and expand in other directions, and open new fractures under high ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/508C09K8/514C08F120/56
CPCC08F120/56C09K8/5083C09K8/514
Inventor 张潦源黄波陈勇张子麟于法珍卢娜娜左家强李潇菲王华
Owner CHINA PETROLEUM & CHEM CORP