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Preparation method of carboxymethyl cellulose modified profile control water plugging agent

A technology of carboxymethyl cellulose and profile control water shutoff agent, which is applied in the preparation of carboxymethyl cellulose modified profile control water shutoff agent and the preparation field of profile control water shutoff agent, which can solve the problem of poor durability and plugging time Short, profile control water shutoff agent expansion rate decline and other issues, to achieve good durability, long plugging time effect

Active Publication Date: 2020-11-10
山东达源环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To sum up, the existing profile control water shutoff agents mainly have the following main defects: under the condition of high pressure, the profile control water shutoff agent (1) the expansion ratio drops significantly; (2) the compressive strength decreases; (3) The blocking time is short and the durability is poor, resulting in poor blocking effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1 A kind of preparation method of carboxymethyl cellulose modified profile control water blocking agent

[0046] The preparation method of a carboxymethyl cellulose modified profile control water blocking agent of the present invention, its technical scheme is: comprising raw material preparation, modified carboxymethyl cellulose preparation, clarification solution preparation, gel preparation, mixed dehydration, Specifically include the following steps:

[0047] (1) Raw material preparation

[0048] A carboxymethyl cellulose modified profile control water blocking agent of the present invention, raw materials include: carboxymethyl cellulose, emulsifier, crosslinking agent, ethylene bis stearic acid amide, glycerin triacrylate, initiator, Aqueous sodium silicate solution, magnesium chloride, cyclohexane, strontium chloride, highly viscous protein solution, sodium bicarbonate.

[0049] In this embodiment, the raw materials include by weight: 120 parts of ca...

Embodiment 2

[0063] Embodiment 2 A kind of preparation method of carboxymethyl cellulose modified profile control water blocking agent

[0064] A carboxymethyl cellulose modified profile control water blocking agent of the present invention, raw materials include: carboxymethyl cellulose, emulsifier, crosslinking agent, ethylene bis stearic acid amide, glycerin triacrylate, initiator, Aqueous sodium silicate solution, magnesium chloride, cyclohexane, strontium chloride, highly viscous protein solution, sodium bicarbonate.

[0065] In this embodiment, the raw materials include: 135 parts by weight of carboxymethyl cellulose, 17 parts of emulsifier, 6 parts of crosslinking agent, 25 parts of ethylene bis stearic acid amide, 20 parts of glycerol triacrylate, initiator 10 parts, 72 parts of sodium silicate aqueous solution, 6 parts of magnesium chloride, 0.5 parts of strontium chloride, 42 parts of high-viscosity protein solution, 0.5 parts of sodium bicarbonate, and 10 parts of cyclohexane. ...

Embodiment 3

[0079] Embodiment 3 A kind of preparation method of carboxymethyl cellulose modified profile control water blocking agent

[0080] A carboxymethyl cellulose modified profile control water blocking agent of the present invention, raw materials include: carboxymethyl cellulose, emulsifier, crosslinking agent, ethylene bis stearic acid amide, glycerin triacrylate, initiator, Aqueous sodium silicate solution, magnesium chloride, cyclohexane, strontium chloride, highly viscous protein solution, sodium bicarbonate.

[0081] In this embodiment, the raw materials include by weight: 150 parts of carboxymethyl cellulose, 15 parts of emulsifier, 9 parts of crosslinking agent, 20 parts of ethylene bis stearic acid amide, 25 parts of glycerol triacrylate, initiator 5 parts, 80 parts of sodium silicate aqueous solution, 5 parts of magnesium chloride, 5 parts of strontium chloride, 35 parts of high viscosity protein solution, 3 parts of sodium bicarbonate, and 5 parts of cyclohexane.

[008...

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Abstract

The invention provides a preparation method of a carboxymethyl cellulose modified profile control water plugging agent, which comprises the following steps: raw material preparation, modified carboxymethyl cellulose preparation, clarified solution preparation, gel preparation, and mixing dehydration. The modified carboxymethyl cellulose preparation comprises adding an emulsifier into carboxymethylcellulose, stirring for 12-15 minutes at a stirring speed of 1,200-1,500 rmp / min, adding magnesium chloride, stirring for 30 minutes at the stirring speed of 2,000-2,500 rmp / min, heating to 65-80 DEGC, and increasing the rotating speed. The carboxymethyl cellulose modified profile control water plugging agent is good in durability and long in plugging time, the 24-hour compressive strength is 15.3-20.0 MPa, the expansion ratio maintenance rate under high pressure is 97.8-99.4%, and the technical problem that the expansion ratio and strength of an existing profile control water plugging agentunder a high-pressure oil well are obviously reduced is solved.

Description

technical field [0001] The invention belongs to the technical field of oilfield exploitation, and relates to a preparation method of a profile control and water shutoff agent, in particular to a preparation method of a carboxymethyl cellulose modified profile control and water shutoff agent. Background technique [0002] As we all know, with the exploitation and extensive use of oil and natural gas and the development of the automobile industry, the non-renewability of oil and other resources has attracted increasing attention, and the development and utilization of new energy has attracted increasing attention. In oil and gas field development projects, profile control and water shutoff technology is an important means and measure to enhance oil recovery. The profile control and water shutoff technology has gradually developed from the single oil well water shutoff stage, the water well single well profile control stage, the oil and water wells of the well group correspondi...

Claims

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Application Information

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IPC IPC(8): C09K8/514C09K8/512C09K8/90C09K8/88C08B11/20C08B11/12C08L1/28C08J3/075
CPCC09K8/514C09K8/512C09K8/5083C09K8/905C09K8/887C09K8/882C08B11/20C08B11/12C08J3/075C08J2301/28
Inventor 严希海严谨万丽萍
Owner 山东达源环保工程有限公司