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Water plugging agent, preparation method and application thereof

A technology of water blocking agent and plasticizer, which is applied in chemical instruments and methods, earthwork drilling, wellbore/well parts, etc., and can solve the problems of complex synthesis process, high cost, and high residue content

Active Publication Date: 2020-10-20
陕西安诺瑞特石油科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a preparation of selective water shutoff agent for oil and gas wells, which solves the problems of simplification of functions, uncontrollable softening temperature and resistance to Poor temperature performance, high residue content after dissolution, large damage to the reservoir and other problems, as well as complex synthesis process, time-consuming, energy-consuming, high-cost problems; And the softening time is adjustable, and the gas or liquid fluid of hydrocarbons can be fully dissolved when encountering hydrocarbons in the formation

Method used

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  • Water plugging agent, preparation method and application thereof
  • Water plugging agent, preparation method and application thereof
  • Water plugging agent, preparation method and application thereof

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Embodiment 1

[0034] The present invention provides a synthesis scheme of a selective water shutoff agent for oil and gas wells used in 40°C reservoirs, including the following steps:

[0035]Step 1: Since the melting temperature of the oil-soluble resin is between 130-140°C, but burning may occur when the melting temperature is higher than 200°C, in order to shorten the melting time, save energy and ensure production safety, the 65 % of the oil-soluble resin is melted when heated to 180°C-200°C;

[0036] Step 2: After the oil-soluble resin is completely melted into a liquid state, add 25% plasticizer, stir evenly, and add 0.7% cross-linking agent under stirring conditions;

[0037] Step 3: In order to ensure that the cross-linking agent is fully mixed, fully reacted and saves energy consumption, the stirring reaction time is controlled between 30-50 minutes, which can be adjusted according to the actual production situation, and then add 4% softening point regulator and stir Uniform, in o...

Embodiment 2

[0045] A synthetic scheme of a selective water shutoff agent for oil and gas wells used in 150°C reservoirs, comprising the following steps:

[0046] Step 1: Since the melting temperature of the oil-soluble resin is between 130-140°C, but when the melting temperature is higher than 200°C, it may burn, so in order to shorten the melting time, save energy and ensure production safety, 90% The oil-soluble resin is melted when heated to 180°C-200°C;

[0047] Step 2: After the oil-soluble resin is completely melted, add 3% plasticizer, stir evenly, and add 1% crosslinking agent under stirring condition;

[0048] Step 3: In order to ensure that the cross-linking agent is fully mixed, fully reacted and saves energy consumption, the stirring reaction time is controlled between 40-70 minutes, which can be adjusted according to the actual production situation, and then 2% softening point regulator is added and stirred Uniform, in order to ensure that the system state has good fluidity ...

Embodiment 3

[0054] A method for preparing a selective water shutoff agent for oil and gas wells used in 100°C reservoirs, comprising the following steps:

[0055] Step 1: Since the melting temperature of the oil-soluble resin is between 130-140°C, but when the melting temperature is higher than 200°C, combustion may occur, so in order to shorten the melting time, save energy and ensure production safety, the 83 % of the oil-soluble resin is melted when heated to 180°C-200°C;

[0056] Step 2: After the oil-soluble resin is completely melted, add 8% plasticizer, stir evenly, and add 0.7% crosslinking agent under stirring condition;

[0057] Step 3: In order to ensure that the cross-linking agent is fully mixed, fully reacted and energy-saving, the stirring reaction time is controlled between 40-70 minutes, which can be adjusted according to the actual production situation, and then add 4% softening point regulator, Stir evenly, in order to ensure that the system has good fluidity at this t...

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Abstract

The invention provides temporary plugging water, which is characterized by being prepared from, by mass, 65%-90% of oil-soluble resin, 2%-5% of industrial gelatin, 3%-25% of plasticizer, 2%-4% of softening point regulator, 0.5%-1.0% of cross-linking agent and 0.3% of dispersing agent. According to the invention, the selective temporary plugging water raw material for the oil-gas well does not contain inorganic solid-phase particles, so that damage to a stratum after temporary plugging water is dissolved is reduced; and the selective temporary plugging water for the oil-gas well is simple and safe in synthesis process, has high-temperature-resistant and salt-resistant capacity, can bear large construction pressure and has a good water plugging effect.

Description

technical field [0001] The invention relates to the technical field of oil and natural gas water plugging, temporary plugging and fracturing stimulation, in particular to a production preparation method and application of water plugging and temporary plugging, and belongs to the field of oil and gas field exploitation. Background technique [0002] With the gradual exploitation and depletion of petroleum resources, the oil production of oil wells decreases and the water production increases. In order to avoid this situation, additives such as water blocking and temporary plugging are usually used in the process of oil extraction. The product of the present invention also takes into account plugging Water and fracturing temporary plugging turn to two major functions. At present, there is a shale oil-guided volumetric fracturing water shutoff agent and its preparation method (Patent No.: CN110922950A) similar to this patent. The product described in this patent is composed of ...

Claims

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Application Information

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IPC IPC(8): C09K8/512E21B33/13
CPCC09K8/512E21B33/13
Inventor 杨立君贾振福秦鹏杨潘辛鹏王愉屈川蒋佳雪
Owner 陕西安诺瑞特石油科技有限公司
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