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

Polymer with water plugging profile control performance, preparation method and application thereof

A technology for water plugging and profile control and polymer, which is applied to drilling compositions, chemical instruments and methods, etc., and can solve the problem of short action distance of water plugging and profile control agents, chromatographic separation, and gelation reactivity of water plugging and profile control agents. Uncontrollable and other problems, to achieve the effect of aging retention and high viscosity

Active Publication Date: 2020-04-07
CHINA PETROLEUM & CHEM CORP +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are two main problems in the existing water plugging profile control agents: 1. The action distance of the water plugging profile control agent is short, and it is only effective in the near wellbore area; 2. The gelling reactivity of the water plugging profile control agent is uncontrollable, which often causes Blockage near the wellbore; 3. Most of the water plugging and profile control agents are multiple agents, that is, A and B agent systems. Chromatographic separation will occur during the formation migration process, and at the same time, it will cause uncertainty in the construction design of water plugging and profile control measures

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polymer with water plugging profile control performance, preparation method and application thereof
  • Polymer with water plugging profile control performance, preparation method and application thereof
  • Polymer with water plugging profile control performance, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] In a second aspect, the present invention provides a method for preparing a polymer with water shutoff and profile control properties, wherein the method includes: in the presence of an initiator and water as a solvent, and under an inert gas atmosphere, make a single Body D, monomer E and monomer F carry out solution polymerization; Wherein, the monomer D is an acrylamide monomer, and the monomer E is 2-acrylamido-2-methylpropanesulfonic acid (AMPS) monomer, the monomer F is a monomer having a structure shown in formula (1); wherein, the amount of the monomer D, the monomer E and the monomer F is such that in the prepared polymer, the amount of the structural unit A The content is 60-98% by weight, the content of structural unit B is 1-39% by weight, and the content of structural unit C is 1-39% by weight;

[0033]

[0034] Among them, in formula (1), R 1 , R 2 , R 3 Each is independently H, C1-C12 alkyl, C6-C12 substituted or unsubstituted aryl; R 4 C1-C12 alky...

specific Embodiment approach

[0049] According to a preferred embodiment of the present invention, the preparation method of the polymer with water shutoff and profile control properties comprises the following steps:

[0050] Step 1: Add monomer D, monomer E and monomer F to the polymerization reactor to prepare an aqueous solution, adjust the pH value of the aqueous solution to 8-10 with alkali, and pass nitrogen gas for 5-60 minutes to remove it of oxygen;

[0051] Step 2: Add an initiator to the aqueous solution in Step 1 and mix evenly, stop feeding nitrogen gas and seal it, and polymerize for 5-10 hours to obtain a colloidal polymer aqueous solution; wherein, when the initiator is azo When the initiator is a redox type initiator, the temperature of the polymerization reaction is 40-70°C; when the initiator is a redox type initiator, the temperature of the polymerization reaction is 15-30°C;

[0052] Step 3: Take out the colloid and then granulate, dry, pulverize and sieve to obtain the polymer produ...

Embodiment 1

[0062] This example is used to illustrate the polymer with water shutoff and profile control properties provided by the present invention and its preparation method

[0063] (1) 225 parts by mass of acrylamide (AM), 50 parts of 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and 12.5 parts of acrylamide shown in formula (2) The methyl ester compound was dissolved in 1000 parts of water under stirring, the pH value of the solution was adjusted to 9.2 with sodium hydroxide, and at room temperature, the aqueous solution was purged with nitrogen for 30 minutes.

[0064]

[0065] (2) Add 0.02 parts of initiator 2,2-azobis(2-methylpropionamidine) hydrochloride (AIBA), stop feeding nitrogen at the same time, and react at a constant temperature of 50°C under airtight conditions for 6 hours, A gummy polymer solution product was obtained.

[0066] (3) The product is dried, granulated, pulverized, and sieved to obtain the polymer A1 with water shutoff and profile control properties of...

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

No PUM Login to View More

Abstract

The invention discloses a polymer with water plugging and profile control performance, and a preparation method and application thereof, belonging to the field of water plugging and profile control ofoil fields. The polymer contains a constitutional unit A, a constitutional unit B and a constitutional unit C, wherein the constitutional unit A is provided by an acrylamide monomer, the constitutional unit B is provided by a 2-acrylamido-2-methylpropanesulfonic acid monomer, and the constitutional unit C is provided by a monomer with a structure as shown in a formula (1) which is described in the specification. On the basis of the weight of the polymer, the contents of the constitutional unit A, the constitutional unit B and the constitutional unit C are 60 to 98 wt%, 1 to 39 wt%, and 1 to 39 wt%, respectively. In the formula (1), R1, R2 and R3 are independently selected from a group consisting of H, C1-12 alkyl groups and C6-12 substituted or unsubstituted aryl groups; and R4 is selected from a group consisting of C1-12 alkyl groups, C6-12 substituted or unsubstituted cycloalkyl groups, and C6-12 substituted or unsubstituted aryl groups.

Description

technical field [0001] The invention relates to the field of crude oil recovery, in particular, to a polymer with water shutoff and profile control performance, a method for preparing a polymer with water shutoff and profile control performance, and a polymer with water shutoff and profile control prepared by the method. The application of polymers with high performance and polymers with water plugging and profile control properties in water plugging and profile control and in the preparation of products for water plugging and profile control. Background technique [0002] More than 80% of my country's onshore oil is developed by water injection. A reservoir often consists of multiple oil layers. Due to the difference in permeability of each oil layer, the injected water will rush along the high permeability layer, resulting in premature water cover of the oil well. Therefore, for oilfield oil wells developed by water flooding, water production is a common problem. The ma...

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): C08F220/56C08F220/58C09K8/508
CPCC08F220/56C09K8/5083C08F220/585C08F220/58
Inventor 祝纶宇胡晓娜刘希伊卓张文龙杜超方昭
Owner CHINA PETROLEUM & CHEM CORP