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Thickened oil thermal recovery channeling sealing agent, channeling sealing agent thick liquid, preparation method of thick liquid and thickened oil thermal recovery profile control channeling sealing method

A technology of heavy oil thermal recovery and blocking agent, which is applied in chemical instruments and methods, production fluids, earth drilling and production, etc., can solve the problems of short blocking distance and system shrinkage of blocking agent, and achieve high plugging efficiency, Not easy to filter out and easy to operate

Active Publication Date: 2015-11-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a sealing agent for thermal recovery of heavy oil, so as to solve the problems of short blocking distance of the existing sealing agent and serious shrinkage of the system after solidification

Method used

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  • Thickened oil thermal recovery channeling sealing agent, channeling sealing agent thick liquid, preparation method of thick liquid and thickened oil thermal recovery profile control channeling sealing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The sealing agent for heavy oil thermal recovery of the present embodiment is composed of the following components in percentage by weight: 45% of sulphoaluminate gelling agent, 40% of perlite floating beads, 0.7% of suspending agent, 14% of stabilizer, retarder Agent 0.3%. The suspending agent is hydroxymethyl cellulose, the stabilizer is microsilica, and the retarder is boric acid.

[0030] The heavy oil thermal recovery sealing channeling agent slurry of this embodiment is made of the channeling sealing agent of this embodiment and water, and the water-cement ratio is 3. In this embodiment, the density of the heavy oil thermal recovery sealing agent slurry is 1.05g / cm 3 .

[0031] The preparation method of the channel blocking agent slurry in this embodiment, the specific operation method is: add retarder, suspending agent and stabilizer in the water of 50wt% formula amount, and then add sulfoaluminate gelation under constant stirring agent, perlite floating beads...

Embodiment 2～5

[0036] Examples 2-5 The types and weight percentages of each component in the thermal recovery sealing agent for heavy oil are shown in Table 1 below:

[0037] Table 1 Example 2-5 The formula composition of thermal recovery sealing agent for heavy oil

[0038]

[0039] Examples 2-5 Sealing agent for thermal recovery of heavy oil Add a certain amount of water to prepare channeling agent slurry under the condition of water-cement ratio 3-4.5, the amount of water added, water-cement ratio and slurry density are shown in Table 2 below:

[0040] Table 2 Relevant parameters of heavy oil thermal recovery sealing channeling agent slurry in Examples 2-5

[0041] project

Example 2

Example 3

Example 4

Example 5

Water cement ratio

4.0

3.5

4.5

4.2

Slurry density (g / cm 3 )

1.06

1.08

1.1

1.09

[0042] Examples 2-5 The preparation method of the channeling agent slurry is basically the same as that of Example ...

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Abstract

The invention discloses a thickened oil thermal recovery channeling sealing agent, a channeling sealing agent thick liquid, a preparation method of the thick liquid and a thickened oil thermal recovery profile control channeling sealing method, and belongs to the technical field of oilfield chemistry and oil exploitation engineering. The oil exploitation comprises components in percentage by weight as follows: 45%-65% of a sulphoaluminate gelling agent, 16%-40% of perlite floating beads, 0.5-0.7% of a suspending agent, 14%-18% of a stabilizer and 0.3%-0.5% of a retarder. Water is added to the channeling sealing agent to form the thick liquid, and the water-ash ratio is controlled to be 3-4.5 in the preparation process. The density of the channeling sealing agent thick liquid is low and ranges from 1.05 g / cm<3> to 1.1 g / cm<3>, the thick liquid can permeate to a steam channeling passageway in the deep position of the ground stratum and is cured for 4-12 hours at the temperature ranging from 30 DEG C to 100 DEG C, a cured product can resist high-temperature steam at the temperature of 300 DEG C, the blocking effect is good, the steam channeling problem of the middle lower part of an oil reservoir can be solved, and a better blocking effect is realized on channeling sealing of the overlapping layer of steam of a thick oil layer.

Description

technical field [0001] The invention belongs to the technical field of oil field chemistry and petroleum exploitation engineering, and in particular relates to a channeling sealing agent for thermal recovery of heavy oil, a channeling sealing agent slurry and a preparation method thereof, and also relates to a channeling sealing method for profile control of heavy oil thermal recovery. Background technique [0002] Heavy oil is a kind of petroleum with high viscosity and poor fluidity, which is difficult to extract and needs to be reduced in viscosity to facilitate extraction. The thermal recovery of heavy oil is the main technical means of heavy oil development. The thermal recovery technology of heavy oil mainly includes steam huff and puff, steam flooding, burning oil layers, etc. Steam huff and puff or steam flooding are the main technical means of heavy oil development at present. Inject high-temperature steam at 200-300°C into the medium, and use the heat of the steam ...

Claims

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Application Information

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IPC IPC(8): C09K8/50C09K8/508C09K8/514E21B43/22
CPCC09K8/50C09K8/5083C09K8/514E21B43/16
Inventor 孙迎胜王孟江李飞鹏常国栋王晓东王新亮
Owner CHINA PETROLEUM & CHEM CORP
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