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Swelling particle heterogeneous crack plugging effect improver and preparation method thereof

A body-expanding granule and heterogeneous technology, applied in the field of volume-expanding granule non-homogeneous crack plugging effect improver and preparation field, to achieve the effect of breakthrough pressure gradient increase and plugging effect improvement

Active Publication Date: 2020-11-27
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides an improving agent and a preparation method that can greatly improve the effect of body-expanding particles in heterogeneous crack plugging in order to solve the problems existing in the existing body-expanding particles in crack plugging water

Method used

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  • Swelling particle heterogeneous crack plugging effect improver and preparation method thereof
  • Swelling particle heterogeneous crack plugging effect improver and preparation method thereof
  • Swelling particle heterogeneous crack plugging effect improver and preparation method thereof

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preparation example Construction

[0033] A preparation method of a volume-expanding particle heterogeneous crack plugging effect improving agent, comprising the following steps:

[0034] Step 1: Prepare coupling agent modified matrix particles;

[0035] Step 2: Grinding the coating resin into powder and preheating, while preheating the coupling agent modified matrix particles obtained in step 1;

[0036] Step 3: Mix the lubricant, the coating resin in step 2, and the modified matrix particles of the coupling agent evenly, and heat at 120-180°C; take out the mixture every t time during the heating process, stir evenly and continue heating , After 0.5-1h, the desired modifier can be obtained.

[0037] The preparation process of the coupling agent modified matrix particles in step 1 is as follows:

[0038] S11: Mix the coupling agent, water and alcohol evenly under the condition of pH = 4-9, and react for 1-2 hours to obtain a coupling agent hydrolyzate;

[0039] S12: mix and react the matrix particles and the...

Embodiment 1

[0045] According to the following steps, the volume-expanding particle heterogeneous crack plugging effect improving agent is prepared;

[0046]Step 1: At room temperature, mix 6mL of γ-aminopropyltriethoxysilane, 4ml of water and 40ml of ethanol at pH = 9.0 and react for 2 hours to obtain a coupling agent hydrolyzate; 50g of The volcanic stone balls and 25g coupling agent hydrolyzate were mixed and reacted at room temperature for 2 hours; then the volcanic stone balls were filtered and placed in an oven at 60°C for 5 hours to obtain the coupling agent modified matrix particles.

[0047] Step 2: Grind 15g of terpene phenolic resin into powder and preheat at 40°C for 10min, meanwhile preheat 84.6g of coupling agent-modified matrix particles at 130°C for 10min.

[0048] Step 3: Mix the preheated terpene phenolic resin powder, coupling agent modified matrix particles and 0.4g calcium stearate evenly, and place in a constant temperature oven at 170°C for heating; remove the mixtur...

Embodiment 2

[0062] According to the following steps, the volume-expanding particle heterogeneous crack plugging effect improver is prepared:

[0063] Step 1: At room temperature, mix 5mL of γ-(2,3-glycidoxy)propyltrimethoxysilane, 40ml of water and 5ml of methanol at pH = 4.0 and react for 2 hours to obtain the hydrolyzed coupling agent solution; 50g of medical stone balls with an average particle size of 1mm and 20g of coupling agent hydrolyzate were mixed and reacted for 2h at room temperature; then the medical stone balls were filtered and dried in an oven at 60°C for 5h to obtain the coupling agent Linking agent modified matrix particles.

[0064] Step 2: Grind 10 g of solid epoxy resin into powder and preheat at 40° C. for 10 minutes, and at the same time preheat 89.5 g of coupling agent-modified matrix particles at 100° C. for 10 minutes.

[0065] Step 3: Mix the preheated solid epoxy resin powder, coupling agent modified matrix particles and 0.5g calcium stearate evenly, and place...

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Abstract

The invention discloses a swelling particle heterogeneous crack plugging effect improver and a preparation method thereof. The swelling particle heterogeneous crack plugging effect improver comprisesthe following components in percentage by mass: 79-94.9% of coupling agent modified matrix particles, 5-20% of coated resin and 0.1-1% of a lubricant, the preparation method comprises the following steps: step 1, preparing the coupling agent modified matrix particles; step 2, grinding film-coated resin into powder, and preheating the powder and the coupling agent modified matrix particles obtainedin the step 1 respectively; and step 3, uniformly mixing a lubricating agent, the coated resin in the step 2 and the coupling agent modified matrix particles, and heating at 120-180 DEG C; in the heating process, taking a mixture out every t time, continuously heating after uniform stirring, and obtaining the required improver after 0.5-1 h. The improver is convenient to use and ingenious in action mechanism, no other matched agent is needed, and the heterogeneous crack plugging effect of the volume expansion particles can be improved only through the scouring action of stratum high temperature and produced water.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to an agent for improving the plugging effect of bulky particle heterogeneity cracks and a preparation method thereof. Background technique [0002] Fractured oil reservoirs account for more than 50% of the world's proven oil reserves, and are an important source of global energy supply. However, fractured reservoirs usually have strong heterogeneity, and wide fractures, as the main channel for oil-water flow, can easily shield narrow fractures and oil-water flow in the matrix. As a result, the volume of water flooding in the reservoir is small, the water channeling is obvious, and the oil recovery rate is low. Therefore, the use of chemical plugging agents to increase the flow resistance in wide fractures, thereby enhancing the producing degree of narrow fractures and matrix, has become a powerful measure to control water, increase oil production, improve quality an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/504C09K8/508
CPCC09K8/5045C09K8/5086C09K2208/34
Inventor 孙琳唐浩然刘锐蒲万芬金发扬
Owner SOUTHWEST PETROLEUM UNIV
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