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CN-117801796-B - Anti-high Wen Dulou agent and preparation method thereof

CN117801796BCN 117801796 BCN117801796 BCN 117801796BCN-117801796-B

Abstract

The invention provides an anti-high Wen Dulou agent and a preparation method thereof, wherein the plugging agent is prepared by mixing a plurality of raw materials, the raw materials comprise a resin matrix and mineral powder filler, and based on 100 parts by weight of the plugging agent, the resin matrix is 55-75 parts by weight, and the mineral powder filler is 25-45 parts by weight. The method is that after the base materials are mixed at normal temperature and then are formed by high temperature hot pressing, the high-temperature resistant Wen Dulou agent is obtained by granulating at normal temperature. The density of the plugging agent is 1.4-2.2 g/cm 3 , the plugging agent is easy to suspend in the plugging slurry, the difficulty in preparing the plugging slurry can be reduced, the preparation method is simple and convenient, the source of the basic material is wide, the temperature resistance of the prepared plugging agent is more than or equal to 150 ℃, and the compressive strength is more than or equal to 30MPa.

Inventors

  • XIE XIANTAO
  • Qian Sibei
  • ZHOU HUAAN
  • LIANG HAO
  • HE TAO
  • XIA YUHAO
  • ZHAO ZHENGGUO
  • LIU ZHIMIN
  • HE JIN
  • HAI BO

Assignees

  • 中国石油天然气集团有限公司
  • 中国石油集团川庆钻探工程有限公司

Dates

Publication Date
20260508
Application Date
20231228

Claims (8)

  1. 1. The high Wen Du leakage-resistant agent is characterized by being prepared by mixing a plurality of raw materials, wherein the raw materials comprise a resin matrix and mineral powder filler; based on 100 parts by weight of the plugging agent, 55-75 parts by weight of the resin matrix and 25-45 parts by weight of the mineral powder filler; the resin matrix is prepared by compounding melamine resin and epoxy resin in a mass ratio of 50-90:10-50; the mineral powder filler comprises a combination of quartz powder and superfine calcium carbonate, and the compounding ratio of the quartz powder to the superfine calcium carbonate is 50-75:25-50.
  2. 2. The plugging agent of claim 1, wherein the mineral powder filler has a particle size of 40-100 μm.
  3. 3. A method for preparing an anti-high Wen Dulou agent, wherein the plugging agent is the plugging agent according to any one of claims 1 to 2, the method comprising the steps of: mixing the resin matrix and the mineral powder filler at one time under stirring to form a mixture; hot-press molding the mixture at 180-200 ℃ to obtain a plugging agent base material; And granulating the plugging agent base material to obtain the high-temperature-resistant plugging agent.
  4. 4. The method according to claim 3, wherein the stirring speed is 50 to 100 rpm and the stirring time is 30 to 45 minutes.
  5. 5. The method according to claim 3, wherein the hot pressing time is 15 to 30 minutes.
  6. 6. The method according to claim 3, wherein the hot pressing conditions further comprise a hot pressing pressure of 10 to 30mpa.
  7. 7. A method of manufacture according to claim 3, wherein the granulating is carried out using a granulator comprising a hammer, jaw or roller crusher.
  8. 8. The method according to claim 3, wherein the density of the high-temperature-resistant plugging agent is 1.4-2.2 g/cm 3 , the compressive strength is not less than 30MPa, and the temperature resistance is not less than 150 ℃.

Description

Anti-high Wen Dulou agent and preparation method thereof Technical Field The invention relates to the field of oil and gas drilling engineering, in particular to an anti-high Wen Dulou agent and a preparation method thereof. Background As oil and gas drilling advances to deeper and more complex zones and formations, the drilling encounters formation pressure systems become increasingly complex. When the stratum of different pressure systems is lost circulation, the density of the plugging drilling fluid matched with the stratum is needed. When preparing the plugging slurry with different densities, the plugging material matched with the density is needed to be selected. At present, the natural rigid plugging material is most applied by mineral particles and plant shell particles, wherein the density of the mineral plugging material such as calcite particles is about 2.6g/cm 3, and the density of the shell plugging material such as walnut shells is about 1.2g/cm 3. When the density of the plugging base slurry is low, the system is easy to subside due to the introduction of the mineral rigid plugging agent, the plugging effect is seriously affected, the viscosity and the shearing force of the base slurry are often improved in order to improve the settling stability of the mineral rigid plugging agent on site, but the preparation difficulty of the plugging slurry is increased, the pumping is difficult, and when the density of the plugging base slurry is high, the plant shell plugging agent is extremely easy to float, and the plugging application effect is affected. Patent literature 'an organic synthetic plugging particle for well drilling and a preparation method thereof' discloses a preparation method of the organic synthetic plugging particle. The plugging particles are formed by blending one or more of calcium carbonate whiskers, magnesium borate whiskers and calcium sulfate whiskers with polyether-ether-ketone and polyether-imide. The preparation method adopts the modes of mixing, melting, extruding, cooling, drying and granulating at the high temperature of 380 ℃. The technical scheme has the defects that (1) the preparation method is complex, special high-temperature mixing and dissolving equipment with the temperature of more than 380 ℃ is needed, the energy consumption is high, the operation is difficult, 2) the resin material is polyether ether ketone and polyetherimide, the filler is one or more of calcium carbonate whisker, magnesium borate whisker and calcium phobic whisker, the source of the basic material is scarce, the cost is high, 3, the temperature resistance of the prepared plugging particle product is only 120 ℃, and the requirement of high-temperature deep well plugging with the underground temperature of more than 150 ℃ on the temperature resistance of rigid particles cannot be met. At present, a high-strength medium-density (1.4-2.2 g/cm 3) rigid plugging agent with the temperature resistance of more than or equal to 150 ℃ is lacking. Therefore, research on the plugging agent with medium density, high strength and high temperature resistance has important application value. Disclosure of Invention The present invention aims to address at least one of the above-mentioned deficiencies of the prior art. For example, one of the purposes of the invention is to solve the problems of the existing particle plugging agent that the density is too high and easy to precipitate and the density is too low and easy to float, the other purpose of the invention is to solve the defects of the existing particle plugging agent that the medium-strength plugging strength is insufficient and the temperature resistance is low, and the third purpose of the invention is to provide the improved configuration efficiency of the plugging slurry. In order to achieve the above purpose, according to one aspect of the present invention, there is provided an anti-high Wen Dulou agent, wherein the plugging agent is formed by mixing a plurality of raw materials, the raw materials include a resin matrix and a mineral powder filler; Based on 100 parts by weight of the plugging agent, 55-75 parts by weight of the resin matrix and 25-45 parts by weight of the mineral powder filler are adopted. Optionally, the resin matrix is compounded by melamine resin and epoxy resin with the mass ratio of 50-90:10-50. Alternatively, the mineral powder filler comprises a combination of quartz powder and ultra-fine calcium carbonate. Optionally, the particle size of the mineral powder filler is 40-100 μm. The invention also provides a preparation method of the anti-high Wen Dulou agent, wherein the plugging agent is the plugging agent, and the method comprises the following steps: mixing the resin matrix and the mineral powder filler at one time under stirring to form a mixture; hot-press molding the mixture at 180-200 ℃ to obtain a plugging agent base material; And granulating the plugging agent base material to obtain the high-temperature-r