CN118126693B - Broad-spectrum plugging agent with microscopic polymorphic particle size - Google Patents
Broad-spectrum plugging agent with microscopic polymorphic particle size Download PDFInfo
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- CN118126693B CN118126693B CN202410565630.7A CN202410565630A CN118126693B CN 118126693 B CN118126693 B CN 118126693B CN 202410565630 A CN202410565630 A CN 202410565630A CN 118126693 B CN118126693 B CN 118126693B
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- 239000002245 particle Substances 0.000 title claims abstract description 189
- 239000000843 powder Substances 0.000 claims abstract description 215
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 122
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 61
- 239000010426 asphalt Substances 0.000 claims abstract description 54
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000010445 mica Substances 0.000 claims abstract description 45
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 45
- 239000010425 asbestos Substances 0.000 claims abstract description 43
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 43
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 35
- 239000004113 Sepiolite Substances 0.000 claims abstract description 33
- 229910052624 sepiolite Inorganic materials 0.000 claims abstract description 33
- 235000019355 sepiolite Nutrition 0.000 claims abstract description 33
- 239000002023 wood Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000002981 blocking agent Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 abstract description 19
- 238000005553 drilling Methods 0.000 abstract description 11
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 12
- 239000002002 slurry Substances 0.000 description 11
- 239000004576 sand Substances 0.000 description 10
- 238000001514 detection method Methods 0.000 description 9
- 239000012530 fluid Substances 0.000 description 9
- 238000002156 mixing Methods 0.000 description 7
- 239000000377 silicon dioxide Substances 0.000 description 7
- 235000013339 cereals Nutrition 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000440 bentonite Substances 0.000 description 4
- 229910000278 bentonite Inorganic materials 0.000 description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 241000276425 Xiphophorus maculatus Species 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002902 bimodal effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000001493 electron microscopy Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- -1 flakes Substances 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention provides a plugging agent with microscopic polymorphic particle size and broad spectrum, and relates to the technical field of petroleum drilling. The plugging agent comprises the following raw materials: 8-15 wt% of silicon dioxide powder; 20-25wt% of calcium carbonate powder; 0-5wt% of diatomite; 17-21 wt% of asbestos powder; 5-20wt% of wood powder; 1-3wt% of sepiolite powder; 0-16wt% of graphite powder; 8-16wt% of mica powder; 5-16wt% of asphalt powder; the particle sizes of the raw materials are 800 nm-1000 nm, 400-18000 meshes, 300 meshes, 400-1000 meshes, 800-1000 meshes, 400-1000 meshes, 600-1000 meshes and 400-600 meshes respectively. The invention fully plays the advantages of various bridging materials by matching the raw materials with different shapes and different particle diameters under the microcosmic condition, and has high plugging efficiency.
Description
Technical Field
The invention relates to the technical field of petroleum drilling, in particular to a plugging agent with microscopic polymorphic particle size and broad spectrum.
Background
Three common drilling fluid plugging technologies in domestic construction include a shielding temporary plugging technology, a low-permeability film-forming plugging technology and a bridging material plugging technology. The bridging material plugging technology is widely applied in practical construction although being more traditional, and the main reason is that the plugging method not only can effectively solve the problems of partial leakage and lost return caused by the hole and the crack in the well, but also has the advantages of easy buying, safe use, convenient operation and the like.
However, the following major problems remain for bridging materials during use:
① Because the fiber plugging material cannot form an effective hypotonic barrier layer on the well wall, the fiber plugging material does not have the capability of preventing the invasion of drilling fluid and the instability of the well bore when bridging on micro cracks;
② The condition for forming a mud cake barrier layer by using plugging materials with different sizes and gradations in a permeable stratum is to have enough instantaneous fluid loss. However, in actual conditions, the plugging material is difficult to form protective mud cakes due to low instantaneous fluid loss of micro-cracks in the well;
③ When the platy mica material is used, the platy mica material usually needs to be rapidly acted at high concentration to bridge at cracks so as to play a role in blocking. However, the increase of the concentration of the material in the drilling fluid can cause the equivalent density of the drilling fluid to be increased, so that the bottom hole pressure is further increased, and the fluid loss or leakage can be aggravated finally;
④ The best effect of the partial bridging material is not achieved due to the condition limitation when the bridging material is used, for example, asphalt, the temperature must reach the softening point temperature or higher when the bridging material is used, the strongest blocking effect can be exerted, but most stratum in actual construction cannot reach the temperature;
⑤ The common bridging plugging material has single multi-form and single particle size, and when in use, the plugging materials with different forms and different particle sizes need to be compounded together, so that the optimal plugging effect is difficult to be exerted.
Disclosure of Invention
The invention provides a micro-polymorphic broad-spectrum plugging agent with particle sizes, which solves the problems of the existing bridging materials in the use process, fully exerts the advantages of various bridging materials by matching raw materials with different shapes and different particle sizes under the micro-level, has high plugging efficiency and does not depend on the sizes of pores and cracks of a leakage layer.
The technical scheme adopted by the invention is as follows:
the broad-spectrum plugging agent with microscopic polymorphic grain size comprises the following raw materials in percentage by mass, wherein the sum of the mass percentages is 100 percent:
8-15 wt% of silicon dioxide powder;
20-25wt% of calcium carbonate powder;
Diatomite, 0-5wt%;
17-21 wt% of asbestos powder;
5-20wt% of wood powder;
Sepiolite powder, 1-3wt%;
0-16wt% of graphite powder;
8-16wt% of mica powder;
5-16wt% of asphalt powder;
Wherein the particle size of the silicon dioxide powder is 800 nm-1000 nm;
the particle size of the calcium carbonate powder is 400-18000 meshes;
the particle size of the diatomite is 300 meshes;
The particle size of the asbestos powder is 400-1000 meshes;
The particle size of the sepiolite powder is 800-1000 meshes;
the grain diameter of the wood powder is 1000 meshes;
The particle size of the graphite powder is 400-1000 meshes;
the particle size of the mica powder is 600-1000 meshes;
The particle size of the asphalt powder is 400-600 meshes.
Further, the calcium carbonate powder comprises calcium carbonate with a particle size of 400 meshes, calcium carbonate with a particle size of 1200 meshes, calcium carbonate with a particle size of 2000 meshes and calcium carbonate with a particle size of 800 nm-1000 nm, and the weight ratio of the calcium carbonate with a particle size of 400 meshes, the calcium carbonate with a particle size of 1200 meshes, the calcium carbonate with a particle size of 2000 meshes and the calcium carbonate with a particle size of 800 nm-1000 nm is 1: 1-3: 1-2: 0.1-1; or the calcium carbonate powder is calcium carbonate with the particle size of 400 meshes.
Further, the weight ratio of the calcium carbonate with the particle size of 400 meshes, the calcium carbonate with the particle size of 1200 meshes, the calcium carbonate with the particle size of 2000 meshes and the calcium carbonate with the particle size of 800-1000 nm is 1:2:2:0.5.
Further, the asbestos powder includes asbestos powder having a particle size of 400 mesh, asbestos powder having a particle size of 600 mesh and asbestos powder having a particle size of 1000 mesh, and the weight ratio of the asbestos powder having a particle size of 400 mesh, the asbestos powder having a particle size of 600 mesh and the asbestos powder having a particle size of 1000 mesh is 1:1:1, a step of; or the asbestos powder is all asbestos powder with the particle size of 600 meshes.
Further, the sepiolite powder comprises sepiolite powder with a particle size of 800 meshes and sepiolite powder with a particle size of 1000 meshes, and the weight ratio of the sepiolite powder with a particle size of 800 meshes to the sepiolite powder with a particle size of 1000 meshes is 1:1, a step of; or sepiolite powder with particle size of 1000 meshes.
Further, the graphite powder comprises 400 mesh graphite powder, 600 mesh graphite powder and 1000 mesh graphite powder, and the weight ratio of 400 mesh graphite powder, 600 mesh graphite powder and 1000 mesh graphite powder is 1:1:1, a step of; or the graphite powder is the graphite powder with the particle size of 600 meshes.
Further, the mica powder includes a mica powder having a particle size of 600 mesh, a mica powder having a particle size of 800 mesh and a mica powder having a particle size of 1000 mesh, and the weight ratio of the mica powder having a particle size of 600 mesh, the mica powder having a particle size of 800 mesh and the mica powder having a particle size of 1000 mesh is 1:2:2.5; or the mica powder is all the mica powder with the particle size of 800 meshes.
Further, the asphalt powder comprises asphalt powder with a softening point of 120 ℃ and asphalt powder with a softening point of 150 ℃, and the weight ratio of the asphalt powder with the softening point of 120 ℃ to the asphalt powder with the softening point of 150 ℃ is 1-2: 1.
Further, the weight ratio of the asphalt powder with a softening point of 120 ℃ to the asphalt powder with a softening point of 150 ℃ is 1:1.
The beneficial effects of the invention are as follows:
The invention designs a plugging agent with broad-spectrum microscopic polymorphic particle size, and rigid particle powder such as calcium carbonate, diatomite and the like play a bridging role at a leakage channel roar; the microstructure of asbestos powder, wood powder and the like is fibrous, plays a suspending role in plugging slurry and plays a mutual pulling role in formed plugs; the microstructure of graphite powder, mica powder and the like is in a flake shape; the asphalt powder is deformed and softened at a certain temperature, irregular pores and microcracks can be filled, the plugging is enhanced, and finally filtrate is prevented from entering the stratum. The plugging agent with the broad-spectrum microscopic polymorphic particle size fully exerts the advantages of various bridging materials by matching the raw materials with different shapes and different particle sizes under the microscopic condition, has high plugging efficiency and does not depend on the sizes of the pores and cracks of the leakage layer.
Drawings
FIG. 1 shows the results of laser particle size detection of a broad spectrum of micro-polymorphic particle sizes of the blocking agent of example 4.
FIG. 2 shows the results of laser particle size detection of a broad spectrum of micro-polymorphic particle sizes of the blocking agent of example 5.
FIG. 3 shows the results of laser particle size detection of a broad spectrum of micro-polymorphic particle sizes of the blocking agent of example 6.
FIG. 4 shows the results of laser particle size detection of a broad spectrum of micro-polymorphic particle sizes of the blocking agent of example 7.
FIG. 5 shows the results of laser particle size detection of a broad spectrum of micro-polymorphic particle sizes of the blocking agent of example 8.
FIG. 6 shows the 60-80 mesh sand bed test results corresponding to the base slurry.
FIG. 7 shows the 60-80 mesh sand bed test results corresponding to example 4.
FIG. 8 shows the 60-80 mesh sand bed test results corresponding to example 5.
FIG. 9 shows the 60-80 mesh sand bed test results corresponding to example 6.
FIG. 10 shows the 60-80 mesh sand bed test results corresponding to example 7.
FIG. 11 shows the 60-80 mesh sand bed test results corresponding to example 8.
FIG. 12 is a microscopic morphology observation chart of the blocking agent with a broad spectrum of microscopic polymorphic grain sizes in example 3.
Detailed Description
The broad-spectrum plugging agent with microscopic polymorphic grain size comprises the following raw materials in percentage by mass, wherein the sum of the mass percentages is 100 percent: 8-15 wt% of silicon dioxide powder; 20-25wt% of calcium carbonate powder; diatomite, 0-5wt%; 17-21 wt% of asbestos powder; 5-20wt% of wood powder; sepiolite powder, 1-3wt%; 0-16wt% of graphite powder; 8-16wt% of mica powder; 5-16wt% of asphalt powder; wherein the particle size of the silicon dioxide powder is 800 nm-1000 nm; the particle size of the calcium carbonate powder is 400-18000 meshes; the particle size of the diatomite is 300 meshes; the particle size of the asbestos powder is 400-1000 meshes; the particle size of the sepiolite powder is 800-1000 meshes; the grain diameter of the wood powder is 1000 meshes; the particle size of the graphite powder is 400-1000 meshes; the particle size of the mica powder is 600-1000 meshes; the particle size of the asphalt powder is 400-600 meshes.
Further, the calcium carbonate powder includes calcium carbonate having a particle size of 400 mesh, calcium carbonate having a particle size of 1200 mesh, calcium carbonate having a particle size of 2000 mesh and calcium carbonate having a particle size of 800nm to 1000nm (1000 nm corresponds to 18000 mesh), and the weight ratio of calcium carbonate having a particle size of 400 mesh, calcium carbonate having a particle size of 1200 mesh, calcium carbonate having a particle size of 2000 mesh and calcium carbonate having a particle size of 800nm to 1000nm is 1: 1-3: 1-2: 0.1-1; or the calcium carbonate powder is calcium carbonate with the particle size of 400 meshes.
Further, the weight ratio of the calcium carbonate with the particle size of 400 meshes, the calcium carbonate with the particle size of 1200 meshes, the calcium carbonate with the particle size of 2000 meshes and the calcium carbonate with the particle size of 800-1000 nm is 1:2:2:0.5.
Further, the asbestos powder includes asbestos powder having a particle size of 400 mesh, asbestos powder having a particle size of 600 mesh and asbestos powder having a particle size of 1000 mesh, and the weight ratio of the asbestos powder having a particle size of 400 mesh, the asbestos powder having a particle size of 600 mesh and the asbestos powder having a particle size of 1000 mesh is 1:1:1, a step of; or the asbestos powder is all asbestos powder with the particle size of 600 meshes.
Further, the sepiolite powder comprises sepiolite powder with a particle size of 800 meshes and sepiolite powder with a particle size of 1000 meshes, and the weight ratio of the sepiolite powder with a particle size of 800 meshes to the sepiolite powder with a particle size of 1000 meshes is 1:1, a step of; or sepiolite powder with particle size of 1000 meshes.
Further, the graphite powder comprises 400 mesh graphite powder, 600 mesh graphite powder and 1000 mesh graphite powder, and the weight ratio of 400 mesh graphite powder, 600 mesh graphite powder and 1000 mesh graphite powder is 1:1:1, a step of; or the graphite powder is the graphite powder with the particle size of 600 meshes.
Further, the mica powder includes a mica powder having a particle size of 600 mesh, a mica powder having a particle size of 800 mesh and a mica powder having a particle size of 1000 mesh, and the weight ratio of the mica powder having a particle size of 600 mesh, the mica powder having a particle size of 800 mesh and the mica powder having a particle size of 1000 mesh is 1:2:2.5; or the mica powder is all the mica powder with the particle size of 800 meshes.
Further, the asphalt powder comprises asphalt powder with a softening point of 120 ℃ and asphalt powder with a softening point of 150 ℃, and the weight ratio of the asphalt powder with the softening point of 120 ℃ to the asphalt powder with the softening point of 150 ℃ is 1-2: 1.
Further, the weight ratio of the asphalt powder with a softening point of 120 ℃ to the asphalt powder with a softening point of 150 ℃ is 1:1.
This is illustrated by the following more specific examples.
In example 1, 8wt% of silica powder (800 nm to 1000 nm), 20wt% of calcium carbonate powder (400 mesh: 1200 mesh: 2000 mesh: 800nm to 1000 nm=1:2:2:0.5), 1wt% of diatomite (300 mesh), 20wt% of asbestos powder (400 mesh: 600 mesh: 1000 mesh=1:1), 20wt% of wood flour (1000 mesh), 1wt% of sepiolite powder (800 mesh: 1000 mesh=1:1), 7wt% of graphite powder (400 mesh: 600 mesh: 1000 mesh=1:1:1), 8wt% of mica powder (600 mesh: 800 mesh: 1000 mesh=1:2:2.5) and 15wt% of asphalt powder (120 ℃ softening point asphalt powder: 150 ℃ softening point asphalt powder=1:1, and 400 mesh to 600 mesh of particle size after mixing) were uniformly mixed to obtain a broad-spectrum plugging agent with microscopic polymorphic particle size.
In example 2, 10wt% of silica powder (800 nm to 1000 nm), 25 wt% of calcium carbonate powder (400 mesh: 1200 mesh: 2000 mesh: 800nm to 1000 nm=1:3:1:0.1), 17 wt% of asbestos powder (400 mesh: 600 mesh: 1000 mesh=1:1), 5wt% of wood powder (1000 mesh), 3wt% of sepiolite powder (800 mesh: 1000 mesh=1:1), 16wt% of graphite powder (400 mesh: 600 mesh: 1000 mesh=1:1:1), 11wt% of mica powder (600 mesh: 800 mesh: 1000 mesh=1:2:2.5) and 13wt% of asphalt powder (120 ℃ softening point asphalt powder: 150 ℃ softening point asphalt powder=2:1), and the particle diameters after mixing are uniformly mixed, the plugging agent with broad spectrum of microscopic polymorphic particle diameters is obtained.
In example 3, 10wt% of silica powder, 20wt% of calcium carbonate powder (400 mesh: 1200 mesh: 2000 mesh: 800 nm-1000 nm=1:2:2:0.8), 3wt% of diatomite (300 mesh), 18wt% of asbestos powder (400 mesh: 600 mesh: 1000 mesh=1:1), 17wt% of wood flour (1000 mesh), 2wt% of sepiolite powder (800 mesh: 1000 mesh=1:1), 8wt% of graphite powder (400 mesh: 600 mesh: 1000 mesh=1:1:1), 8wt% of mica powder (600 mesh: 800 mesh: 1000 mesh=1:2:2.5) and 14wt% of asphalt powder (120 ℃ softening point asphalt powder: 150 ℃ softening point asphalt powder=1:1), and the particle diameters of 400 mesh-600 mesh were uniformly mixed to obtain a plugging agent with a broad spectrum of polymorphic particle diameters.
In example 4, 8wt% of silica powder (800 nm to 1000 nm), 20wt% of calcium carbonate powder (400 mesh: 1200 mesh: 2000 mesh: 800nm to 1000 nm=1:2:2:0.5), 3wt% of diatomite (300 mesh), 18wt% of asbestos powder (400 mesh: 600 mesh: 1000 mesh=1:1), 17wt% of wood powder (1000 mesh), 2wt% of sepiolite powder (800 mesh: 1000 mesh=1:1), 8wt% of graphite powder (400 mesh: 600 mesh: 1000 mesh=1:1), 8wt% of mica powder (800 mesh) and 16wt% of asphalt powder (120 ℃ softening point asphalt powder: 150 ℃ softening point asphalt powder=1:1, and 400 mesh to 600 mesh of mixed particle size) were uniformly mixed to obtain a broad-spectrum plugging agent with microscopic polymorphic particle size.
In example 5, 8wt% of silicon dioxide powder (800 nm-1000 nm), 20wt% of calcium carbonate powder (400 meshes), 3wt% of diatomite (300 meshes), 18wt% of asbestos powder (600 meshes), 17wt% of wood powder (1000 meshes), 2wt% of sepiolite powder (1000 meshes), 8wt% of graphite powder (600 meshes), 8wt% of mica powder (800 meshes) and 16wt% of asphalt powder (120 ℃ softening point asphalt powder: 150 ℃ softening point asphalt powder=1:1), and the particles with the particle size of 400 meshes-600 meshes) are taken, and uniformly mixed to obtain the plugging agent with broad-spectrum microscopic polymorphic particle size.
In example 6,15 wt% of silica powder (800 nm to 1000 nm), 20wt% of calcium carbonate powder (400 mesh: 1200 mesh: 2000 mesh: 800nm to 1000 nm=1:2:2:0.5), 3wt% of diatomite (300 mesh), 17wt% of asbestos powder (400 mesh: 600 mesh: 1000 mesh=1:1), 11wt% of wood powder (1000 mesh), 2wt% of sepiolite powder (800 mesh: 1000 mesh=1:1), 8wt% of graphite powder (400 mesh: 600 mesh: 1000 mesh=1:1), 8wt% of mica powder (600 mesh: 800 mesh: 1000 mesh=1:2:2.5) and 16wt% of asphalt powder (120 ℃ softening point asphalt powder: 150 ℃ softening point asphalt powder=1:1, and 400 mesh to 600 mesh of particle size after mixing) were uniformly mixed to obtain a broad-spectrum plugging agent with microscopic polymorphic particle size.
In example 7, 8wt% of silica powder (800 nm to 1000 nm), 20wt% of calcium carbonate powder (400 mesh: 1200 mesh: 2000 mesh: 800nm to 1000 nm=1:2:2:0.5), 3wt% of diatomite (300 mesh), 18wt% of asbestos powder (400 mesh: 600 mesh: 1000 mesh=1:1), 17wt% of wood powder (1000 mesh), 2wt% of sepiolite powder (800 mesh: 1000 mesh=1:1), 16wt% of mica powder (600 mesh: 800 mesh: 1000 mesh=1:2:2.5) and 16wt% of asphalt powder (120 ℃ softening point asphalt powder: 150 ℃ softening point asphalt powder=1:1, particle size after mixing is 400 mesh to 600 mesh), and the broad-spectrum plugging agent with microscopic multi-morphology particle size is obtained after uniform mixing.
In example 8, 8wt% of silica powder (800 nm to 1000 nm), 25wt% of calcium carbonate powder (400 mesh: 1200 mesh: 2000 mesh: 800nm to 1000 nm=1:2:2:0.5), 3wt% of diatomite (300 mesh), 21wt% of asbestos powder (400 mesh: 600 mesh: 1000 mesh=1:1), 20wt% of wood powder (1000 mesh), 2wt% of sepiolite powder (800 mesh: 1000 mesh=1:1), 8wt% of graphite powder (400 mesh: 600 mesh: 1000 mesh=1:1), 8wt% of mica powder (600 mesh: 800 mesh: 1000 mesh=1:2:2.5) and 5wt% of asphalt powder (120 ℃ softening point asphalt powder: 150 ℃ softening point asphalt powder=1:1, and 400 mesh to 600 mesh of particle size after mixing) were uniformly mixed to obtain a broad-spectrum plugging agent with microscopic polymorphic particle size.
The results of the detection of the broad-spectrum blocking agent of the microscopic polymorphic particle size in examples 1 to 8 are shown in the following table.
Particle size distribution (I)
The particle size of the sample was measured using a laser particle sizer in this example, and the measurement results are shown in table 1.
TABLE 1 particle size detection results
The results of the particle size test of the blocking agent in examples 4-8 are shown in FIGS. 1-5. As can be seen from table 1 and fig. 1 to 5, the plugging agent with broad particle size spectrum in microscopic multi-morphology prepared in this example has a wide particle size distribution, and the particle size range relates to nano-scale and micro-scale. And particle size testing of a portion of the samples showed a bimodal appearance. On the other hand, in combination with the particle size distribution range of the plugging agent and the particle size range of each raw material, in this embodiment, the raw materials with different particle sizes are affected by the self-properties, the environmental humidity, the processing equipment and other factors during the mixing process, and a certain agglomeration phenomenon exists, that is, large particle aggregates are formed, so that the D90 of the plugging agent and the upper limit value of the particle size distribution range are increased.
(II) Effect on the Performance of Bentonite drilling fluids
The experimental method comprises the following steps: distilled water according to 1L: 30g bentonite for slurry preparation: a base slurry was prepared at a rate of 1.5g sodium carbonate. Measuring 300mL of base slurry, adding 2% of the micro-polymorphic particle size broad-spectrum plugging agent sample in examples 1-8, and after high stirring for 5min, respectively testing apparent viscosity, medium-pressure fluid loss and high-temperature high-pressure fluid loss (150 ℃ and 3.5 MPa) according to GB/T16783.1-2014; and the drilling fluid intrusion sand bed depth and sand bed fluid loss (0.69 MPa) of the 60-80 mesh quartz sand bed are respectively tested by using an FA type non-infiltration fluid loss instrument, and the related detection results are shown in Table 2. Wherein the total depth of the quartz sand bed is 18cm.
Table 2 performance impact results of bentonite drilling fluids
The base stock and the corresponding sand bed test results in examples 4-8 are shown in fig. 6-11. As can be seen from table 2 and fig. 6 to 11, in this embodiment, after the bentonite-based slurry is added to the sample of the plugging agent with a broad spectrum of microscopic polymorphic particle sizes, the viscosity is slightly increased, the medium-pressure fluid loss and the high-temperature high-pressure fluid loss are reduced, and the plugging agent has an obvious plugging effect on 60-80 mesh sand beds. On the other hand, from the relevant test data, it can be assumed that the blocking agent, after being formulated into the drilling fluid, has large particle aggregates redispersed, thereby exerting good blocking properties.
(III) Performance Effect on in situ well slurry
The experimental method comprises the following steps: taking on-site water-based drilling fluid slurry (density 1.6g/cm 3) of a certain well in the site, adding 2% of a broad-spectrum plugging agent sample with microscopic multi-morphology particle size, stirring for 5min, and placing into an aging tank for rolling aging at 150 ℃ for 16h. Taking out, cooling, and respectively testing apparent viscosity, medium-pressure fluid loss and high-temperature high-pressure fluid loss (150 ℃ and 3.5 MPa) according to GB/T16783.1-2014, wherein the related detection results are shown in Table 3.
TABLE 3 results of Performance impact of in situ well slurries
As can be seen from the data in table 3, the addition of the broad-spectrum plugging agent samples of microscopic polymorphic particle size to the well slurry in this example helps reduce viscosity, medium pressure water loss and high temperature and high pressure water loss. The plugging agent sample can be used for plugging well slurry.
(IV) microscopic morphology
In this example, a broad spectrum of the plugging agent sample with a microscopic polymorphic particle size in example 3 was observed by electron microscopy, and the microscopic photographing result at 10 x magnification is shown in fig. 12. As can be seen from the figure, the blocking agent has various forms such as particles, flakes, and fibers having different particle diameters.
Claims (9)
1. The broad-spectrum plugging agent with microscopic polymorphic grain size is characterized by comprising the following raw materials in percentage by mass, wherein the sum of the mass percentages is 100 percent:
8-15 wt% of silicon dioxide powder;
20-25wt% of calcium carbonate powder;
Diatomite, 0-5wt%;
17-21 wt% of asbestos powder;
5-20wt% of wood powder;
Sepiolite powder, 1-3wt%;
0-16wt% of graphite powder;
8-16wt% of mica powder;
5-16wt% of asphalt powder;
Wherein the particle size of the silicon dioxide powder is 800 nm-1000 nm;
the particle size of the calcium carbonate powder is 400-18000 meshes;
the particle size of the diatomite is 300 meshes;
The particle size of the asbestos powder is 400-1000 meshes;
The particle size of the sepiolite powder is 800-1000 meshes;
the grain diameter of the wood powder is 1000 meshes;
The particle size of the graphite powder is 400-1000 meshes;
the particle size of the mica powder is 600-1000 meshes;
The particle size of the asphalt powder is 400-600 meshes.
2. The broad-spectrum blocking agent according to claim 1, wherein the calcium carbonate powder comprises calcium carbonate having a particle size of 400 meshes, calcium carbonate having a particle size of 1200 meshes, calcium carbonate having a particle size of 2000 meshes and calcium carbonate having a particle size of 800nm to 1000nm, and the weight ratio of calcium carbonate having a particle size of 400 meshes, calcium carbonate having a particle size of 1200 meshes, calcium carbonate having a particle size of 2000 meshes and calcium carbonate having a particle size of 800nm to 1000nm is 1: 1-3: 1-2: 0.1-1; or the calcium carbonate powder is calcium carbonate with the particle size of 400 meshes.
3. The broad-spectrum plugging agent with microscopic polymorphic particle size according to claim 2, wherein the weight ratio of the calcium carbonate with particle size of 400 meshes to the calcium carbonate with particle size of 1200 meshes to the calcium carbonate with particle size of 2000 meshes to the calcium carbonate with particle size of 800-1000 nm is 1:2:2:0.5.
4. The broad-spectrum plugging agent according to claim 1, wherein the asbestos powder comprises an asbestos powder having a particle size of 400 meshes, an asbestos powder having a particle size of 600 meshes and an asbestos powder having a particle size of 1000 meshes, and the weight ratio of the asbestos powder having a particle size of 400 meshes, the asbestos powder having a particle size of 600 meshes and the asbestos powder having a particle size of 1000 meshes is 1:1:1, a step of; or the asbestos powder is all asbestos powder with the particle size of 600 meshes.
5. The broad-spectrum plugging agent according to claim 1, wherein the sepiolite powder comprises sepiolite powder having a particle size of 800 meshes and sepiolite powder having a particle size of 1000 meshes, and the weight ratio of the sepiolite powder having a particle size of 800 meshes to the sepiolite powder having a particle size of 1000 meshes is 1:1, a step of; or sepiolite powder with particle size of 1000 meshes.
6. The broad-spectrum plugging agent according to claim 1, wherein the graphite powder comprises 400 mesh graphite powder, 600 mesh graphite powder and 1000 mesh graphite powder, and the weight ratio of 400 mesh graphite powder, 600 mesh graphite powder and 1000 mesh graphite powder is 1:1:1, a step of; or the graphite powder is the graphite powder with the particle size of 600 meshes.
7. The broad-spectrum plugging agent according to claim 1, wherein the mica powder comprises a mica powder having a particle size of 600 meshes, a mica powder having a particle size of 800 meshes and a mica powder having a particle size of 1000 meshes, and the weight ratio of the mica powder having a particle size of 600 meshes, the mica powder having a particle size of 800 meshes and the mica powder having a particle size of 1000 meshes is 1:2:2.5; or the mica powder is all the mica powder with the particle size of 800 meshes.
8. The broad-spectrum plugging agent with microscopic multi-morphology particle size according to claim 1, wherein the asphalt powder comprises asphalt powder with a softening point of 120 ℃ and asphalt powder with a softening point of 150 ℃, and the weight ratio of the asphalt powder with the softening point of 120 ℃ to the asphalt powder with the softening point of 150 ℃ is 1-2: 1.
9. The broad-spectrum plugging agent according to claim 8, wherein the weight ratio of asphalt powder having a softening point of 120 ℃ to asphalt powder having a softening point of 150 ℃ is 1:1.
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| CN103146362A (en) * | 2013-04-09 | 2013-06-12 | 石家庄华莱鼎盛科技有限公司 | Broad spectrum type high-efficient blocking agent for drilling fluid |
| CN104774598A (en) * | 2015-03-07 | 2015-07-15 | 中石化石油工程技术服务有限公司 | High-temperature-resistant plugging agent for drilling fluid and preparation method thereof |
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| ATE315715T1 (en) * | 2000-04-24 | 2006-02-15 | Shell Int Research | APPARATUS AND METHOD FOR TREATING PETROLEUM RESERVES |
| CN1171969C (en) * | 2002-01-14 | 2004-10-20 | 中国石油化工股份有限公司 | Temporary leakage-stopping agent for well drilling shielding and its application |
| US8935957B2 (en) * | 2013-03-13 | 2015-01-20 | Halliburton Energy Services, Inc. | Methods of designing a drilling fluid having suspendable loss circulation material |
| CA2925115C (en) * | 2013-11-25 | 2018-06-05 | Halliburton Energy Services, Inc. | A fiber suspending agent for lost-circulation materials |
| CN110551491B (en) * | 2018-05-31 | 2021-11-26 | 中国石油化工股份有限公司 | Coating plugging agent, preparation method thereof and plugging slurry |
| CN109852356A (en) * | 2019-01-15 | 2019-06-07 | 古莱特科技股份有限公司 | A kind of closure oil/gas well formation channels compound leakage stop agent |
| CN111808582A (en) * | 2020-08-07 | 2020-10-23 | 西南石油大学 | Plugging agent for drilling fluid and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103146362A (en) * | 2013-04-09 | 2013-06-12 | 石家庄华莱鼎盛科技有限公司 | Broad spectrum type high-efficient blocking agent for drilling fluid |
| CN104774598A (en) * | 2015-03-07 | 2015-07-15 | 中石化石油工程技术服务有限公司 | High-temperature-resistant plugging agent for drilling fluid and preparation method thereof |
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