CA2681527A1 - A method of gravel packing a well - Google Patents
A method of gravel packing a well Download PDFInfo
- Publication number
- CA2681527A1 CA2681527A1 CA 2681527 CA2681527A CA2681527A1 CA 2681527 A1 CA2681527 A1 CA 2681527A1 CA 2681527 CA2681527 CA 2681527 CA 2681527 A CA2681527 A CA 2681527A CA 2681527 A1 CA2681527 A1 CA 2681527A1
- Authority
- CA
- Canada
- Prior art keywords
- gravel
- particles
- well
- polydicyclopentadiene
- present
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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- Lining And Supports For Tunnels (AREA)
- Sealing Material Composition (AREA)
Abstract
The present invention relates to the use of polyPCPD materials as gravel for treating subterranean formations, particularly for sand control operations.
The disclosed method of sand control consists in gravel packing a well and comprises the injection of a slurry into a well, with the slurry containing a fluid and a particulate material comprising polydicyclopentadiene particles. The method provides a better retention of formation sand and fines due to a more uniform packing of polydicyclopentadiene particles.
The disclosed method of sand control consists in gravel packing a well and comprises the injection of a slurry into a well, with the slurry containing a fluid and a particulate material comprising polydicyclopentadiene particles. The method provides a better retention of formation sand and fines due to a more uniform packing of polydicyclopentadiene particles.
Description
A Method of Gravel Packing a Well Field of the Invention The present invention provides a novel particulate material for treatment of subterranean formations. More particularly, it relates to gravel packing.
Gravel packing is used for sand control purposes. A typical gravel pack job includes downhole installation of a screen and injection of gravel between the screen and the perforated casing. The gravel prevents the formation sand from entering the well, whilst the reservoir fluids are allowed to flow into the well through the gravel and the screen. Occasionally, the gravel pack can be placed downhole without a screen.
The success of gravel pack operations strongly relies on the ability of the treating fluids to suspend and transport gravel. The transport of particles is critical in horizontal and deviated wells.
The purpose of the present invention is to provide an improved method of treating the formation by using polyDCPD materials as gravel. These materials have relatively low specific gravity and high compressive strength. Particles made of polyDCPD can be easily transported by the treating fluid as neutrally buoyant.
The use of these particles is particularly beneficial in operations where carrier fluid viscosities are low.
Prior Art A variety of sand control methods using various types of gravel packing are known. Possible solutions are disclosed in the following patents:
1. US7255168, this Patent discloses composite particulates and methods of using such particulates in subterranean applications. The composite particulate comprises a homogeneous mixture of polyethylene terephthalate (PET) and a filler material. The filler material can contain from about 5% to about 70% by weight of the overall particulate. It can be any micro-sized particle that is compatible with the thermoplastic material, such as cenospheres, microspheres, fly ash, etc.
2. US7281580, this patent discloses a method of fracturing by using adhesive-coated, high-density plastic particles.
The method, which seems closest to the present Invention, is the one described in Patent GB2436011. The latter discloses the use of a proppant made of polyamide for fracturing and sand control. However, the main disadvantage of this method is a lower level of strength.
Summary of the Invention The improved method of sand control of the present Invention consists in placing a gravel pack in a well using a novel type of particulate material that posseses high crushing strength and chemical inertness. The method consists in creating a gravel pack in a well by injecting a slurry that contains a fluid and a particulate material comprising particles made of polydicyclopentadiene (hereinafter referred to as polyDCPD). =
The engineering result achieved through the implementation of the present invention is providing a better retention of formation sand and other small particles due to a more uniform packing of gravel. Since the specific gravity of PoIyDCPD
particles is close to 1, the gravel settling velocity is negligible and particles can be transported in a neutrally buoyant manner, which is especially beneficial in gravel packing of deviated and horizontal wells.
This technical result is attained by using the method of the present invention, i.
e. the creation of a gravel pack in a well by injecting a slurry that contains a fluid and a particulate material comprising particles made of polydicyclopentadiene. The gravel particles can be of any size, shape and mixtures of various shapes and sizes.
Non-spherical particles can be elongated, prolate, polygonal, cubic, fibrous etc. The PoIyDCPD gravel of the present Invention can be reinforced with suitable filler materials such as clay, silica, fibers, ceramic etc.
Patent search resulted in finding no solutions containing the entire combination of the features claimed, which enables making the conclusion of the compliance of the present Invention with the "novelty" criterion.
Description The present invention relates to the use of polyPCPD particles as gravel in gravel packing operations. The PoIyDCPD gravels of the present Invention are lightweight and high strength particles made of PoIyDCPD. PoIyPCPD has a compressive strength of up to approximately 60 MPa and a density of approximately 0.95-1.03 g/cm3. Therefore, particles made of polyPCPD can be easily suspended and transported by a treating fluid in a neutrally buoyant manner.
The advantage of the present Invention is that a more uniform packing of gravel and its high strength provides better retention of formation sand, whilst keeping_ sufficient gravel pack permeability. Since the specific gravity of PoIyDCPD
particles is close to 1, the gravel settling is negligible even in low-viscosity carrier fluids, such as water. Thus, a more uniform packing of particles is achieved. Negligible settling velocity is especially beneficial in gravel packing of deviated and horizontal wells.
Moreover, the present Invention allows avoiding the use of highly viscous fluids and therefore, reducing the formation damage that these fluids induce.
Among polymer materials, PoIyDCPD possesses a unique combination of mechanical, chemical and physical properties, which makes it a good alternative to polyethylene, polystyrene, fiberglass, polyether, carbon fiber, aluminum alloys, and other materials. PoIyDCPD is characterized by low density (close to the density of water), excellent combination of stiffness and impact resistance, as well as high chemical and temperature resistance.
The gravel particles of the present Invention can be of any size, shape and mixtures of various shapes and various sizes. Non-spherical proppants can be elongated, prolate, polygonal, cubic, fibrous etc. The PoIyDCPD gravel of the present Invention can be reinforced with suitable filler materials, such as clay, silica, fibers, ceramic etc.
High-purity polyDCPD Noveon is manufactured by "Telene DCPD" Company for European and Chinese markets.
PoIyDCPD "Metton8n PDCPD", which is basically similar to "Telene ", is manufactured by Metton America Inc. and applied for large scale production as an alternative of fiberglass, wood or metal.
The invention complies with "industrial applicability" criterion since its implementation will require using existing production facilities and applying known technologies.
Gravel packing is used for sand control purposes. A typical gravel pack job includes downhole installation of a screen and injection of gravel between the screen and the perforated casing. The gravel prevents the formation sand from entering the well, whilst the reservoir fluids are allowed to flow into the well through the gravel and the screen. Occasionally, the gravel pack can be placed downhole without a screen.
The success of gravel pack operations strongly relies on the ability of the treating fluids to suspend and transport gravel. The transport of particles is critical in horizontal and deviated wells.
The purpose of the present invention is to provide an improved method of treating the formation by using polyDCPD materials as gravel. These materials have relatively low specific gravity and high compressive strength. Particles made of polyDCPD can be easily transported by the treating fluid as neutrally buoyant.
The use of these particles is particularly beneficial in operations where carrier fluid viscosities are low.
Prior Art A variety of sand control methods using various types of gravel packing are known. Possible solutions are disclosed in the following patents:
1. US7255168, this Patent discloses composite particulates and methods of using such particulates in subterranean applications. The composite particulate comprises a homogeneous mixture of polyethylene terephthalate (PET) and a filler material. The filler material can contain from about 5% to about 70% by weight of the overall particulate. It can be any micro-sized particle that is compatible with the thermoplastic material, such as cenospheres, microspheres, fly ash, etc.
2. US7281580, this patent discloses a method of fracturing by using adhesive-coated, high-density plastic particles.
The method, which seems closest to the present Invention, is the one described in Patent GB2436011. The latter discloses the use of a proppant made of polyamide for fracturing and sand control. However, the main disadvantage of this method is a lower level of strength.
Summary of the Invention The improved method of sand control of the present Invention consists in placing a gravel pack in a well using a novel type of particulate material that posseses high crushing strength and chemical inertness. The method consists in creating a gravel pack in a well by injecting a slurry that contains a fluid and a particulate material comprising particles made of polydicyclopentadiene (hereinafter referred to as polyDCPD). =
The engineering result achieved through the implementation of the present invention is providing a better retention of formation sand and other small particles due to a more uniform packing of gravel. Since the specific gravity of PoIyDCPD
particles is close to 1, the gravel settling velocity is negligible and particles can be transported in a neutrally buoyant manner, which is especially beneficial in gravel packing of deviated and horizontal wells.
This technical result is attained by using the method of the present invention, i.
e. the creation of a gravel pack in a well by injecting a slurry that contains a fluid and a particulate material comprising particles made of polydicyclopentadiene. The gravel particles can be of any size, shape and mixtures of various shapes and sizes.
Non-spherical particles can be elongated, prolate, polygonal, cubic, fibrous etc. The PoIyDCPD gravel of the present Invention can be reinforced with suitable filler materials such as clay, silica, fibers, ceramic etc.
Patent search resulted in finding no solutions containing the entire combination of the features claimed, which enables making the conclusion of the compliance of the present Invention with the "novelty" criterion.
Description The present invention relates to the use of polyPCPD particles as gravel in gravel packing operations. The PoIyDCPD gravels of the present Invention are lightweight and high strength particles made of PoIyDCPD. PoIyPCPD has a compressive strength of up to approximately 60 MPa and a density of approximately 0.95-1.03 g/cm3. Therefore, particles made of polyPCPD can be easily suspended and transported by a treating fluid in a neutrally buoyant manner.
The advantage of the present Invention is that a more uniform packing of gravel and its high strength provides better retention of formation sand, whilst keeping_ sufficient gravel pack permeability. Since the specific gravity of PoIyDCPD
particles is close to 1, the gravel settling is negligible even in low-viscosity carrier fluids, such as water. Thus, a more uniform packing of particles is achieved. Negligible settling velocity is especially beneficial in gravel packing of deviated and horizontal wells.
Moreover, the present Invention allows avoiding the use of highly viscous fluids and therefore, reducing the formation damage that these fluids induce.
Among polymer materials, PoIyDCPD possesses a unique combination of mechanical, chemical and physical properties, which makes it a good alternative to polyethylene, polystyrene, fiberglass, polyether, carbon fiber, aluminum alloys, and other materials. PoIyDCPD is characterized by low density (close to the density of water), excellent combination of stiffness and impact resistance, as well as high chemical and temperature resistance.
The gravel particles of the present Invention can be of any size, shape and mixtures of various shapes and various sizes. Non-spherical proppants can be elongated, prolate, polygonal, cubic, fibrous etc. The PoIyDCPD gravel of the present Invention can be reinforced with suitable filler materials, such as clay, silica, fibers, ceramic etc.
High-purity polyDCPD Noveon is manufactured by "Telene DCPD" Company for European and Chinese markets.
PoIyDCPD "Metton8n PDCPD", which is basically similar to "Telene ", is manufactured by Metton America Inc. and applied for large scale production as an alternative of fiberglass, wood or metal.
The invention complies with "industrial applicability" criterion since its implementation will require using existing production facilities and applying known technologies.
Claims (5)
1. A method of gravel packing a well, which comprises the injection of a slurry into a well, with the slurry containing a fluid and a particulate material comprising polydicyclopentadiene particles.
2. The method of claim 1, wherein polydicyclopentadiene particles may be of various shape.
3. The method of claim 2, wherein polydicyclopentadiene particles may be elongated and/or polygonal, and/or cubical, and/or spherical, and/or fibrous.
4. The method of claim 1, wherein polydicyclopentadiene particles may be reinforced with filler materials.
5. The method of claim 4, wherein the filler may be ceramic or silicon dioxide or fiber.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2008138639 | 2008-09-30 | ||
| RU2008138639/03A RU2381350C1 (en) | 2008-09-30 | 2008-09-30 | Method of well sending prevention with use of gravel filling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2681527A1 true CA2681527A1 (en) | 2010-03-30 |
Family
ID=42062713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2681527 Abandoned CA2681527A1 (en) | 2008-09-30 | 2009-09-30 | A method of gravel packing a well |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2681527A1 (en) |
| RU (1) | RU2381350C1 (en) |
-
2008
- 2008-09-30 RU RU2008138639/03A patent/RU2381350C1/en not_active IP Right Cessation
-
2009
- 2009-09-30 CA CA 2681527 patent/CA2681527A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| RU2381350C1 (en) | 2010-02-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |
Effective date: 20140625 |