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Oil-soluble mounting medium for bottom water reservoir fracturing, and preparation method thereof

A bottom-water reservoir and oil-soluble technology, applied in chemical instruments and methods, drilling compositions, building components, etc., can solve the problems of high liquid absorption strength, little effect, and large limitations, and achieve high sealing The effect of blocking strength

Inactive Publication Date: 2018-07-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fracturing of bottom water reservoirs has the following difficulties: the distance between the oil layer and the water layer is short, the stress difference between the oil layer and the interlayer is small, and the fractures are easy to extend downward; When there is a big difference between the viscosity of crude oil and the viscosity of water, it is easier to form bottom water coning, and the phenomenon of water flooding will be more serious
[0003] At present, the main technology used in the fracturing of bottom water reservoirs in China is to optimize the construction parameters and carry out small-scale fracturing operations with small displacement, so as to solve the purpose of fracturing and reconstruction of some bottom water reservoirs to a certain extent. For example, when a large-scale fracturing operation is required for bottom water reservoirs with low permeability, the above methods will have little effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] An oil-soluble sealant for bottom water reservoir fracturing, comprising the following components in mass percentage:

[0031] 40 / 70 mesh ceramsite: 8%;

[0032] Rosin resin: 17%;

[0033] Darmar resin: 6%;

[0034] Petroleum resin: 21%;

[0035] Oil-soluble phenolic resin: 9%;

[0036] Terpene resin: 18%;

[0037] Petroleum pitch: 11%;

[0038] Polyethylene wax: 3%;

[0039] 120 mesh barite: 7%.

[0040] Preparation method: Weigh 85kg of rosin resin, 30kg of dammar resin, 105kg of petroleum resin, 45kg of oil-soluble phenolic resin, 90kg of terpene resin, 55kg of petroleum pitch, and 15kg of polyethylene wax. The remaining materials on the mesh screen are pulverized for the second time until all the particle sizes of the materials pass through the 20-mesh screen. Add the pulverized powder into the kneader, control the heating rate of 0.8°C / min, all the materials will melt after the temperature rises to 126°C, keep the temperature at 126°C±3°C, add 0.15~0.30mm70...

Embodiment 2

[0042] An oil-soluble sealant for bottom water reservoir fracturing, including the following components in mass percentage:

[0043] 40 / 70 mesh ceramsite: 7%;

[0044] Rosin resin: 16%;

[0045] Darmar resin: 8%;

[0046] Petroleum resin: 21%;

[0047] Oil-soluble phenolic resin: 6%;

[0048] Terpene resin: 19%;

[0049] Petroleum pitch: 13%;

[0050] Polyethylene wax: 2%;

[0051] 100 / 120 mesh barite: 8%.

[0052] Preparation method: Weigh 80kg of rosin resin, 40kg of dammar resin, 105kg of petroleum resin, 30kg of oil-soluble phenolic resin, 95kg of terpene resin, 65kg of petroleum pitch, and 10kg of polyethylene wax. The remaining materials on the mesh screen are pulverized for the second time until all the particle sizes of the materials pass through the 20-mesh screen. Put the pulverized powder into the kneader, control the heating rate of 1.0°C / min, all the materials will melt after the temperature rises to 122°C, keep the temperature at 122°C±3°C, add 40 / 70 mesh...

Embodiment 3

[0054] An oil-soluble sealant for bottom water reservoir fracturing, including the following components in mass percentage:

[0055] 70 / 100 mesh ceramsite: 5%;

[0056] Rosin resin: 15%;

[0057] Darmar resin: 9%;

[0058] Petroleum resin: 17%;

[0059] Oil-soluble phenolic resin: 10%

[0060] Terpene resin: 15%;

[0061] Petroleum pitch: 12%

[0062] Polyethylene wax: 3%;

[0063] 120 / 150 mesh calcium carbonate: 14%

[0064] Preparation method: Weigh 75kg of rosin resin, 45kg of dammar resin, 85kg of petroleum resin, 50kg of oil-soluble phenolic resin, 75kg of terpene resin, 60kg of petroleum pitch, and 15kg of polyethylene wax. The remaining materials on the mesh screen are pulverized for the second time until all the particle sizes of the materials pass through the 20-mesh screen. Put the pulverized powder into the kneader, control the heating rate of 0.8°C / min, and all the materials will melt after the temperature rises to 122°C, keep the temperature at 122°C±3°C, ...

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Abstract

The invention discloses an oil-soluble mounting medium for bottom water reservoir fracturing, and belongs to the field of oilfield production. The mounting medium comprises, by mass, 5-10% of a framework material, 15-20% of rosin resin, 5-10% of dammar resin, 15-25% of petroleum resin, 8-12% of oil-soluble phenolic resin, 15-20% of terpene resin, 6-12% of petroleum asphalt, 2-4% of polyethylene, and the balance of a density regulator, wherein the framework material is ceramsite, and the density regulator is barite or calcium carbonate. The product has a high plugging strength, prevents bottomwater from coning, and can achieve water production control and oil production increase. A preparation method of the product comprises the following steps: mixing and crushing the rosin resin, dammarresin, petroleum resin, oil-soluble phenolic resin, terpene resin, petroleum asphalt and polyethylene wax, heating the obtained mixture until the mixture is completely melted, adding the framework material and the density regulator at a constant temperature, kneading the obtained mixture until the material is uniformly mixed, pouring the mixture into a container, naturally cooling the mixture to room temperature, and breaking, crushing and sieving the mixture. The preparation method has the advantages of simplicity and easily available raw materials.

Description

technical field [0001] The invention belongs to the field of oil field stimulation, and relates to an oil-soluble sealing agent for bottom water oil reservoir fracturing and a preparation method thereof. Background technique [0002] During the production of bottom water reservoirs, along with the production of crude oil, the bottom water tends to move up and form water cones, resulting in high water cut in oil wells. The fracturing of bottom water reservoirs has the following difficulties: the distance between the oil layer and the water layer is short, the stress difference between the oil layer and the interlayer is small, and the fractures are easy to extend downward; When there is a big difference between the viscosity of crude oil and the viscosity of water, it is easier to form bottom water coning, and the phenomenon of water flooding will be more serious. [0003] At present, the main technology used in the fracturing of bottom water reservoirs in China is to optimi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/502C08L57/02C08L93/04C08L93/00C08L45/00C08L61/06C08L95/00C08L23/06C08K3/00C08K3/30C08K3/26
CPCC08K2003/265C08K2003/3045C08K2201/014C08L45/00C08L57/02C08L93/04C09K8/502C08L93/00C08L61/06C08L95/00C08L23/06C08K3/00C08K3/30C08K3/26
Inventor 郭钢郑明科李宪文张矿生唐梅荣薛小佳李楷吴江范华波刘锦王博赵鹏云詹益旺陈忠强
Owner PETROCHINA CO LTD
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