Locating high-strength blocking crack deflection fracturing resin coated sand and application process technology

A resin coating and cracking technology, applied in the directions of sealing/isolation, wellbore/well components, drilling composition, etc., can solve the problems of poor recracking effect, etc. The effect of improving the flow conductivity

Inactive Publication Date: 2016-10-26
唐山市金沙工贸有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the fracturing sand existing in the fracturing process of the existing fracturing well first enters the original fracturing formation but cannot fully reach the target layer, resulting in poor refracturing effect, the first aspect of the present invention is to provide a positioning high-strength fracture sealing Turning to the resin-coated sand for fracturing, the second is to provide an application technology of using the resin-coated sand, which can greatly improve the efficiency of fracturing construction, and greatly increase the oil and gas production of oil and gas wells

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0027] Embodiment 2 by weight

[0028] Put 70 parts of 20-mesh fruit shell powder into the mixing tank through the heating roller to make it evenly heated; add 0.1 part of silane adhesion promoter, 4 parts of phenolic resin, and 1 part of organic amine curing agent in sequence, mix well, and then use The drum heating furnace is coated on the surface of the main raw material support to obtain a semi-finished product, and then the semi-finished product is crushed and sieved to obtain a certain particle size of the positioned high-strength crack plugging and steering fracturing resin coated sand product. Resin-coated sand is used to position high-strength plugging fractures and turn to fracturing construction. During fracturing construction, it is first carried into the target layer with sand-carrying fluid or water, and the resin is coated within 2 to 24 hours at the formation temperature (above 25°C). Sand consolidation forms a high-strength sand-fixing body, which can deeply s...

Embodiment 3

[0029] Embodiment 3 by weight

[0030] Put 75 parts of 100-mesh quartz sand into the mixing tank through the heating drum to make it evenly heated; add 0.4 parts of silane adhesion promoter, 7 parts of urea-formaldehyde resin, and 2 parts of organic amine curing agent in sequence, and then use a drum heating furnace to evenly Coated on the surface of the quartz sand support to obtain a semi-finished product, and then crushed and sieved the semi-finished product to obtain a certain particle size of positioned high-strength crack plugging and steering fracturing resin coated sand product. Resin-coated sand is used to position high-strength plugging fractures and turn to fracturing construction. During fracturing construction, it is first carried into the target layer with sand-carrying fluid or water, and the resin is coated within 2 to 24 hours at the formation temperature (above 25°C). Sand can be consolidated to form a high-strength sand-fixing body, which can deeply plug art...

Embodiment 4

[0031] Embodiment 4 by weight

[0032] Put 78 parts of 150-mesh silicon dioxide into the mixing tank through the heating roller to make it evenly heated; add 0.5 parts of silane adhesion promoter, 5 parts of epoxy resin, and 3 parts of organic amine curing agent in sequence, and then heat it with a roller The furnace evenly coats the surface of the main raw material support to obtain a semi-finished product, and then crushes and sieves the semi-finished product to obtain a certain particle size of positioned high-strength crack plugging and steering fracturing resin-coated sand product. Resin-coated sand is used to position high-strength plugging fractures and turn to fracturing construction. During fracturing construction, it is first carried into the target layer with sand-carrying fluid or water, and the resin is coated within 2 to 24 hours at the formation temperature (above 25°C). Sand can be consolidated to form a high-strength sand-fixing body, which can deeply plug art...

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Abstract

The invention relates to a resin coated sand locating high-strength blocking crack deflection fracturing technology. Resin coated sand is prepared, the surface of a main raw material support is coated with a coupling agent, resin and a curing agent through heating equipment, and the finished resin coated sand product is obtained through further processing. The resin coated sand is used in the locating high-strength blocking crack deflection fracturing construction of an oil and gas well, during fracturing construction, sand-carrying fluid or water is used for carrying the resin coated sand into a target layer, and an artificial crack, or a natural crack or a low-pressure dominant passage in a high-water-content state can be deeply blocked. After the resin coated sand is cured, second fracturing is carried out, fluid is made to deflect through changes of fracturing pressure and crack extending pressure, and new cracks are formed in other directions and portions of a stratum. The fracturing construction effective rate can be greatly increased through the resin coated sand locating high-strength blocking crack deflection fracturing technology, new oil drainage area can be increased or added, a remaining oil enrichment region is communicated or produced, a reservoir stratum which is low in producing degree or not produced at all can be produced, and the oil and gas yield of the oil and gas well is substantially increased.

Description

technical field [0001] The invention belongs to the technical field of oil layer transformation technology in oil fields, and in particular relates to a positioning high-strength crack plugging and steering fracturing resin-coated sand and its application technology. Background technique [0002] Oil and gas wells in low permeability reservoirs often use fracturing as the main measure to improve the production of oil and gas wells. After the effective period of the measures, they must undergo repeated fracturing to maintain production. With the increase of oil and gas well development time and the number of measures, the production potential of the original artificial fractures is getting smaller and smaller. Due to the horizontal and vertical heterogeneity of reservoirs and the difference in producing degree of layers in different regions, large-scale refracturing can no longer meet the development needs of increasing and stabilizing oilfield production. [0003] Continue ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/508E21B33/138
CPCC09K8/5086C09K2208/18E21B33/138
Inventor 张会红宣高亮张会芳马怡琳
Owner 唐山市金沙工贸有限公司
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