High-efficiency energy-saving bridging channel full-coupling fiber proppant system and application method thereof

A proppant, fully coupled technology, used in chemical instruments and methods, production fluids, earthwork drilling, etc., can solve the problem of failure to meet the needs of hydraulic fracturing in multiple wells, high prices of coated proppants, formation cracks and pores Damage and other problems, to achieve the effect of efficient suspension, low price, and little environmental damage

Active Publication Date: 2020-11-20
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also deficiencies in the above aspects: 1) Since unconventional reservoirs in my country are enriched in areas such as high mountains and hills, water resources are relatively scarce. Although improving the performance of fluids can improve the effective placement of proppant, limited water resources are also limited. It failed to meet the hydraulic fracturing needs of many wells; secondly, the high-viscosity fracturing fluid damages the formation is also particularly prominent, especially for the plugging of small pores and f

Method used

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  • High-efficiency energy-saving bridging channel full-coupling fiber proppant system and application method thereof
  • High-efficiency energy-saving bridging channel full-coupling fiber proppant system and application method thereof
  • High-efficiency energy-saving bridging channel full-coupling fiber proppant system and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] Example 1

[0038] like figure 1 and 2 Distance figure 1 It is a structural diagram of a conventional proppant. figure 2 It is a schematic structural diagram of the film support proppant of the present invention. It can be seen that the coating proppant of the present invention has a nuclear shell structure, and its core is a conventional proppant, and a connecting layer and a shell layer are disposed in sequentially in the surface of conventional proppants. The connection layer is located between the core and the shell layer for fixing the core and shell layer.

Example Embodiment

[0039] Example 2

[0040] Preparation of a coating proppant:

[0041] The film support proppant selected from the core, 3-aminopropyltriethoxysilane and 3-chloro-1,2-propylene oxide are a joint layer, and the coconut oil amide group hydroxy sulfonase is a shell layer. All raw materials are shown in Table 1:

[0042] Table 1 Raw materials used in film support

[0043]

[0044] Preparation method steps:

[0045] (1) Select 20 / 40 destination quartz sand to the reaction vessel, soaked with 1 wt% HCl solution for 30 min to remove stains of the surface of the quartz sand; remove the liquid to remove residual acid to neutral; at 105 ° C After drying for 2 hours, standby.

[0046] (2) Take 3-aminopropyltriethoxysilane to the reaction vessel, ethanol is added as a solvent, stirred at room temperature; then add step (1) to the reaction vessel to wash the dry quartz sand, stirred at room temperature 10mim His uniform; the temperature of the reactor was raised to 80 ° C, and the reaction wa...

Example Embodiment

[0049] Example 3

[0050] Preparation method of film support proppant:

[0051] The film support proppant selection 40 / 70 mesh particles, N- (β-aminoethyl) -γ-aminopropyltriethoxysilane and pentarrhalderals are a connecting layer, and 10000 molecular weight oil-soluble polymers are shells. Floor. All raw materials formula are shown in Table 2:

[0052] Table 2 Film proppases used

[0053]

[0054] Preparation method steps:

[0055] (1) Select 40 / 70 destination ceramics to the reaction vessel, soak the stains of the stone sand surface with 1 wt% HCl solution; remove the liquid to remove the liquid, remove residual acid to neutral; at 105 ° C After drying for 2 hours, standby.

[0056] (2) Take N- (β-aminoethyl) -γ-aminopropyltriethoxysilane to the reaction vessel, ethanol is added as a solvent, and stirred at room temperature; then add step (1) to the reaction vessel. Net dry quartz sand, stirred at room temperature for 10 mIM mixed; the reactor temperature was raised to 75 ° C, ...

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Abstract

The invention discloses a high-efficiency energy-saving bridging channel full-coupling fiber proppant system for fracturing. The system comprises fracturing fluid, special fibers and a laminating proppant, wherein the special fibers are conventional fibers treated by a surface modifier; the laminating proppant takes a conventional proppant as a core, and the surface of the conventional proppant issequentially coated with a connecting layer and a housing layer, wherein the connecting layer is composed of a nitrogen-containing silane coupling agent and a cross-linking agent; and the material ofthe housing layer is a small molecular surfactant or an oil-soluble low-molecular-weight polymer, wherein the oil-soluble low-molecular-weight polymer is one or a combination of at least two of anionic polyacrylamide and derivatives thereof. According to the sand carrying system, through the mutual coupling effect of the laminating proppant and the special fibers, efficient suspension of the proppant, repeated cyclic utilization of reverse drainage liquid and an oil-gas high-speed channel formed in a unique self-bridging mode are finally achieved.

Description

technical field [0001] The invention relates to the technical field of oil and gas stimulation and reformation, in particular to a sand-carrying system and an application method for improving the effective laying of proppant used in the field of fracturing. Background technique [0002] With the continuous exploitation and excavation of conventional oil and gas resources, the production stimulation of unconventional oil and gas reservoirs (shale oil and gas, tight oil and gas, coalbed methane, etc.) is particularly critical and urgent. However, due to the low permeability of unconventional oil and gas reservoirs, traditional mining methods cannot effectively develop such reservoirs. Therefore, hydraulic fracturing technology is particularly important for the effective development of such reservoirs. Hydraulic fracturing technology is mainly divided into the following steps: 1) Inject high-pressure fluid to rupture the reservoir and generate fracture channels; 2) Inject sand...

Claims

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Application Information

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IPC IPC(8): C09K8/80C09K8/68C09K8/88C09K8/90E21B43/267
CPCC09K8/685C09K8/805C09K8/882C09K8/887C09K8/90C09K2208/08E21B43/267
Inventor 李骏吴明移周利华何思源李年银桑宇钟世超黄亮郭玉杰张玉萍韩旭
Owner SOUTHWEST PETROLEUM UNIV
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