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A self-generating heat and self-gas proppant and its preparation method and application method

A proppant and self-generating heat technology, applied in chemical instruments and methods, earthwork drilling, drilling composition, etc., can solve the problems of glue breaking, liquid flowback, unsatisfactory effect after pressing, etc., and achieve simple construction and operation. , the effect of promoting flowback and promoting rapid degradation

Active Publication Date: 2022-02-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The embodiment of the present invention provides a self-generating heat and self-generating proppant and its preparation method and application method. The problem of unsatisfactory effect; the second purpose is to solve the problems of liquid flowback, gel breaking and energy supplement after oil well fracturing

Method used

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  • A self-generating heat and self-gas proppant and its preparation method and application method
  • A self-generating heat and self-gas proppant and its preparation method and application method

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preparation example Construction

[0074] The present invention also protects a method for preparing a self-generating heat and self-generating proppant, comprising the following steps:

[0075] S001. According to the proportion, take ceramsite proppant or quartz sand proppant, immerse in the liquid binder, soak for 0.5min to 1.5min and then take it out to obtain product A;

[0076] S002. According to the ratio, take the nitrite and curing agent and put them into the mixing tank and stir for 4 minutes to 6 minutes, then put the product A into the mixing tank and continue stirring for 9 minutes to 11 minutes to complete the coating of the inner layer 2 of the agent on the outside of the inner core 1 to form a product B, put the product B into a vibrating sieve, and sieve off the unattached powder on the surface of the product B to obtain a modified proppant;

[0077] S003. According to the proportion, take the nitrogen-containing compound, acid catalyst, solid binder, curing agent and modified proppant, put them...

Embodiment 1

[0087] In this embodiment, the self-generating and self-generating proppant consists of the following components in parts by weight:

[0088] Core: 70 parts of ceramsite proppant, particle size 0.212mm-0.425mm, mesh number 40-70 mesh;

[0089] Medicament inner layer: 8 parts of sodium nitrite (nitrite), 3 parts of liquid polyethylene glycol (binder), molecular weight 200-600, 1.5 parts of propylenediamine (curing agent);

[0090] Drug outer layer: 7 parts of ammonium chloride (nitrogen-containing compound), 1.2 parts of citric acid (acid catalyst), 3 parts of solid polyethylene glycol (binder), molecular weight greater than 1000, 1 part of hexamethylenediamine (curing agent) ;

[0091] Protective layer: 1 part oil-soluble phenolic resin.

[0092] The preparation method of self-generating heat and self-generating proppant is as follows:

[0093] S001. According to the proportion, take the ceramsite proppant, immerse it in the liquid polyethylene glycol, take it out after soa...

Embodiment 2

[0100] In this embodiment, the self-generating and self-generating proppant consists of the following components in parts by weight:

[0101] Core: 71 parts of quartz sand proppant, particle size 0.15mm-0.35mm, mesh number 40-70 mesh;

[0102] Medicament inner layer: 9 parts of potassium nitrite (nitrite), 4 parts of liquid polyethylene glycol (binder), molecular weight 200-600, 2 parts of hexamethylenediamine (curing agent);

[0103] Agent outer layer: 8 parts of mixture of ammonium chloride and urea (nitrogen-containing compound), 1 part of fruit acid (acid catalyst), 3.5 parts of solid polyethylene glycol (binder), molecular weight greater than 1000, 1.5 parts of hexamethylenediamine (Hardener);

[0104] Protective layer: 2 parts oil-soluble phenolic resin.

[0105] The preparation method of self-generating heat and self-generating proppant is as follows:

[0106] S001. According to the proportion, take the quartz sand proppant, immerse it in liquid polyethylene glycol, ...

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Abstract

The invention protects the self-generating heat and self-gas proppant and its preparation method and application method. The proppant is composed of four parts: inner core, agent inner layer, agent outer layer, and protective layer from the inside to the outside. After the proppant enters the formation, the protective layer dissolves , The nitrogen-containing compound in the outer layer of the agent reacts with the nitrite in the inner layer of the agent under the action of an acidic catalyst to generate nitrogen and release heat. The generated heat can increase the temperature near the wellbore, promote the rapid degradation of injected fluid, reduce the viscosity of crude oil, and enhance the seepage capacity of crude oil; the large amount of gas generated is evenly dispersed in hydraulic fractures, promoting flowback, reducing reservoir damage, and The energy of the formation can be replenished to greatly increase the production after fracturing. In addition to supporting fractures, the proppant also has the functions of heating the formation, promoting flowback, and supplementing formation energy. It has the advantages of quick effect, long action time, simple construction operation, small safety risk, and easy promotion.

Description

technical field [0001] The invention belongs to the field of oil field development, and in particular relates to a self-generating heat and self-gas proppant, a preparation method and an application method thereof. Background technique [0002] In recent years, with the continuous development of exploration and development technology, more and more attention has been paid to the development of low permeability reservoirs and unconventional oil and gas resources. Hydraulic fracturing is also gaining more and more attention as a necessary means for stimulation of low permeability reservoirs and unconventional reservoirs. Hydraulic fracturing refers to the method of perforating, pumping liquid and proppant into the formation, creating a channel with conductivity, enhancing the communication between the wellbore and (production layer) reservoir, and increasing the production of a single well. Conventional proppants can only support fractures. With the advancement of technology,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80E21B43/267
CPCC09K8/805E21B43/267
Inventor 李川张矿生唐梅荣张翔余兴国向奎李昌恒王泫懿鲜晟吕昌盛
Owner PETROCHINA CO LTD