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Oil and gas field exploitation method

A mining method and oil and gas field technology, applied in gas fields, oil fields, and shale gas mining fields, can solve problems such as groundwater pollution, unfavorable flowback, and poor strength, and achieve the effects of fast flowback, full filling, and shortened construction time

Inactive Publication Date: 2017-07-07
BEIJING RECHSAND SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, when the fracturing fluid is flowed back, it consumes a lot of pump power, which is not conducive to all flowbacks
If the polymer material and proppant are combined, there are problems of poor strength and difficulty in recycling. If the combined proppant is damaged, the polymer material will also enter the geological formation and cause groundwater pollution.

Method used

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  • Oil and gas field exploitation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Use quartz sand (river sand) 1000g as raw material, after scrubbing and drying, the sand does not contain water completely, and screens 20-40 mesh quartz sand as aggregate (the pretreatment process of quartz sand is the same in the following examples);

[0031] 2) Epoxy resin E-55, mixed with ethyl acetate at a ratio of 1:1. Stir evenly to prepare 50 mL of adhesive solution, then add aggregate and 10 g of guar gum to the adhesive solution.

[0032] 3) After the mixture obtained in step 2) is dried naturally, it is sieved.

[0033] The obtained proppant is particles with a particle size of 20-40 mesh (slightly larger than the particle size of the aggregate), and the surface of the aggregate is coated or partially coated with guar gum polymer material.

Embodiment 2

[0035] 1) Take 40-70 mesh 1kg quartz sand (eolian sand) as aggregate and set aside;

[0036] 2) Epoxy resin E-51, mixed with ethyl formate at a ratio of 1:1. Stir evenly to prepare 50 mL of adhesive solution, then add aggregate and 10 g carboxymethyl guar gum to the adhesive solution.

[0037] 3) After the mixture obtained in step 2) is dried naturally, it is sieved.

Embodiment 3

[0039] 1) Take 30-50 mesh 1kg quartz sand (sea sand) and sintered alumina as aggregates, the two materials have the same mesh, mix them in equal volumes, and set aside;

[0040] 2) Add 20 g of ethanol to 8 g of resole phenolic resin. Stir evenly, then add aggregate and 10g polyacrylamide to the adhesive solution.

[0041] 3) After the mixture obtained in step 2) is dried naturally, it is sieved.

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Abstract

The invention provides an oil and gas field exploitation method. The oil and gas field exploitation method comprises the steps that 5-60 parts of self-suspension proppants are added into 100 parts of natural water by volume to form proppant suspension liquid; and then the proppant suspension liquid is conveyed into an underground rock stratum. According to the oil and gas field exploitation method, the natural water is directly used as sand carrying liquid, no thickener is needed, and cost of construction liquid is remarkably reduced. No fracturing liquid needs to be prepared, the number of construction equipment is decreased, the construction process is simplified, the construction time is shortened, and the labor intensity of workers is relieved. The natural water contains no thickener, has little damage to a reservoir and is good in yield increasing effect. Stratum water is not polluted, and the environment is protected.

Description

technical field [0001] The invention belongs to the field of mineral exploitation, and in particular relates to a method for exploiting oil fields, gas fields and shale gas through hydraulic fracturing of cracks strengthened by supports. Background technique [0002] Water fracturing is a fracturing operation in which a small amount of additives such as drag reducers, stabilizers, and surfactants are added to clean water as a fracturing fluid, and it is also called drag-reducing water fracturing. Experiments have shown that the effect of clean water fracturing with proppant added is significantly better than that without proppant, which can keep the fracture open after the fracturing fluid returns. Clean water fracturing is the most important fracturing technology for shale gas development due to its low cost and low formation damage. [0003] However, the clear water in the existing clear water fracturing technology contains fluid loss control agents and thickeners, mainly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/267C08L63/02C08L61/06C08L5/00C08K3/36C08K3/22
CPCC08L61/06C08L63/00E21B43/267C08L5/00C08K3/36C08L33/26C08K2003/2227
Inventor 秦升益
Owner BEIJING RECHSAND SCI & TECH GRP
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