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Granular polymer channeling channel plugging agent and preparation method thereof

A technology of polymer and particle type, which is applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of difficult construction and operation, and achieve the effects of shortening the setting time, simple construction process and simple production process

Active Publication Date: 2021-10-08
DAGANG OIL FIELD GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, conventional oil well cement needs to be mixed with tap water during construction, because conventional oil well cement does not solidify in the polymer solution, and there is usually no tap water near the polymer injection well, so the construction is not easy to operate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: raw materials: sulphoaluminate cement clinker, polypropylene fiber, sodium silicate and potassium formate, triethanolamine.

[0030] (1) First, add sulphoaluminate cement clinker into the pulverizer and run for 10 minutes. Then, the crushed cement clinker is screened with a standard sieve, and the sulphoaluminate cement clinker with a particle size of less than 0.01mm and between 0.1mm and 1mm is screened out for use.

[0031] (2) Put 1 g of polypropylene fibers with a diameter of 30 um and a length of 3 mm and 0.1 g of triethanolamine into a kneader, and mix for 10 minutes. Put 10g of the Ф<0.01mm cement clinker powder sieved in the first step into the grinder, mix for 10 minutes, the surface of the polypropylene fiber is roughened, and the cement clinker powder embedded is stained, and filtered with a 0.01mm sieve The excess cement clinker powder is removed to obtain the treated polypropylene fiber for use.

[0032] (3) Weigh 100gФ of 0.1-1mm sulfoalum...

Embodiment 2

[0040] Raw materials: sulphoaluminate cement clinker, polypropylene fiber, sodium silicate and potassium formate, triethanolamine.

[0041] Preparation method: (1) Firstly, add an appropriate amount of sulphoaluminate cement clinker into the pulverizer, and run for 5 minutes. Then, the crushed cement clinker is screened with a standard sieve, and the sulphoaluminate cement clinker with a particle size of less than 0.01mm and between 0.2mm and 1.5mm is screened for use.

[0042] (2) Put 1 g of polypropylene fibers with a diameter of 40 um and a length of 6 mm and 0.1 g of triethanolamine into a kneader, and mix for 10 minutes. Put 10g of the Ф<0.01mm cement clinker powder sieved in the first step into the grinder, mix for 10 minutes, the surface of the polypropylene fiber is roughened, and the cement clinker powder embedded is stained, and filtered with a 0.01mm sieve The excess cement clinker powder is removed to obtain the treated polypropylene fiber for use.

[0043](3) We...

Embodiment 3

[0051] Raw materials: sulphoaluminate cement clinker, polypropylene fiber, sodium silicate and potassium formate, triethanolamine.

[0052] Preparation method: (1) Firstly, add an appropriate amount of sulphoaluminate cement clinker into the pulverizer, and run for 5 minutes. Then the crushed cement clinker is sieved with a standard sieve, and the sulphoaluminate cement clinker with a particle size of less than 0.01mm and between 0.3mm and 2mm is screened out for use.

[0053] (2) Put 1 g of polypropylene fibers with a diameter of 60 um and a length of 9 mm and 0.1 g of triethanolamine into a kneader, and mix for 10 minutes. Put 10g of the Ф<0.01mm cement clinker powder sieved in the first step into the grinder, mix for 20 minutes, the surface of the polypropylene fiber is roughened, and stained with embedded cement clinker powder, filter with a 0.01mm sieve The excess cement clinker powder is removed to obtain the treated polypropylene fiber for use.

[0054] (3) Weigh 100g...

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Abstract

The invention belongs to the field of petroleum exploitation, and in particular relates to a granular polymer channeling channel plugging agent and a preparation method thereof. The granular polymer channeling channel sealing agent comprises the following components in parts by mass: sulphoaluminate cement 100 parts of clinker, 0.5-2 parts of pretreated polypropylene fiber; 0.8-2 parts of sodium silicate, and 0.8-2 parts of potassium formate. The particle size-adjustable particle-type plugging agent obtained in the present invention can achieve "blocking but not death" for the construction target layer by adjusting the particle size. And the validity period is close to that of cement. Compared with organic gels and non-consolidated solid particle plugging agents, it has obvious advantages of high-strength plugging, and the particles and particles, particles and the original pore wall of the formation can be consolidated as a whole, and can form an adjustable permeability and shear resistance. Destroyed man-made sand bodies inhibit subsequent water injection or polymer injection channeling. The product of the invention only needs to be injected into the formation with the polymer solution on site, and the construction process is simple.

Description

technical field [0001] The invention belongs to the field of oil exploitation, and in particular relates to a granular polymer channeling channel plugging agent and a preparation method thereof. Background technique [0002] Polymer flooding is widely used in oilfields in the central and eastern regions of my country. Injecting a polymer (usually anionic polyacrylamide) solution into the water injection well can displace the crude oil in the oil layer to the oil production well. In theory, polymer flooding can increase oil recovery by more than 15%. [0003] When polymer flooding is actually implemented, it is hoped that the injected polymer solution will advance evenly to the surrounding oil wells (usually four oil wells around one injection well). Due to the inherent inhomogeneity in the oil layer and the large pores between oil and water wells (ie, channeling channels) formed by water injection in the later stage, the polymer solution will quickly channel from the water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/508C09K8/50
CPCC09K8/50C09K8/5045C09K8/5083C09K2208/08
Inventor 葛红江李冉张宏峰雷齐玲程静滕国权易博郭志强张津红袁肖肖杨卫华
Owner DAGANG OIL FIELD GRP
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