A kind of resin material for oil and gas well casing plugging and preparation method thereof

A technology of resin materials and oil and gas wells, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as inability to cure at right angles, insufficient air tightness, cracks, etc., to facilitate ground construction operations and simple and easy construction process The effect of small line and volume change rate
CN110105932BActive Publication Date: 2021-03-09PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
PETROCHINA CO LTD
Publication Date
2021-03-09

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Abstract

The invention belongs to the technical field of petroleum exploitation, and in particular relates to a resin material for leakage plugging of oil and gas well casings and a preparation method thereof. The present invention prepares polyester with a mass percentage of 65%-85% through five steps of preparing a polyester resin mixture, adding a coupling agent, adding a curing agent, adding a filler, adding an additive and a polyol solvent. Resin, 0.6%-3% curing agent, 3%-5% filler, 0.5%-1.5% coupling agent, 1%-3% additive, and the rest is polyol solvent for oil and gas well casing plugging Resin material. The invention has high strength, good cementation and small volume change rate, and is not only suitable for leak plugging of casing damage in production wells, but also suitable for plugging of casing damage in fracturing of new wells and plugging of old fractures in old wells. The invention has low initial viscosity, and after shearing, the viscosity decreases, which is convenient for ground construction operation, and the viscosity is gradually increased to solidification after reaching the reservoir. The raw materials used in the invention are easy to obtain, the preparation process is simple, and the construction process is simple and easy.
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Description

technical field

[0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a resin material for leakage plugging of oil and gas well casings and a preparation method thereof. Background technique

[0002] With the increase of the production life of multi-layer oilfields, coupled with the influence of geological conditions and engineering factors, casing damage and leakage of fluid outside the casing often occur, which affects the stable production of the oilfield and the smooth implementation of the development plan, and even causes production shutdown, seriously affecting It improves the effective water injection and ultimate recovery of the reservoir. Casing deformation of oil and water wells is aggravated, which increases the cost of workover and production operations. At present, the commonly used channeling and leakage sealing technologies mainly include casing subsidy and chemical leakage sealing. Casing subsidy techno...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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