A kind of self-aggregation and consolidation anti-pressure and permeation-increasing temperature-resistant sand control agent

Abstract

The invention discloses a self-aggregation, anti-pressure, permeation, and temperature-resistant sand control agent, which comprises the following components: a resin compound system, a coupling agent, an organic solvent, an emulsifier, a filler and a curing agent; the mass of each component is 100%. The content is as follows: resin compound system 30-40%; organic solvent 40-50%; coupling agent 5-7%; filler 5-8%; curing agent 4-5% and emulsifier 5-8%, each group The sum of the mass percentages of points is 100%. The curing agent is equal-mass mixed p-nitrobenzoic anhydride and tetrachlorophthalic anhydride; the filler is high-temperature-resistant multi-mineral fine powder and phenolic fiber; the high-temperature-resistant multi-mineral fine powder is magnesium oxide, aluminum oxide, silicon oxide mixture. The resin compounding system is composed of epoxy resin E‑44, epoxy resin E‑51, phenolic resin F‑51 and polyvinylpyrrolidone compounded with K30. The sand control agent of the present invention is mainly used for chemical sand control of high-temperature and high-pressure wells, and can be injected into formations without moving pipe strings to achieve the purpose of sand control and sand consolidation.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a self-agglomeration, consolidation, pressure-resistant, permeability-increasing, temperature-resistant and sand-controlling agent for chemical sand control in high-temperature and high-pressure wells. Background technique [0002] In oil extraction, sand production from oil and water wells is extremely harmful. If sand buries oil, gas, and water layers, the production of oil and gas wells will be stopped, and the injection of water wells will be stopped. Downhole operations, equipment maintenance or replacement will be frequent, and production costs will increase. If a large amount of sand is produced, the formation will be seriously deficient, and cavities will easily form outside the casing of the reservoir, causing formation collapse, casing rupture and deformation, and even the well being scrapped. Therefore, sand control for sand production wells is th...

AI Technical Summary

Problems solved by technology

However, the traditional chemical sand control agent is only suitable for sand control operations in medium and low temperature reservoirs due to its low curing temperature and fast curing speed, and the resulting consolidated body has poor temperature resistance and low compressive strength.

The use of acid anhydride sand curing agent can improve the temperature resistance of the resin. However, due to the high melting point of the traditional acid anhydride curing agent, it is mostly in a solid state at room temperature, which brings certain difficulties to on-site operations. During operation, the resin consolidation speed is too fast under high temperature conditions, and the risk of sand control agent curing before entering the target layer is likely to occur, thus affecting the effect of sand control and sand consolidation

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