Self-polymerized consolidated pressure-resistant permeation-increasing temperature-resistant sand preventing agent

Abstract

The invention discloses a self-polymerized consolidated pressure-resistant permeation-increasing temperature-resistant sand preventing agent. The self-polymerized consolidated pressure-resistant permeation-increasing temperature-resistant sand preventing agent comprises the following components, in percentage by mass: 30-40% of a resin compounding system; 40-50% of an organic solvent; 5-7% of a coupling agent; 5-8% of a filler; 4 to 5% of a curing agent, and 5 to 8% of an emulsifier; wherein the sum of the mass percentages of the components is 100%; the curing agent is p-nitrobenzoic anhydrideand tetrachlorophthalic anhydride which are mixed in equal mass; the filler is high-temperature-resistant multi-mineral fine powder and phenolic fiber; and the high-temperature-resistant multi-mineral fine powder is a mixture of magnesium oxide, aluminum oxide and silicon oxide; the resin compounding system is formed by compounding epoxy resin E-44, epoxy resin E-51, phenolic resin F-51 and polyvinylpyrrolidone K30. The sand preventing agent is mainly used for chemical sand control of high-temperature and high-pressure wells, can be injected into stratums without moving tubular columns, andachieve the purposes 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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