Heavy metallic mineral thermosetting resin coated sand, preparation method and application thereof

Abstract

The invention provides a heavy metallic mineral thermosetting resin coated sand, a preparation method and an application thereof. The heavy metallic mineral thermosetting resin coated sand contains heavy metallic mineral grains serving as a skeleton support material and thermosetting resin coating layers coated on the surfaces of the heavy metallic mineral grains, wherein the heavy metallic mineral grains are slags rich in copper oxide and silicon carbide; the thermosetting resin coating layers comprise a curing layer and a protecting layer from inner to outer; the curing layer is prepared from a thermosetting organic silicon modified phenolic resin, a thermosetting furan resin, a coupling reagent, a heat-resisting modifier and a blender; the protecting layer is a lubricant protecting layer. The heavy metallic mineral thermosetting resin coated sand is a sand control agent used for sand control technologies in the field of oil production engineering, serves as a heavy metallic mineraltype novel sand control agent with resistance to alkali steam corrosion at 350 DEG C and steam curing at above 120 DEG C, is capable of prolonging the guarantee period of sand control and is suitablefor sand control of thickened oil thermal recovery oil-water wells.

Description

technical field [0001] The invention relates to a heavy metal mineralization thermosetting resin-coated sand and a preparation method and application thereof, belonging to the technical field of oil well sand control in oil production engineering. Background technique [0002] Sand production in oil and water wells is a common problem in the development of unconsolidated sandstone reservoirs. Due to various comprehensive factors such as oil well exploitation and operation, the rock formation structure near the bottom of the well is damaged, resulting in part of the detached formation sand flowing into the wellbore together with the reservoir fluid, resulting in sand formation. Buried oil layer, wellbore and pipeline sand plugging, surface pipeline and oil storage tank sand accumulation; oil pump, plunger and other equipment abrasion; well wall collapse, casing deformation and damage. A series of hazards caused by sand production in oil wells not only increase the cost of cru...

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Problems solved by technology

However, in the investigation of the sand control effect of heavy oil steam huff and puff wells in Liaohe Oilfield, it was found that conventional fracturing sand control methods cannot maintain multiple rounds of steam huff and puff. worsening, the effective period of sand control is shortened, and the conventional coated sand is cured with hydrochloric acid, which will corrode the casing, affect the strength of the casing, and accelerate the damage of the casing

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