Efficient plugging agent for offshore oil exploitation and preparation method thereof

Abstract

The invention relates to the technical field of plugging agents, and particularly discloses an efficient plugging agent for offshore oil exploitation and a preparation method of thereof. The efficientplugging agent for offshore oil exploitation is mainly prepared from the following raw materials in parts by weight: 30-50 parts of plugging polymer, 20-30 parts of light calcium powder, 10-15 partsof calcium oxide and 2-5 parts of reinforced fibers. The plugging polymer is mainly prepared by mixing and reacting water, a polymeric monomer, a filler, a pore-forming agent and an initiator according to a weight ratio of 10-22: 8-10: 20-30: 0.5-1; the polymeric monomer comprises a polymeric monomer A and a polymeric monomer B, the polymeric monomer A is at least one of ethyl acrylate, acrylamideand Nhydroxymethyl acrylamide, and the polymeric monomer B is at least one of dimethyl diallyl ammonium chloride and octyl dimethyl allyl ammonium chloride. The high-efficiency plugging agent for offshore oil exploitation has relatively high pressure resistance and still has relatively high compressive strength at a low temperature.

Description

technical field [0001] The present application relates to the field of plugging agent technology, more specifically, to a high-efficiency plugging agent for offshore oil development and a preparation method thereof. Background technique [0002] In the process of oil extraction, as the oil and gas in the formation are extracted, the formation will be short-lived and large pores will appear, which will aggravate the leakage of the oil well and seriously affect the normal oil production operation. In order to ensure the smooth production of oil and gas resources, it is generally necessary to use a plugging agent (plugging agent) to chemically plug the leaking oil well. Plugging agents generally use oil well cement, inorganic fillers, and organic polymers. After being injected into the oil well, the plugging agent slurry accumulates, condenses, and solidifies when it flows to the leakage site to complete the plugging. For the plugging during offshore oil exploitation, the plug...