Environmentally-friendly low-fluorescence plugging agent used for drilling fluids, and preparation method thereof

Abstract

The invention belongs to the field of additives for drilling fluids, and concretely discloses an environmentally-friendly low-fluorescence plugging agent used for drilling fluids, and a preparation method thereof. The plugging agent is prepared from, by weight, 35-45 parts of C1618 fatty alcohol, 40-45 parts of stearic acid, 2-6 parts of polyethylene glycol, 0.5-1.5 parts of p-toluenesulfonic acid, 0.5-1.5 parts of alkylphenol polyoxyethylene, 10-16 parts of lightweight CaCO3 and 10-15 parts of cotton fibers. The plugging agent has the advantages of low fluorescence grade, biodegradability, facilitation of environmental protection, and integration of the excellent plugging and anti-sloughing performances and the oil reservoir protection effect of an asphalt product.

Description

technical field

[0001] The invention belongs to the field of additives for drilling fluids, in particular to an environment-friendly fluorescent plugging agent for drilling fluids and a preparation method thereof. Background technique

[0002] Although asphalt, paraffin, and polymeric alcohol plugging agents have been developed in the existing drilling fluid technology, they have good plugging effects under certain conditions, but the asphalt has a high fluorescence level and is limited to production wells in areas with low environmental protection requirements Practical, but paraffins and polyalcohols are prone to bubbles and cause a significant increase in the viscosity of drilling fluids, which cannot meet the needs of anti-slump drilling fluids. Therefore, it is urgent to develop a new type of plugging agent for drilling fluid, which has low fluorescence intensity, good plugging performance at high temperature, no viscosity increase and no thickening, and can be used in ...

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