Preparation method of high-load long-acting slow-release scale inhibition particles

Abstract

The invention discloses a preparation method of high-load long-acting slow-release scale inhibition particles, and belongs to the field of oilfield chemistry. A scale inhibitor and an inorganic nano-carrier serving as one of slow-release components are assembled into a homogeneous whole in the form of a solid solution, and the homogeneous whole is coated with a layer of controllable swelling polymer. When the polymer swells in an environmental medium, the scale inhibitor is slowly released. A dual-release control mechanism of polymer swelling and desorption of the scale inhibitor from the inorganic nano-carrier is utilized, so that the scale inhibitor is slowly released in the wellbore, and the protection effect on the wellbore is prolonged.

Description

technical field

[0001] The invention belongs to the field of oilfield chemistry, and relates to downhole environmental scale inhibitor materials for oil and gas wells, in particular to a high-load long-acting slow-release scale inhibitor granular material. Background technique

[0002] Scaling phenomenon in oilfield well water is an important problem that needs to be solved urgently in the process of oilfield development. Scaling will cause blockage and corrosion of injection, production and flooding system equipment, and reduce oil recovery efficiency.

[0003] In order to solve the scaling problem, the liquid antiscalant is usually directly injected downhole from the wellhead, so as to prevent the formation of scale and prolong the service life of the equipment. The liquid antiscalant will stick to the pipe wall during the injection process, and part of the antiscalant injected downhole will be lost with the production fluid. It needs to be injected repeatedly to ensure th...

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