Preparation and Performance of an Oil-Soluble Polyethylene Wax Particles Temporary Plugging Agent

Abstract

In order to solve the problem of low strength, low permeability recovery rate, and narrow suitable temperature range of the oil-soluble temporary plugging agent, the idea of preparing the oil-soluble polyethylene wax particles temporary plugging agent (OPPTA) using polyethylene wax as the main raw material was proposed. Emulsifier and stabilizer were selected, and the dosage of emulsifier, stabilizer, and stirring speed was optimized. The method for preparing OPPTA was formed. The temporary plugging performance of OPPTA for the natural core was studied. The plugging rate and the recovery rate of core permeability after plugging removal of OPPTA were 99.9% and 90.1%, respectively. The temporary plugging performance of OPPTA was better than that of a conventional oil soluble temporary plugging agent W-11.

Preparation of MOF-Based Core-Shell Gel Particles with Catalytic Activity and Their Plugging Performance

“…Moreover, deep formations contain a high proportion of hard, brittle rocks. If the plugging agent fails to effectively block the seepage channels in the formation, it is likely to cause wellbore instability and landslide, as well as drilling sticking and burial, which impedes the progress of drilling operations [4][5][6][7].…”

Experimental Evaluation of the Shielded Temporary Plugging System Composed of Calcium Carbonate and Acid-Soluble Preformed Particle Gels (ASPPG) for Petroleum Drilling

“…10 At present, the common deformable particles in shielded temporary plugging drilling operations include softened particles such as acid-soluble fibers, 11 sulfonated asphalt, 12,13 and emulsified asphalt, 14 and deformable particles such as oilsoluble resin. 15 Kang et al 16 system containing 5.0% rigid granule, 3.0% fiber, and 2.5% elastic particle. Results showed that the reasonable combination of rigid granule, fiber, and elastic particle could create a synergy effect that makes the plugging stronger.…”

“…At present, the common deformable particles in shielded temporary plugging drilling operations include softened particles such as acid-soluble fibers, sulfonated asphalt, , and emulsified asphalt, and deformable particles such as oil-soluble resin . Kang et al developed a temporary plugging system containing 5.0% rigid granule, 3.0% fiber, and 2.5% elastic particle.…”