Oil film dispersion polymerization gel particle controlling-flooding-plugging agent and synthetic technology thereof

Abstract

The invention discloses an oil film dispersion polymerization gel particle controlling-flooding-plugging agent and a synthetic technology thereof. The synthetic technology comprises the following steps: firstly adding acrylamide, sodium acrylate, a functional monomer and deionized water to a reaction device and preparing monomer mixed water solution, after adjusting a pH value, adding a cross-linking agent and an initiator, and performing polymerization; while a polymerization reaction reaches an acceleration period, enabling the monomer mixed water solution to be turned into non-Newtonian fluid in a semi-gel state, performing stretchability cutting on the non-Newtonian fluid in the semi-gel state by using stirring tension; coating cut gel particles by an oil film through using an oil filmdispersing agent, and avoiding mutual adhesion between the particles; after that, continuously performing the polymerization reaction in a low-speed stirring state, and ending the reaction while a reaction temperature is risen to 80-90 DEG C; and adding the diluent oil film dispersing agent to form a solid-liquid mixed phase, screening out finished products in different particle sizes through a solid-liquid separation sieve, and recovering the oil film dispersing agent. The synthetic technology is a new-type gel particle synthetic technology, safe and environment-friendly, and capable of greatly reducing a dosage of oil and a surfactant.

Description

technical field [0001] The invention belongs to the technical field of control and displacement agents for oil fields, and in particular relates to a control and displacement plugging agent for oil film dispersed polymer gel particles and a synthesis process thereof. Background technique [0002] With the development of the world economy and industry, the human demand for oil is also increasing. Due to the large-scale concentrated exploitation of oil in recent decades, the oilfield blocks with good reservoir geological conditions and low exploitation cost are close to depletion, and many oilfields have entered the period of high and ultra-high water cut, with low development efficiency and high exploitation cost. Reservoir conditions are poor and heterogeneity is serious. At present, because new energy cannot completely replace traditional energy, some oilfields with poor reservoir conditions, such as the Middle East reservoir, have a permeability ranging from 0.001 to 5 Da...

AI Technical Summary

Problems solved by technology

[0003] The production process of dry powder gel particle control and displacement plugging agent is complicated, the equipment investment is large, the process is cumbersome, the equipment investment cost and energy consumption loss of drying and crushing in the later stage is large, and the particles with small particle size are extremely difficult to recover during crushing and screening. Easy to cause dust pollution

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