Chemical energy-increasing high-efficiency discharge aiding agent and preparation method and use method thereof

Abstract

The invention discloses a chemical energy-increasing high-efficiency discharge aiding agent and a preparation method and a use method thereof and belongs to the field of oil exploitation. The chemicalenergy-increasing high-efficiency discharge aiding agent is prepared from a cationic surface active agent, a fluorocarbon surface active agent and an energy producing chemical agent, wherein a mass ratio of the cationic surface active agent to the fluorocarbon surface active agent to the energy producing chemical agent is (6 to 8) to (1 to 1.6) to 1; the energy producing chemical agent is a mixture of compound A and compound B; the compound A is ammonium bioxalate, ammonium oxalate, ammonium chlorate, hydrogen peroxide or ammonium chloride; the compound B is potassium nitrite. The discharge aiding agent can generate a lot of gas to improve flowback energy of a fracturing and gel breaking solution, promote high-efficiency flowback of the fracturing and gel breaking solution, reduce fracturing solution adhesion damage and is suitable for being applied to a compact oil reservoir oil well fracturing and production increasing technology to promote the flowback of fracturing and gel breaking solution. The preparation method comprises the steps: taking the cationic surface active agent, the fluorocarbon surface active agent and the energy producing chemical agent; mixing; fully and evenly stirring to prepare the chemical energy-increasing high-efficiency discharge aiding agent. The method is simple, and the utilized raw materials are easy to obtain.

Description

technical field [0001] The invention belongs to the field of petroleum exploitation, and relates to a chemical energy-enhancing and high-efficiency drainage aid suitable for oil well fracturing stimulation in tight oil reservoirs, a preparation method and a use method thereof. Background technique [0002] Hydraulic fracturing has become more and more important as a technical measure for oil and gas stimulation. The incomplete gel breaking of fracturing fluid will increase the viscosity of the gel breaking fluid, resulting in a sharp drop in the flowback rate. The gel breaking fluid remaining in the formation will block the rock pores and sand filling fractures, causing formation damage. Therefore, it is necessary to increase the flowback rate of fracturing fluid as much as possible to reduce the damage of fracturing fluid viscosity to oil and gas conductivity. [0003] Commonly used drainage aids use cationic surfactants, anionic surfactants, amphoteric surfactants and non...

AI Technical Summary

Problems solved by technology

It can reduce the capillary force in the formation, but it also has poor flowback effect in tight low-pressure reservoirs

Images