Binary flooding produced liquid comprehensive treatment agent and preparation method

Abstract

The invention relates to a binary flooding produced liquid comprehensive treatment agent and a preparation method. The binary flooding produced liquid comprehensive treatment agent comprises a demulsifier, a water purifying agent and a comprehensive treatment agent compounded by the demulsifier and the water purifying agent. The preparation method comprises the following steps that the demulsifier and the water purifying agent are firstly synthesized and then are compounded to form the binary flooding produced liquid comprehensive treatment agent. The demulsification problem of binary flooding produced W / O and O / W emulsion in oilfield is successfully solved, the demulsification effect is obvious, the transported sewage and the transported crude oil reach the required index, and polymer-bearing sludge is not generated in the demulsification process, thereby laying the foundation for polymer-bearing crude oil dehydration, standard reaching of polymer-bearing sewage treatment and wide use of polymer flooding technology.

Description

technical field [0001] The invention relates to an oilfield binary flooding production fluid comprehensive treatment agent and a preparation method. Background technique [0002] Most of China's onshore mature oilfields are currently in a period of high water cut or extremely high water cut, and conventional water injection development technology is difficult to slow down production decline. Chemical composite flooding is one of the main methods to greatly enhance oil recovery. Among them, the popularization and application of binary compound flooding has achieved obvious oil-increasing effect. Binary compound flooding refers to increasing the viscosity of the displacement fluid by adding polymers to the water to improve the sweeping efficiency; at the same time relying on the role of surfactants to reduce the oil-water interfacial tension, change the wettability, and emulsify crude oil to improve the oil displacement efficiency. Its essence is to give full play to the vis...

AI Technical Summary

Problems solved by technology

The demulsifier used in the station is used to treat the crude oil produced by binary flooding, and the dehydration effect is not good. The three-phase separator has high water content in the oil separation, and the water content in the exported oil exceeds the standard. Aging oil, causing the recovery of dirty oil to affect the dehydration of crude oil, and sludge clogging the gathering and transportation system, etc.