Patent · US Active

Preparation method of a wettability reversal agent

US9296936B1 · kind B1 · utility

5Cited by

1References

6Claims

0Family size

Assignee

China University of Petroleum—Beijing · CN

Inventors

Guancheng Jiang · Beijing, CN
Yang Xuan · Beijing, CN
Xi Wang · Beijing, CN
Shuo Zhang · Oettingen, DE
Yuxiu An · Beijing, CN
Jinsheng Sun · Qingdao, CN

Key dates

Filing date	Sep 22, 2015
Grant date	Mar 29, 2016
Priority date	—
Expiry date	Sep 22, 2035

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F220/1804
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present subject matter relates to a preparation method of a wettability reversal agent, comprising: (1) adding an emulsifier into water to prepare a mixed solution of emulsifier; (2) adding compounds represented by formula (1-a), (2-a), (3-a), (4-a), (5-a), and (6-a) to the mixed solution of emulsifier to obtain a pre-emulsion, adding an initiator, and initiating a polymerization reaction. When the wettability reversal agent and reservoir protecting agent composition disclosed in the present subject matter are used in a drilling fluid, they can effectively prevent the permeation of the water phase and oil phase in the drilling fluid into the reservoir, reduce the filter loss of the drilling fluid, and thereby effectively protect the reservoir against damages from the drilling fluid.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.