Skid-mounted gas injection device

Abstract

The invention discloses a skid-mounted gas injection device, which comprises a carbon dioxide storage tank, a liquid feeding pump, a pressure injection pump and a heating pipeline, wherein the carbondioxide storage tank comprises a vehicle filling gaseous phase pipe, a vehicle filling liquid phase pipe and a liquid feeding pump liquid inlet pipe, the vehicle filling gaseous phase pipe and the vehicle filling liquid phase pipe are connected with an external mobile tank vehicle, the liquid feeding pump liquid inlet pipe is connected with a liquid feeding pump, a liquid feeding pump liquid outlet pipe is arranged between the liquid feeding pump and the pressure injection pump, a pressure injection pump liquid outlet pipe is arranged between the pressure injection pump and the heating pipeline, the heating pipeline is connected with a pressure-relief injection well, and the carbon dioxide storage tank, the liquid feeding pump, the pressure injection pump and the heating pipeline are arranged on a skid carrier. Through arranging the carbon dioxide storage tank, the liquid feeding pump, the pressure injection pump and the heating pipeline on the skid carrier, the skid-mounted gas injection device is convenient to use and flexible to move, saves the construction of a gas injection room and reduces the cost; and the heating pipeline is arranged for rising the temperature of the carbondioxide at an outlet of the pressure injection pump, thereby avoiding shrinkage and fracture of the downhole oil casing tubular column, and ensuring safe production.

Description

technical field [0001] The invention relates to the field of gas injection, in particular to a skid-mounted gas injection device. Background technique [0002] More than 93% of oilfields in my country are developed by water injection, but the recovery rate of water flooding can only reach about 40%. Long-term large-scale water injection production has made my country's main old oilfields generally enter a stage of high water cut, so it must be coordinated with other oilfields. Enhanced oil recovery methods. Carbon dioxide not only has good miscibility with crude oil, but also can significantly reduce the viscosity of crude oil. After the viscosity of crude oil is reduced, the flow capacity of crude oil increases and the output of crude oil is increased. It can also expand the volume of crude oil, increase the internal function of crude oil, and improve the oil displacement capacity , so injecting carbon dioxide into the oil layer can increase the oil recovery rate of the oil...

AI Technical Summary

Problems solved by technology

However, the current gas injection facilities are cumbersome to construct, the equipment is huge, cannot be moved flexibly, and the gas injection efficiency is low

Images