Layered polymer injection distributor, polymer intelligent layered injection system and application

Abstract

The invention provides a layered polymer injection distributor, a polymer intelligent layered injection system and an application. The polymer intelligent layered injection system involves a polymer intelligent layered injection pipe column and a ground control box; and the polymer intelligent layered injection pipe column comprises an oil pipe, a plurality of packers and a plurality of layered polymer injection distributors, wherein the packers and the layered polymer injection distributors are alternately arranged on the oil pipe, and the plurality of packers and the plurality of layered polymer injection distributors are connected with the ground control box through cables. In the process of carrying out polymer flooding intelligent layered injection by using the layered polymer injection distributors and the polymer intelligent layered injection system, a work vehicle is not needed, real-time monitoring and intelligent control of the down-hole injection pressure and flow parametersof a polymer layered injection well can be realized, the layered injection qualification rate can be guaranteed for a long time, the adjustment time of the single-well flow can be reduced, the operation amount is reduced, and the operation cost is reduced.

Description

technical field [0001] The invention relates to a dispensing device for layered polymer injection, an intelligent polymer dispensing system and its application, and belongs to the technical field of polymer dispensing in oil production engineering. Background technique [0002] As my country's onshore oilfields have entered the late stage of development, polymer flooding technology has been promoted and applied in 22 oilfields in my country. At present, polymer injection mainly adopts concentric injection technology, eccentric injection technology and high-efficiency measurement and adjustment technology. and eccentric separate injection technology; Tang Jundong discussed the high-efficiency measurement and adjustment technology of polymer flooding in the conference paper "Direct-reading Electric Measurement and Adjustment Technology for Polymer Flooding Separate Injection Wells". [0003] With the increase in the number of polymer injection wells, in order to improve the q...

AI Technical Summary

Problems solved by technology

[0003] With the increase in the number of polymer injection wells, in order to improve the qualified rate of injection, the above three technologies are faced with a substantial increase in testing workload, an increase in the number of testing teams, an increase in the cost of injection, and the lack of test data, which cannot be used for a long time. Guaranteed dispensing pass rate and other issues

Like the concentric dispensing process and the eccentric dispensing process, in order to achieve single-layer flow regulation, wire fishing operations are required. In order to ensure the pass rate of dispensing in a single test, it is necessary to use the "try and make" method to repeatedly throw and fish to reduce flow The testing efficiency is low; the high-efficiency measurement and adjustment technology solves the problem of steel wire throwing and fishing, without replacing the choke core, and realizes that the cable testing instrument can complete the whole well measurement and adjustment in one downhole, and the testing efficiency is high. However, due to It is necessary to use the cable test under the operation vehicle, and the amount of downhole pressure and flow monitoring data is small, and it is still impossible to guarantee the pass rate of dispensing for a long time

[0004] In terms of polymer dispensers, Chinese utility model patent CN2861479Y discloses a polymer eccentric dispenser with a shuttle rod, and Chinese utility model patent CN2565984Y discloses a polymer stacked ball eccentric dispenser, China The utility model patent CN2565983Y discloses a polymer hammer type eccentric dispenser and the Chinese utility model patent CN2565982Y discloses a polymer variable-diameter eccentric dispenser, which can effectively reduce polymer shear and ensure injection The viscosity of the polymer, but when it is applied to the high-efficiency measurement and adjustment technology of polymer injection, the formation of the throttle core is relatively large, and the linkage adjustment time is long. When there are many layers in the polymer injection well, the flow test time is long and the efficiency is low.

Images