A bottom well multi-stage flow control valve

Abstract

The invention discloses a well bottom multi-stage split flow control water valve, which comprises a valve cover (1) and a valve body (2), and the valve body (2) is provided with two liquid inlets (3) and three liquid outlets (8,11,12), and offer main flow channel (4), branch flow channel (5) and split flow channel (6,7,9,10) on the surface. The invention does not contain moving parts, and through the design of pre-divided flow channels and multi-stage divided flow channels, the difference in the characteristics of different fluids is used to realize the flow restriction of specific fluids. Its beneficial effect is: as a protective development device for oil and gas reservoirs, it can effectively increase the diversion effect, increase the pressure drop of water flow, and realize oil increase control in solving the heterogeneity problems existing in edge / bottom water reservoirs and horizontal wells. Water plays a huge advantage and potential in strengthening oil and gas reservoir management and protective development.

Description

technical field [0001] The invention relates to a water control tool used for oil exploitation in the technical field of oil and gas field development, in particular to a well bottom multi-stage flow control valve. The series of water diversion control valves can at least be used to improve the water control capability of horizontal wells in reservoirs. Background technique [0002] The edge / bottom water reservoirs in major oilfields in my country are widely distributed and have large reserves. However, the edge / bottom water continuously advances to the wellbore non-uniformly during the production process, and even breaks through into the wellbore, which leads to the early water breakthrough time of the oil well and the waterless oil production period. It is greatly shortened, and the reservoir development effect becomes worse. [0003] As the most important way to develop oil and gas reservoirs, especially unconventional oil and gas reservoirs, horizontal wells can achieve ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantage that the existing AICD cannot effectively increase the effect of oil-water diversion, and the water flow pressure still decreases after increasing the diversion, and provides a multi-stage diversion control water valve at the bottom of the well, which can combine the advantages of the current intelligent water control technology for horizontal wells , to further effectively solve the problems of side / bottom water ridges in edge / bottom water reservoirs and horizontal wells being greatly affected by reservoir heterogeneity, increase water control effect through multi-stage diversion, and increase water flow pressure after diversion reduce, and maximize the potential of intelligent water control technology as a protective development technology

Images