Sieve tube with flow adjuster

Abstract

A sieving pipe used for the heterogenous multi-layer oil deposit to pack multiple segments in oil well has the flow controllers in it and the fluid collecting holes relative to said flow controllers, which can control the fluid to flow from strate into the sieving pipe or inject the fluid from sieving pipe into strata.

Description

Technical field: [0001] The invention relates to a screen with a flow control device, in particular to a screen with a partitioned flow control function suitable for oil and gas wells in heterogeneous and multi-layered oil reservoirs, and belongs to the technical field of oil and gas exploitation. Background technique: [0002] Many oil fields have heterogeneous, multi-layered sandstone reservoirs, and each oil layer has great differences between layers, planes and layers. In particular, there are large differences in permeability between layers, and these differences have a great impact on the development effect of the reservoir. In the mining process, different development layers need to be distinguished. Each well needs to be produced in several or more than a dozen small layers. For this kind of multi-layered oil reservoir, during the development process, it is necessary to control the flow status of different sections according to the injection and production at different po...

AI Technical Summary

Problems solved by technology

[0011] 1. The number of layers sealed by the packer is limited. When there are more than four isolation areas to be separated, the separation operation is very difficult

[0012] 2. Due to the limited number of isolation areas sealed by packers, a single isolation area is relatively long. There may be oil, gas, and water producing layers in the same isolation area, and multi-phase fluids are mixed. The development of

[0013] 3. When it is necessary to adjust the isolation section, all the pipe strings must be taken out from the oil and gas well before the position of the packer can be adjusted. The workload is heavy and the operation is complicated

[0014] 4. In oil and gas wells with damaged or deformed casing, the packer cannot be used

[0015] 5. Due to the relatively long distance of the isolation section, the phenomenon of fluid layer channeling will occur between the different layers included in the same isolation section due to the difference in pressure, that is, the fluid in some layers flows into other layers, Therefore, it will affect the oil production

[0016] In order to solve the above problems, a well completion system for oil and gas wells that regulates the flow of formation fluids or injection fluids in subdivided sections is currently proposed. A screen with a flow control function is required to be used in conjunction with it. However, the common screens currently used are all It does not have the function of flow regulation, and cannot individually control the fluid flow in and out of a certain section of the screen, nor can it meet the requirements of section flow state control

Images