Intelligent layered mining system applicable to offshore oilfield sand control well completion

Abstract

The invention discloses an intelligent layered mining system applicable to offshore oilfield sand control well completion. The intelligent layered mining system comprises a well mouth Christmas tree, an underground safety valve, a cable-passing packer, a Y connector, a holed pipe, a cable-passing positioning seal, a first intelligent bottom-hole regulator, a first cable-passing insertion seal, a second intelligent bottom-hole regulator, a second able-passing insertion seal, a third intelligent bottom-hole regulator and a round plug which are connected through oil pipes, wherein the cable-passing packer is provided with an air vent valve and a cable passing device, the Y connector is connected with an electric submersible pump unit, the electric submersible pump unit is connected with an electric submersible pump control system, and the first intelligent bottom-hole regulator, the second intelligent bottom-hole regulator and the third intelligent bottom-hole regulator are all connected to a ground controller. The intelligent layered mining system can achieve oil well water finding, layered testing, water plugging, layered mining and other purposes through one-time operation, can conduct real-time monitoring and real-time control on single-layer flow, water content, pressure, temperature and other underground parameters, achieves low-cost and efficiency oilfield development and is applicable to offshore oilfield sand control well completion.

Description

technical field [0001] The invention belongs to the technical field of intelligent stratified development of offshore oilfields, and more specifically relates to an intelligent stratified exploitation system suitable for sand control and well completion in offshore oilfields. Background technique [0002] As the development of Bohai Oilfield enters the stage of high water cut, some oil layers with low water cut and low permeability cannot be exploited normally. In order to solve these problems, it is necessary to implement measures such as water search, layer test, water shutoff, and layer development of oil wells. The Bohai Oilfield mainly develops highly deviated wells and horizontal wells. The oil wells are completed by layered sand control. Sliding sleeve control, water plugging, layer testing, and layer adjustment production need to be operated through steel wire or cable. The construction is cumbersome, the well occupation period is long, the operation cost is high, an...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an intelligent layered production system suitable for sand control and well completion in offshore oil fields. Composed of ground measurement and adjustment control system, one operation can realize the purpose of oil well water search, layer test, water plugging, layer mining, etc., without steel wire or cable operation, and can control downhole parameters such as single layer flow rate, water content, pressure, temperature, etc. Real-time monitoring and real-time control overcome the shortcomings of the original process, such as cumbersome construction, long well occupation period, high operating cost, low operating efficiency, and inability to monitor and control downhole parameters in real time, so as to realize low-cost and high-efficiency oilfield development

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