Layered oil production system integrating measurement, adjustment and production

Abstract

The invention relates to a layered oil production system integrating measurement, adjustment and production. The layered oil production system comprises a layered production allocation device, a measurement and adjustment device, a bailing oil production device and a control device; the layered production allocation device comprises packers used for dividing an underground oil layer into a plurality of target layers, the packers are communicated through lower oil pipes, and production allocators are installed on the target layers; the bailing oil production device comprises an upper oil pipe arranged above the lower oil pipes, a flexible continuous sucker rod is arranged in an inner cavity of the upper oil pipe, the lower end of the flexible continuous sucker rod is detachably connected with a swab, the lower end of the flexible continuous sucker rod is detachably connected with the measurement and adjustment device used in cooperation with the production allocators after the swab is detached, and the upper end of the flexible continuous sucker rod is connected with a bailing oil production machine; and the bailing oil production machine is further provided with the control device. According to the layered oil production system integrating measurement, adjustment and production, the layered oil production control level is effectively improved at low cost, the operation complexity and cost are reduced, and the problems that underground parameters are difficult to monitor and transmit are solved.

Description

technical field [0001] The invention relates to the field of oil recovery engineering in the petroleum industry, in particular to a layered oil recovery system integrating measurement, adjustment and production. Background technique [0002] Usually, oil wells will encounter many oil layers, and they will be developed in a multi-layered manner. Affected by the difference in oil layer physical properties, pressure, saturation, etc., as the oilfield development continues to deepen and the degree of recovery continues to increase, interlayer interference and development contradictions will become more and more serious. Problems such as increasingly prominent, in this regard, put forward layered oil recovery technology. Layer-by-layer oil production instead of general multi-layer combined production is an important means to effectively solve interlayer and plane conflicts, fully develop medium and low permeability reservoirs, reduce ineffective water circulation, realize remaini...

AI Technical Summary

Problems solved by technology

There are many control methods for the distribution device: mechanical direct contact control was applied earlier, and it needs to be operated in the ring space (easy to jam) or the pump is used to lift and lower the pipe string (longer time-consuming and higher operating cost); The water pressure control operation is a little simpler, but it needs water injection and pressure from the work vehicle, and the accuracy and reliability are poor; the motor control needs the wellhead to transmit signals to the downhole, and the vibration wave control method has certain similarities with the pressure wave control proration , needs to transmit signals, receive signals and encoders, the working life of the downhole electric control valve is limited by the battery life, the working life is short, it cannot achieve long-term effective regulation, and the replacement operation is complicated; the preset switch device allows the distributor to adjust The operation is fixed, unable to adapt to the needs of flexible adjustment, and the valve problem is the same as above; while the cable controls the motor (which can transmit information at the same time), the cable space is a ring space, which increases the complexity of downhole equipment, limits the scope of application for high requirements on well conditions, and once high sexual involvement

[0006] After the test is completed, the layered mining method is formulated according to the test information, and then the plan for adjusting the layered production is formulated. However, when the test signal is transmitted to the wellhead, there is basically the same problem as the adjustment of the production rationer: instead of using the operation test with high cost and complicated operation. If the downhole preset instrument is used for testing, the cable transmission signal problem is the same as the same downhole signal problem mentioned above, and other methods are more difficult to transmit signals from the downhole to the wellhead than the wellhead to the downhole

In short, the current layered oil recovery technology has major deficiencies in stability and reliability, equipment complexity, operation complexity, and cost control, resulting in low cost performance, low practicability, and insufficient wide application of layered oil recovery technology

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