Method and system for measuring movable liquid surface of oil well

Abstract

The embodiment of the invention provides a method and a system for measuring a movable liquid surface of an oil well. Due to the adoption of a load sensor arranged on a well mouth beam hanger and a displacement sensor on the lower side of a walking beam of an oil pumping machine, the load and the displacement of a well oil pumping rod of the oil pumping machine can be measured, and a load and time curve and a displacement and time curve can be collected and acquired; a polish rod indicating diagram is acquired through the load and time curve and the displacement and time curve; a pump diagram is acquired according to the acquired polish rod indicating diagram; and by technical means for acquiring the depth of the movable liquid surface of the oil well through the pump diagram, the method and the system has the advantages that an effective scheme for continuously monitoring the movable liquid surface in real time at low cost is provided, a working mode that workers test the movable liquid surface of a mechanical recovering well on site is changed, the problems of long period, high labor intensity and low instantaneous test value representativeness of onsite operation are solved, and the aims of acquiring the movable liquid surface in real time at low cost, coordinating supply and drainage relationships and improving the production efficiency of the oil well are fulfilled.

Description

technical field [0001] The invention relates to the technical field of oil recovery in oil fields, in particular to a method and system for measuring the fluid level of an oil well. Background technique [0002] The dynamic liquid level data of the oil well directly reflects the liquid supply situation of the formation and the downhole supply and drainage relationship, and is an important basis for evaluating and optimizing the adaptability of the oil production process. At present, there are many types of equipment for dynamic liquid level testing, the most common of which are: [0003] The echo meter is composed of acoustic elastic type, nitrogen type wellhead connector and comprehensive tester. This equipment mainly uses the principle of echo to detect the liquid level. It needs to be manually tested well by well. The workload is heavy, the timeliness is poor, and there are potential safety hazards. [0004] The working principle of the wellhead tester is the same as tha...

AI Technical Summary

Problems solved by technology

It can realize automatic, real-time and continuous monitoring of the dynamic liquid level. The disadvantage is that the well site needs to add equipment, which is costly and is not conducive to large-scale application

[0005] Optical fiber downhole testing of dynamic liquid level, the most direct method, is currently in the experimental stage, and the equipment is expensive

[0006] In the process of realizing the present invention, the inventors have found that there are at least the following problems in the prior art: At present, there is a lack of an effective real-time and continuous monitoring solution for the dynamic liquid surface at a relatively low cost

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