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Fuzzy control-based oil well paraffin removal method

A fuzzy control and fuzzy technology, applied in the direction of self-adaptive control, general control system, control/regulation system, etc., can solve the problems of tubing wear, poor accuracy, and high cost, so as to improve oil production and well cleaning. The effect of efficiency

Active Publication Date: 2018-11-23
RENQIU NORTH CHINA OILFIELD RELIANCE IND
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Problems solved by technology

However, after waxing in oil wells in the current oil production field, wax removal only depends on manual experience to judge whether the wax removal is complete, which is highly subjective, poor in accuracy, low in efficiency, and high in cost. energy consumption, accelerating the wear of the oil rod tube

Method used

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  • Fuzzy control-based oil well paraffin removal method
  • Fuzzy control-based oil well paraffin removal method
  • Fuzzy control-based oil well paraffin removal method

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Embodiment Construction

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0055] The object of the present invention is to provide a fuzzy control-based wax removal method and system for oil wells, so as to realize high-efficiency well cleaning, increase production, and reduce oil production energy consumption.

[0056] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings a...

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Abstract

The invention discloses a fuzzy control-based oil well paraffin removal method and system. The method includes the following steps that: input variables are determined, wherein the input variables comprise a paraffin precipitation deviation value and a time deviation value; and the input variables are fuzzified with a language variable, so that fuzzy input variables are obtained; the fuzzy input variables are inputted into a fuzzy controller, a fuzzy vector is determined according to a fuzzy control rule; the fuzzy vector is defuzzicated, so that a fuzzy output quantity can be obtained; and the second-stage-fire time and three-stage fire time of oil well paraffin removal are determined according to the fuzzy output quantity and on the basis of a second-stage-fire time adjustment rule anda three-stage fire time adjustment rule. With the method and system of the invention adopted, high-efficiency well washing can be realized, yield can be increased, and oil extraction energy consumption can be reduced.

Description

technical field [0001] The invention relates to the field of oil well wax deposition cleaning, in particular to a method for oil well wax removal based on fuzzy control. Background technique [0002] Crude oil contains different amounts of paraffin, which is generally in a dissolved state under the conditions of the oil reservoir. When the crude oil rises from the bottom of the well and flows through the oil pipe, the temperature and pressure gradually decrease, and the wax gradually precipitates, accumulates, and accumulates on the pipe wall, which is called oil well waxing. It makes the inner diameter of the oil pipe smaller, so that it is blocked, which affects the production capacity of the well, and in severe cases, the oil well stops production. For oil wells in different oil fields and reservoirs, due to differences in crude oil properties and wax content, temperature and pressure, flow conditions and tubing surface conditions, the positions where wax deposition begi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/02E21B37/00
CPCE21B37/00G05B13/024
Inventor 张瑞
Owner RENQIU NORTH CHINA OILFIELD RELIANCE IND
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