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Neutral non-flowback circular scale-removing technological process suitable for ternary combination flooding rod pumping well

An oil pumping well and ternary compound technology, applied in the ternary field, can solve the problems of static scale cleaning agent without convection, excess and uneven reaction agent, low acid scale reaction efficiency, etc., so as to accelerate the scale dissolution reaction process and improve the contact Reaction efficiency, the effect of improving the utilization rate of the agent

Active Publication Date: 2019-02-15
PETROCHINA CO LTD +1
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Problems solved by technology

[0004] The invention provides an applicable method for solving the problems of low acid scale reaction efficiency, long reaction period, static scale cleaning agent without convection, idle active acid, and uneven surplus of reaction agents existing in the existing ternary oil well neutral scale cleaning static immersion construction process. Neutral non-flowback cycle cleaning process for ASP flooding pumping wells

Method used

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  • Neutral non-flowback circular scale-removing technological process suitable for ternary combination flooding rod pumping well

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specific Embodiment approach

[0024] Specific embodiments: The present invention will be further described below in conjunction with the accompanying drawings: it consists of a high-pressure injection pipeline 1, a pressure monitoring joint 2, a three-way controller circulation joint 3, a high-pressure hose 4, an oil pipe venting valve 5, an oil pipe production valve 6, a sleeve Tube vent valve 7, three-way controller 8, sampling vent valve 9, and circulation interface valve 10; the casing vent valve 7 is connected to the three-way controller 8, and the three-way controller is connected to the oil pipe through high-pressure hose 4 through 8 Vent valve 5, a neutral non-flowback cycle cleaning process suitable for ASP flooding pumping wells, is realized through the following steps:

[0025] a. Pumping unit shut down

[0026] If it is judged that the well uses an open pump, stop the donkey head to the top dead point; if a conventional plunger pump is used, stop the donkey head to the bottom dead point, open t...

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Abstract

The invention relates to the technical field of oil extraction of oil fields and belongs to a neutral non-flowback circular scale-removing technological process suitable for a ternary combination flooding rod pumping well. The problems that in the static soaking construction technological process adopted for conventional neutral scale-removing of the ternary combination flooding rod pumping well,the reaction period is long, and a pump is prone to being stuck due to falling-off of scale in the reaction process are mainly solved. According to the neutral non-flowback circular scale-removing technological process, by judging different pump types of the to-be-executed rod pumping well, different thermal washing and agent injection shutdown positions are selected, an oil well production valveand a casing emptying valve are connected through a high-pressure water hose, thus a circular scale-removing channel is built, mechanical lift of the rod pumping well drives a neutral scale-removing agent in an oil sleeve annular space to move circularly, and thus dynamic circular scale-removing is achieved. The neutral non-flowback circular scale-removing technological process has the advantagesthat the acid scale contact reaction efficiency is improved, the reaction time is shortened, the production time rate of the oil well is guaranteed, and the probability that the scale falls off and consequently, the pump is stuck is decreased.

Description

technical field [0001] The invention relates to the technical field of oil recovery in oil fields, and belongs to a ternary [0002] Neutral non-flowback cycle cleaning process for compound flooding pumping wells. Background technique [0003] The ASP flooding technology has been applied on a large scale in Daqing Oilfield, and has achieved an effect of more than 20 percentage points higher recovery than water flooding, accumulatively increasing oil production by 24.56 million tons and creating an output value of 75.8 billion yuan. With the popularization and application of flooding technology, the scaling problem of production wells has become increasingly prominent. In order to solve the scaling problem and cope with the current severe environmental protection situation, a neutral scale cleaning technology for ASP flooding wells has been developed. Scale removal construction adopts the method of static immersion and stuffy well reaction. The acid scale reaction efficiency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B37/06
CPCE21B37/06
Inventor 周万富郭红光王锐刘向斌王庆国王鑫杨春城张爽管公帅
Owner PETROCHINA CO LTD
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