Device and method for evaluating desulfurizing effect of desulfurizing agent

An evaluation method and technology of evaluation devices, which are applied to measurement devices, instruments, scientific instruments, etc., can solve the problems of poor reliability of evaluation results and inability to simulate the real flow conditions of wellbore, and achieve reliable evaluation results, improved reliability, and high measurement accuracy. Effect

Pending Publication Date: 2020-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for evaluating the desulfurization effect of a desulfurizer, thereby solving the problem of poor reliability of the evaluation results of the existing evaluation methods
[0008] The second object of the present invention is to provide a device for evaluating the desulfurization effect of a desulfurizer, so as to solve the problem that the existing evaluation devices cannot simulate the real flow conditions of the wellbore, resulting in poor reliability of the evaluation results

Method used

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  • Device and method for evaluating desulfurizing effect of desulfurizing agent
  • Device and method for evaluating desulfurizing effect of desulfurizing agent

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Embodiment 1

[0036] Embodiment 1 of the desulfurizing agent desulfurizing effect evaluation method of the present invention utilizes the desulfurizing agent desulfurizing effect evaluation device of the above embodiment to evaluate the desulfurizing effect of copper sulfate, comprising the following steps:

[0037] Prepare 150 kg of well killing fluid (the formula of well killing fluid is: 5wt% corrosion inhibitor, 2wt% fluid loss reducer, 1wt% surfactant and the remaining water), and add the prepared well killing fluid solution to the liquid distribution tank 4 40L hydrogen sulfide test gas (composed of hydrogen sulfide and air, the concentration of hydrogen sulfide is 100ppm) is injected from the gas inlet 8 into the mixing chamber of the simulated wellbore device 1 through the liquid inlet channel, and the well killing gas is injected from the liquid distribution tank 4 Liquid 140kg(m 1 ), the gas-liquid mixed fluid composed of killing fluid and hydrogen sulfide test gas fills the mixin...

Embodiment 2

[0048] The evaluation results of Example 2 and Example 3 are summarized in Table 2.

[0049] Table 2 Evaluation of sulfur removal effect of basic zinc carbonate and sponge iron

[0050]

[0051] As can be seen from the experimental results in Table 2, the desulfurization capacity detection values ​​of the same desulfurizer are basically the same, with a maximum error of 1.48%. The detection repeatability is good. As far as copper sulfate, basic zinc carbonate, and sponge iron are concerned, sponge iron has the strongest desulfurization ability, followed by basic zinc carbonate, and copper sulfate has the worst desulfurization effect.

[0052] The embodiment of the above evaluation method is to utilize the following dynamic evaluation method to realize the desulfurization ability evaluation of the desulfurizer in essence, that is to add a certain quality of working liquid and hydrogen sulfide test gas into a closed circulation loop to make the working liquid and hydrogen su...

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Abstract

The invention relates to a device and method for evaluating desulfurizing effect of a desulfurizing agent. The evaluation method includes the following steps of: adding a certain amount of working liquid and hydrogen sulfide test gas to a closed circulation circuit to ensure that the working liquid and the hydrogen sulfide test gas circulate in the circulation circuit to form a gas-liquid mixed fluid, detecting the concentration of hydrogen sulfide gas in the gas component of the gas-liquid mixed fluid, and recording the concentration as the hydrogen sulfide concentration M1 before desulfurization; and then, adding a desulfurizing agent to the circulation circuit, forming a gas-liquid mixed fluid containing the desulfurizing agent after circulation flow, detecting the concentration of thehydrogen sulfide gas in the gas component of the gas-liquid mixed fluid containing the desulfurizing agent, recording the concentration as the hydrogen sulfide concentration M2 after desulfurization,and evaluating the desulfurizing effect of the desulfurizing agent based on M1 and M2. According to the method for evaluating the desulfurizing effect of the desulfurizing agent provided by the invention, the test result is closer to the true value, the evaluation result is reliable, and the measurement accuracy is high.

Description

technical field [0001] The invention belongs to the field of evaluating the desulfurizing effect of desulfurizing agents in oil well chemistry, and in particular relates to a device and method for evaluating desulfurizing effects of desulfurizing agents. Background technique [0002] Hydrogen sulfide is a highly toxic gas, when the concentration in the air exceeds 1000mg / m 3 It can cause acute poisoning and cause casualties. During the well killing process, hydrogen sulfide gas invasion will firstly cause serious pollution to the killing fluid, resulting in poor performance of the killing fluid; secondly, it will cause hydrogen embrittlement damage to the metal, resulting in sudden breakage of the downhole pipe string, failure of wellhead devices, Surface manifolds and instruments burst, causing out-of-control blowout or fire accidents. H encountered during well killing 2 When S gas invades, can the H in the working fluid be removed in time? 2 S gas is crucial. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
CPCG01N33/00
Inventor 曾浩刘青龙刘晶李晓东张文昌苗宏彭睿胡晓宇
Owner CHINA PETROLEUM & CHEM CORP
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