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Ion chromatography-amperometric method for detecting sulfide content in oilfield drilling mud

An oilfield drilling and ion chromatography technology, applied in the field of ion chromatography-ampere detection of sulfide content in oilfield drilling mud, can solve the problems of low precision, time and difficulty of increasing sulfide content, complicated pretreatment steps, etc., and achieve accurate Qualitative, rapid monitoring, wide-ranging effects

Active Publication Date: 2014-07-16
QINGDAO PUREN INSTR
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Problems solved by technology

However, in practical applications, the pretreatment steps before using gas chromatography to determine the sulfide content are more complicated, which increases the time and difficulty of detecting the sulfide content, and the accuracy is not high

Method used

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  • Ion chromatography-amperometric method for detecting sulfide content in oilfield drilling mud
  • Ion chromatography-amperometric method for detecting sulfide content in oilfield drilling mud
  • Ion chromatography-amperometric method for detecting sulfide content in oilfield drilling mud

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Embodiment 1

[0028] The experimental apparatus used in the present invention is as follows: PIC-10 type ion chromatograph (Qingdao Puren Instrument Co., Ltd.), voltammetry detector (Qingdao Puren Instrument Co., Ltd.), thousand spectrum 2.3 chromatographic workstation, electronic balance BSA2235 (competition Doris Scientific Instruments Ltd).

[0029] The reagent used in the present invention is as follows: sodium sulfide (analytical pure), ethylenediamine (analytical pure), boric acid (excellent pure), sodium carbonate (analytical pure), sodium thiosulfate (analytical pure), sodium hydroxide (analytical pure) pure), potassium chloride (analytical pure), and experimental water are all deionized water with a resistivity of 18.3MΩ cm.

[0030] The ion chromatography-ampere detection method of sulfide content in the oil field drilling mud of the present invention specifically comprises the following steps:

[0031] 1. Sample pretreatment

[0032] (1) Pressure filtration: Take 33.307g of mud...

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Abstract

The invention provides an ion chromatography-ampere detection method for sulfide content in oil field drilling mud. First, the mud sample is processed by high-purity nitrogen pressure filtration, dilution, solid phase extraction column adsorption, and 0.22 μm filter membrane filtration; the filler is styrene Ion chromatography column with divinyl copolymer, the eluent is boric acid 2.0-20.0mmol / L, sodium carbonate 0.5-15.0mmol / L and ethylenediamine 5.0-50.0mmol / L, at a flow rate of 0.8-2.3mL / min Determination of divalent sulfur with better resolution. The RSD values ​​of sulfide peak area and retention time were 2.37% and 0.15% (n=3), respectively, and the recoveries were 123.1%-116.7%. Finally, the content of sulfide in oilfield drilling mud can be measured accurately and quickly. The invention uses the standard addition method to qualitatively and quantitatively eliminate matrix interference to detect the sulfide content in the oilfield drilling mud, and is suitable for daily routine monitoring of the sulfide content of the oilfield mud samples.

Description

technical field [0001] The invention belongs to the field of detection and analysis, in particular to an ion chromatography-ampere detection method for sulfide content in oil field drilling mud. Background technique [0002] Sulfur is a harmful substance in petroleum, and it is easy to produce substances that seriously corrode equipment such as hydrogen sulfide, iron sulfide, iron sulfate, sulfurous acid or sulfuric acid. In the process of drilling and exploiting oil in the petroleum industry, due to the impurity sulfur in the oil, a large amount of hydrogen sulfide is often ejected; during the desulfurization or dry distillation of oil shale in the oil refining process, hydrogen sulfide is produced, which may easily cause hydrogen sulfide poisoning incidents . [0003] At present, the main methods used to analyze and determine the sulfide content in drilling mud are: electrometric method and oxidation microcoulomb method [GB11174-1997, liquefied petroleum gas]. Liquid chr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88
Inventor 侯倩慧郭文王安红
Owner QINGDAO PUREN INSTR
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