Slurry gas detecting method in pit

一种井下检测、泥浆的技术，应用在测量、土方钻采、井眼/井部件等方向，能够解决不能加快甲烷电催化氧化、高电流密度等问题，达到预防井喷事故、防止反应、满足使用的效果

Inactive Publication Date: 2013-09-11
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

Catalysis at the anode may require higher current densities than direct catalytic oxidation of methane by platinum. This is because the adsorption of methane on the electrode is also a rate-determining process. If the improved catalyst can be oxidized at a lower voltage * CO, but if it reduces the adsorption of methane on the electrode at the same time, it cannot accelerate the electrocatalytic oxidation of methane

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Embodiment Construction

[0026] The main realization principles and specific implementation methods of the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings. The method provided by the present invention adopts the principle of electrochemical method to detect mud gas downhole, and an electrochemical detection chamber is designed. The working principle of the device is as follows: figure 1 shown. It mainly includes: a water pump to ensure that the liquid in the electrochemical detection room keeps flowing; the electrochemical detection room (1) mainly consists of a two-layer filter membrane structure and a three-electrode electrochemical test system (working electrode WE, contrast electrode CE, reference electrode RE) for filtering gas and performing catalytic reactions; signal processing and transmitting devices for amplification and wireless transmission of electrical signals.

[0027] Please refer to figure 1, its working pri...

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Abstract

The invention discloses a slurry gas detecting method in a pit, and aims to solve the problem of poor real-time performance of existing detecting techniques in the field of slurry gas detection. The detecting method includes that on the basis of an electrochemical detection principle, slurry passes an electrochemical detecting chamber and two layers of filtering films, redox reactions are generated on three electrodes by gas to generate currents, and after signal processing, the currents are transmitted by a transmitting device to a well drilling platform for judgment by on-duty operators. The electrochemical detecting chamber and two layers of filtering film structures formed by a punched-plate composite sintered metal filter and gas-transmitting films are designed, and the slurry gas detecting method is applicable to three-electrode electrochemical testing systems for methane detection as well as signal processing and transmitting devices of gas detecting signals. The slurry gas detecting method is applicable to real-time detection, and real-time slurry gas detection in the pit can be realized, so that blowout accidents can be prevented in advance, geologists are assisted to find and evaluate underground oil gas, and important research value is provided.

Description

technical field [0001] The invention relates to the field of mud gas detection, in particular to a mud gas downhole detection method. Background technique [0002] In the process of oil and gas exploitation, as long as the oil and gas layer is opened, the dangerous gases such as hydrocarbons in the oil and gas layer will be more or less mixed into the mud and carried to the ground, so that the density of the used mud is not enough to balance the formation pressure. A large amount of oil and gas entering the wellbore makes the formation pressure higher than the mud liquid column pressure, which will cause the mud density to decrease, and severe imbalance will lead to blowout. Therefore, the sooner oil and gas anomalies in the subsurface are detected, the sooner accidents can be avoided. Although there are many types of mud gas detection in mud logging, there is almost no detection technology that can truly detect underground mud gas in real time. Currently, the commonly used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/08E21B47/12
Inventor 罗仁泽柯强苏赋石明江党煜蒲陈松
Owner SOUTHWEST PETROLEUM UNIV
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