Device and method for automatically detecting water quality of oilfield wet steam generator

Abstract

The invention discloses a device and method for automatically detecting the water quality of an oilfield wet steam generator. The device comprises an operating display panel, a main control board, a closed detection bin and a reagent storage matrix chamber, wherein the closed detection bin is connected with the reagent storage matrix chamber, a water sample inlet of the wet steam generator and a water sample outlet respectively; and the main control board is connected with the operating display panel, the water sample inlet of the wet steam generator, the water sample outlet, an electronic eye, a cleaning dryer and the reagent storage matrix chamber respectively. When the water quality is detected, corresponding water samples are extracted and titrated with various reagents in sequence and mixed, human eyes are simulated by an electronic means to realize parameter feedback of color, color saturation and the like, multiple dynamic curves are generated and compared with a standard curve, titration is stopped after high fitting, and the water hardness, steam dryness and sodium sulfite excess quantity of the wet steam generator are calculated, so that automatic on-line detection of water quality parameters is realized, the problems of water quality detection lag, low precision and the like of the wet steam generator are effectively solved, the steam injection quality is improved and the safety production of the wet steam generator is guaranteed at the same time.

Description

[0001] Technical field: [0002] The invention relates to the technical field of oilfield exploitation, in particular to an automatic water quality detection device and method for an oilfield wet steam generator. [0003] Background technique: [0004] The steam huff and puff method is generally used in the production of heavy oil in China. This method is to inject the high-temperature and high-pressure wet steam generated by the wet steam generator into the underground oil layer, thereby reducing the viscosity of heavy oil and improving oil well recovery. [0005] Wet steam generators have high requirements on water quality, and the total hardness in the water must not exceed 0.001moL / L. If the water hardness exceeds the standard, the furnace tube will quickly scale. The fouling of the furnace tube will reduce the heat conduction ability and increase the fuel consumption. If it runs hard for a long time, it is very easy to cause major safety accidents such as pipe explosion. ...

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Problems solved by technology

[0007] In addition, the excess amount of sodium sulfite in the wet steam generator water will cause oxygen corrosion of the wet steam generator furnace tube, if it is too high, it will produce toxic gas, and the hydrogen sulfide gas produced has the risk of explosion, and the production of sodium hydroxide will increase the pH value of the water Causes caustic embrittlement, leading to more fouling when overheated

[0008] At present, the methods for measuring the above water quality parameters and wet steam dryness are mainly divided into the following types: manual laboratory method, PH value method, conductivity method, microwave measurement method, volume calculation method, spectrometry method, etc., but considering the cost and technology For the maturity of the method, most of the artificial assay methods are still used nowadays, but due to various objective factors such as the color change of the sampled water, the inconsistent mixing speed, and the inconsistent sensitivity of the human eye to light and color during the determination process using the artificial titration method, This method has many defects such as large error and lag in assay time, resulting in long-term low-efficiency operation of the wet steam generator

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