Steam dryness test method and device

Abstract

The invention provides a method for testing steam dryness. The method comprises the following steps: placing a steam condensate sample in a reactor; under the condition of continuously stirring and mixing reaction liquor by an automatic stirrer, continuously titrating silver nitrate liquor into the reactor by a micro-pump and monitoring the use level of the silver nitrate liquor; continuously monitoring the light transmittance in the titrating process by a transmissometer and automatically generating a light transmittance-silver nitrate titer curve, wherein the monitoring is at least carried out till the light transmittance is stable; and determining a reaction equivalent point from the curve so as to obtain the use level of the silver nitrate liquor at the equivalent point, and calculating the content of chlorine ions in the steam condensate sample so as to obtain the steam dryness by means of the content of chlorine ions. The invention further relates to a steam dryness test device which implements the method.

Description

technical field [0001] The invention relates to the field of petroleum exploitation, in particular to an assay method and device for measuring steam dryness during steam injection in an oil field. Background technique [0002] In the current heavy oil production, the steam injection huff and puff thermal recovery method is often used. The main process is to inject high-dryness steam into the oil layer, thereby realizing the heating of the heavy oil, and using high temperature to reduce the viscosity of the heavy oil, thereby performing huff and puff oil recovery. It is very important to monitor the dryness of steam in the thermal recovery process of heavy oil. The detection results can be used to determine the required steam injection amount and steam injection time, so as to improve oil recovery efficiency. [0003] General steam is composed of completely gaseous steam and liquid water droplets, and steam quality refers to the percentage of "dry steam" (that is, completely...

AI Technical Summary

Problems solved by technology

Because most of the commonly used testing methods use manual intervention, if there is a change in the color of condensed water, uneven mixing, unstable titration process speed, and changes in visual senses, etc., it will affect the measurement results and bring new problems to the determination of dryness. Large error and high labor cost; in addition, the assay method will have a certain hysteresis, when the steam dryness changes rapidly, it may not be able to respond in time

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