Water content testing instrument for thermal horizontal well

Abstract

The invention discloses a water content testing instrument for a thermal horizontal well. The water content testing instrument comprises a sensor and a data acquisition circuit, wherein the sensor and the data acquisition circuit are mutually connected; the data acquisition circuit is protected in a metal thermos bottle; a sensor body base which is used for connecting and fixing the sensor is arranged at the front end opening of the metal thermos bottle; the sensor comprises a water-containing sensor, a micro-differential temperature testing sensor head and a pressure sensor probe; the outer part of the metal thermos bottle is provided with an inner instrument protection tube in a sleeving way; the outer side of the inner instrument protection tube is hollowly provided with an outer instrument protection tube in the sleeving way; an annular space is formed between the inner instrument protection tube and the outer instrument protection tube; the front end of the outer instrument protection tube is connected with a sensor protection tube; the sensor is totally protected in the sensor protection tube. According to the water content testing instrument disclosed by the invention, not only can the position of a water production interval of a high-water content horizontal well be monitored, and a plugging and regulating position and a scheme be made, but also a profile testing for the water content, the static well temperature and the well pressure can be carried out on the thermal horizontal well which is injected by steam, so that the steam absorption situation, the liquid production situation and a production degree of a horizontal interval of each perforation interval during a steam injection process can be qualitatively judged.

Description

technical field [0001] The invention relates to monitoring equipment, in particular to a water content tester for thermal recovery horizontal wells, which is suitable for monitoring the position of the water outlet layer in the horizontal section of the horizontal well and monitoring the temperature profile and pressure profile in the horizontal section. Background technique [0002] With the development of supporting technologies for horizontal wells, the application fields and scale of horizontal wells are constantly expanding, and the application of horizontal wells has also changed from scattered to overall. Ensure that the long horizontal section cannot be fully produced uniformly, especially in heavy oil thermal recovery horizontal wells, this phenomenon is particularly obvious. There are many low-efficiency high-water-cut horizontal wells in the horizontal wells that have been put into operation. It is urgent to use testing methods to solve the location of the water-p...

AI Technical Summary

Problems solved by technology

At present, the impedance type and capacitance type water content meters have been applied in the production profile logging of vertical wells in Daqing, Henan, Jianghan and other oilfields, and have achieved certain results. However, when the water content of the produced fluid is high, the impedance type The accuracy of the sensor test is low, and it is not applied to the water cut monitoring of horizontal wells

When the viscosity of crude oil is high, especially heavy oil, the traditional capacitive sensor is easy to stick to oil, resulting in low test accuracy

At present, the traditional water content sensors have partial zero drift and anti-interference problems, and at the same time cannot solve the influence of various flow patterns, the influence of high temperature and the influence of high viscosity.

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