Horizontal well multi-parameter estimation method based on conducting probe array sensor

Abstract

The invention relates to a horizontal well multi-parameter estimation method based on a conducting probe array sensor. The horizontal well multi-parameter estimation method based on the conducting probe array sensor can be used for dynamic monitoring of a low-yield-liquid horizontal well yield section and is characterized by including the following steps that before the conducting probe array sensor is utilized to measure multiple parameters in the horizontal well, firstly the conducting probe array sensor is calibrated, calibrated data are acquired, and a calibrated database is established; when parameter estimation is conducted, distance matrixes are calculated according to actual response, acquired on the spot, of the conducting probe array sensor; lastly a matching vector in the calibrated database is found out according to the position of the least element in the distance matrixes, and then an azimuth angle of the conducting probe array sensor, aqueous phase electrical conductivity and oil-water interface height in the horizontal well are estimated. The horizontal well multi-parameter estimation method based on the conducting probe array sensor has the advantages that when the conducting probe array sensor is utilized to conduct horizontal well yield section well logging, the oil-water interface height and the aqueous phase electrical conductivity in the horizontal well and the azimuth angle of the conducting probe array sensor can be simultaneously measured in an online mode, a measuring lower limit is low, accuracy is high, and reliability is good.

Description

technical field [0001] The invention relates to a method for estimating multiple parameters of a horizontal well based on a conductance probe array sensor, which can be used to accurately estimate multiple parameters in the dynamic monitoring of the production profile of a low-liquid-producing horizontal well. Background technique [0002] Production logging includes injection well and production well logging technology after well completion, and its purpose is to evaluate the production performance of the oil well itself and the reservoir. In recent years, the task of production logging has been extended to the entire production process from the initial stages of drilling to the oil well. According to different measurement objects and application ranges, production logging methods can be roughly divided into three categories: production dynamic logging, production layer evaluation logging, and engineering technology logging. A horizontal well refers to a well whose inclina...

AI Technical Summary

Problems solved by technology

Horizontal well drilling technology has been perfected day by day, but affected by factors such as difficulty in logging instrument transportation and complex flow patterns, the development of horizontal well production logging technology is slow

Many domestic oilfields have successfully applied horizontal wells and achieved good economic benefits. However, long-term development has made the production status unstable. After water breakthrough in some wells, the water cut rose rapidly, and the oil production decreased significantly.

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