Water exploration string capable of monitoring horizontal-section production flow and water content in horizontal and vertical well sections and operation method of water

Abstract

The invention discloses a water exploration string capable of monitoring horizontal-section production flow and water content in horizontal and vertical well sections and an operation method of water with an aim to improve accuracy of water exploration test in horizontal wells and water exploration efficiency. The water exploration string is connected all levels of connecting units composed of intelligent switches and packers through an oil pipe, each connecting unit corresponds to one layer section, and the intelligent switch on the topmost level is upwardly connected with an underground storage type water monitor, an oil well pump and a sucker rod connected with a pumping unit in the vertical well sections. Acquisition time of the monitor and the intelligent switches are set on the ground, when underground production starts, data of flow and water content and the like of fluid on each layer section are monitored online, recorded and played back through the underground storage type water monitor, and water production sections and water yield can be judged. Online water exploration test is performed through the underground storage type water monitor, so that accuracy in test and water exploration efficiency can be improved, on-site labor intensity can be lowered, and reliable basis can be provided for water control and oil production measures of the horizontal wells.

Description

technical field [0001] The invention relates to a water finding pipe string and a working method thereof for monitoring the production flow rate and water content of the horizontal section in the vertical well section of a horizontal well, and belongs to the technical field of oil recovery. Background technique [0002] At present, major domestic oilfields are focusing on improving reservoir production, increasing recovery, increasing single well production and reducing production costs, and are vigorously promoting horizontal well production technology. Due to the complex and changeable wellbore trajectory and injection-production well pattern of horizontal wells, the lithology, physical properties and reservoir fluid properties of the involved oil layers are different, and the water absorption capacity, waterline advancement speed and liquid production status of each layer are different , some layers break through water early, the level and direction of water breakthrough ...

AI Technical Summary

Problems solved by technology

This technology produces 10 days for each layer, and the water search cycle is long, which seriously affects the production progress on site

Affected by weather factors, the ground sampling of each section of fluid is incomplete and inaccurate, making it impossible to accurately determine the location of the water outlet

Manual single-volume liquid sampling for each section of the day, sent to the laboratory for analysis, the work intensity is high

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