Oil-water well outside-pipe fluid channeling distributed optical fiber detection simulation device and use method thereof

Abstract

The invention relates to an oil-water well outside-pipe fluid channeling distributed optical fiber detection simulation device and a use method thereof. The simulation device comprises DAS detection equipment and an optical fiber, wherein the optical fiber is connected to the DAS detection equipment, a test pipeline is mounted in a cement tank of a shaft simulator and communicates with test pipe fitting valves in the shaft simulator, the optical fiber penetrates into an oil sleeve annulus between a simulation oil pipe and a simulation sleeve in the shaft simulator, a water pump II is connected with oil sleeve control valves mounted at two ends of the shaft simulator and a water tank through circulating pipelines to form a shaft state circulating loop, and a first water pump is connected with a test pipe fitting valve in the shaft simulator and the water tank through the circulation pipelines to form a shaft test section selection circulation loop. According to the simulation device, the test pipeline is selected and installed according to the requirement of a circulation test, DAS detection equipment is started, and the outside-pipe fluid channeling test is selected to be completely or partially completed by controlling the first water pump, the second water pump, the oil sleeve control valves, test pipeline control valves and test pipe fitting valves.

Description

technical field [0001] The invention relates to a detection device for channeling outside of downhole pipes in the petroleum industry, in particular to a distributed optical fiber detection simulation device for channeling outside oil-water well pipes and a method for using the same. Background technique [0002] With the continuous deepening of oilfield development, due to the influence of various factors such as formation stress changes, perforation, acidification, fracturing, etc. on the cement sheath, channeling outside the oil and water well pipe is becoming more and more serious. As a result, the water cut of the oil well increases, the production decreases, the non-target layer of the water well absorbs water, the water injection is invalid, and the injection-production well pattern is severely damaged. At present, the detection of channeling outside the pipe mainly includes well temperature method, isotope method, boron neutron method, acoustic wave density logging m...

AI Technical Summary

Problems solved by technology

At present, distributed temperature sensing (DTS) technology is relatively common for detecting wellbore temperature changes, and detailed sample data templates have been obtained through a large number of indoor tests; distributed acoustic sensing (DAS) technology In recent years, it has been applied in the field of oil field, the technology maturity is relatively poor, and there is a lack of relevant test sample data, especially for the detection of channeling outside the casing, the detection of fluid flow outside the casing in the casing, many interference factors, and difficult detection Big

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