Method for testing producing profiles of horizontal well through coiled tubing optical fiber technology

Abstract

The invention provides a method for testing producing profiles of a horizontal well through a coiled tubing optical fiber technology. The method comprises the following steps of type selection of coiled tubings and optical fibers, mounting of the optical fibers penetrating through the coiled tubings, testing operation, mounting and pressure testing operation of the continuous oil pipes, debuggingand rectifying of a data collecting system, putting down of the continuous oil pipes to target positions, determining of testing schemes and relevant parameters, testing of the optical fiber producingprofiles and collecting of data, extracting, dividing, fitting, rectifying and treatment of the data, and analyzing and explaining of the data. According to the method provided by the invention, no logging instrument is arranged, the continuous oil pipes are applied to put down the testing optical fibers to target layers, real-time monitoring of a whole shaft for 24 h is achieved accordingly, theproducing profiles of all tested well sections of the horizontal well and the producing contribution of all the producing layers are obtained, the well diameter limitation of putting down of producing oil pipes or large-drift-diameter bridge plugs in the well shaft can be overcome, or the problem of large construction difficulty of testing of the producing profiles of the large-slope horizontal well is solved.

Description

technical field [0001] The invention relates to a method for testing the output profile of a horizontal well by using the coiled tubing optical fiber technology, and belongs to the technical field of petroleum exploitation. Background technique [0002] Nowadays, technicians in the field of oil and gas exploitation have been paying great attention to the quantitative analysis of the output of each stage after the staged fracturing stimulation and stimulation of the horizontal well. Therefore, the production profile test has become an important means to analyze the output status of the production interval. It is hoped that through this method, under the condition of oil and gas well production, the real-time dynamic monitoring of the output of each section of the horizontal well can be carried out, and the relationship between oil, gas and water three-phase fluid in the wellbore, single-layer production, pressure and other important parameters can be accurately tested. Provid...

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Problems solved by technology

However, the relevant technologies that have been formed so far have not completely solved or overcome the above difficulties, especially the limitation of the diameter of the small-diameter tubing or large-diameter bridge plug in the well, or the difficulty in implementing the test production profile of the highly deviated horizontal well. Large, and difficult to accurately monitor the production profile of the whole wellbore

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