Composite coiled tubing cable horizontal well water outlet section testing system and method

Abstract

The invention discloses a composite coiled tubing cable horizontal well water outlet section testing system and method. An upper hydraulic packer assembly and a lower hydraulic packer assembly can beused for packing the position of any section in an oil well casing pipe. An oil-submerged electric plunger pump is used for pumping the liquid in the oil well casing pipe, the liquid conveyed to the ground surface by the underground oil-submerged electric plunger pump after packer setting is analyzed, and therefore whether the liquid is pure water, oil-containing water and water-containing oil, the liquid production capacity and the liquid discharging conditions of all sections can be visually observed; and an underground temperature and pressure sensor assembly is used for testing the temperature and pressure of the packed section, whether the section is the water discharging section or not can be further illustrated according to the pressure and temperature changes of produced liquid andall perforation sections, so that corresponding treatment measures are taken, and the phenomenon that water contained in the produced liquid is increased fast during oil-gas field horizontal well production till furious water logging happens, and normal production of an oil-water well is affected is avoided.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development, relates to the treatment technology of horizontal wells in the development of oil and gas fields, in particular to a composite continuous umbilical cable horizontal well water delivery section testing system and method. Background technique [0002] In the process of oilfield development, all oilfields are investing in horizontal wells for oil production. The water content of horizontal wells will rise rapidly after a certain period of time. Once water comes out of a perforation section, the crude oil in other sections will be held down by the water because the water flow rate is faster than the original one. If it cannot come out, it will cause explosive water flooding, seriously affecting the normal development of the oilfield. For the normal production of horizontal wells, the outlet section must be found for plugging. [0003] Conventional methods for finding water in h...

AI Technical Summary

Problems solved by technology

[0004] 1. Horizontal well production testing technology, reservoir / section parameter evaluation technology, both methods require the cooperation of coiled tubing operations, while the domestic horizontal well technology is still in the stage of rapid development, because most of them use small-diameter well completion well structures and The design of the completion production string itself is difficult, and the testing instrument is difficult to run into the well during production. It is quite difficult to test the production profile of the horizontal well, and the operation cost is high.

[0005] 2. Horizontal sampling technology. According to the number of production sections, multiple sets of packers and electric samplers are used. Conventional strings are used to send the packers and samplers to the horizontal section. After the packers are seated, the ground controls the opening of the samplers. , the sampling period is long, and the consumption of the battery at the bottom of the well affects the sampling effect

Images