Water exploration testing device for horizontal well in offshore oilfield and dynamic dividing and positioning method of water exploration testing device

Abstract

The invention discloses a water exploration testing device for a horizontal well in an offshore oilfield. The water exploration testing device comprises a downhole crawler, a lower divider, a water content tester and an upper divider which are connected in sequence. The invention further discloses a dynamic dividing and positioning method using the water exploration testing device. The method includes the steps that firstly, the water exploration testing device is lowered into the well; secondly, the downhole crawler pulls the water exploration testing device to a target interval, water exploration testing is conducted, and data is fed back to the ground; thirdly, analog computation of the flow field change of a wellhole is conducted through ground software, and a water exit interval is positioned to achieve accurate water exploration; fourthly, the downhole crawler pulls the water exploration testing device to a next target interval, water exploration testing is conducted again, and the steps are circularly conducted in sequence till water exploration testing of a whole horizontal interval is completed. The construction process is simple, the automation level is high, dynamic sectional packaging is achieved in the variable-flow wellhole, the water exit position is accurately judged, and the water exploration efficiency is improved.

Description

technical field [0001] The invention relates to a water-seeking technology for a horizontal well in an offshore oil field, in particular to a water-seeking test device for a horizontal well in an offshore oil field and a dynamic separation and positioning method thereof. Background technique [0002] Horizontal well technology can increase the contact area between the wellbore and the reservoir, reduce seepage resistance, and improve the overall development effect of the oilfield. In recent years, it has been vigorously promoted and applied in China. At present, the ratio of horizontal wells in offshore oil fields exceeds 12%. As more and more horizontal wells are put into production, the problem of oil well water production is becoming more and more prominent. The most direct harm is the decline in crude oil production and the increase in the load on oil-water separation and sewage treatment systems. At present, open hole sand control is mostly used in the completion of ...

AI Technical Summary

Problems solved by technology

At present, offshore horizontal wells mostly use open-hole sand control completion in the completion method. The layers communicate with each other, and the fluid in the horizontal wellbore flows with variable quality, which makes it impossible to accurately separate and locate water.

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