Abstract

In order to delay the water breakthrough and reduce water production once breakthrough occurs in the bottom water reservoirs, the water control mechanism of novel C-AICD is studied.

The paper describes the laboratory testing of C-AICD, AICD and ICD performed to evaluate the performance of C-AICD and the differences between C-AICD, AICD and ICD. Results from single phase experimental flow testing are presented and discussed.

The testing was conducted in a dedicated flow facility with water, oil and mixed phase fluild. It is under the same experimental conditions to test the water control effect of ICD, AICD, and C-AICD and be analyzed based on the recorded pressure and flow rate data.

The testing results showed that C-AICD could take advantage of AICD and ICD. It could function as a passive ICD to achieve uniform inflow at the beginning of production, and then function as AICD to autonomously restrict water production in the middle and late stages.

Based on a water control design and simulation of one horizontal well, it is found that the comprehensive water-cut of C-AICD well in the production life is about 13% lower than that of the common screen well, which provides a new technical method for economic and effective water-control in oil fields.

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