Downhole water cut meter

Abstract

The invention provides a downhole water cut meter. The downhole water cut meter comprises a circuit bin shell, an outer conductor and an inner conductor, wherein a first contact is in seal connectionwith the upper end of the circuit bin shell, a second contact is in seal connection with the lower end of the circuit bin shell, and a center control circuit is arranged in the circuit bin shell; theupper end of the outer conductor is connected with the second contact, a liquid outlet is formed in the side wall of the upper end of the outer conductor, a third contact is connected with the lower end of the outer conductor, an inner conductor support is connected with the interior of the third contact, and a liquid inlet is formed between the inner conductor support and the third contact; and the inner conductor is arranged in the outer conductor in a penetrating mode, the upper end of the inner conductor is connected with the second contact and electrically connected with the center control circuit, and the lower end of the inner conductor is connected with the inner conductor support and electrically connected with the center control circuit. The downhole water cut meter is directly arranged in a downhole tool, the water cut of a downhole oil layer can be measured in real time, and the downhole water cut meter has the advantages that operation is simple, the measuring period is short, the cost is low, and the measurement data amount is high.

Description

technical field [0001] The invention relates to a water cut meter, in particular to a water cut meter for downhole use in the technical field of petroleum exploitation. Background technique [0002] In oil field development, the liquid produced by an oil well is often a mixture of oil, water and gas. The water content of the produced liquid is one of the basic downhole parameters of the production well and one of the important indicators for evaluating the production capacity of the oil well. In different intervals of the same oil well, the water content of the produced fluid is different. Therefore, it is necessary to measure the water content of different oil layers, and design the production plan according to the test data, so as to realize the reasonable development of the oil field. [0003] At present, the methods for measuring the water content of crude oil are mainly divided into two categories: surface test method and downhole tool test method. Among them: the grou...

AI Technical Summary

Problems solved by technology

Among them: the ground test method is to measure the water content of crude oil by distillation or ray after the crude oil is extracted to the ground, which belongs to off-line measurement. It indirectly reflects the actual situation of the oil layer, and has the disadvantages of long test period and high cost; the downhole instrument test method is to put the instrument with the water content test device into the well, and directly measure the water content of the oil layer produced fluid. The oil well can be measured layer by layer, and the measurement will stop after the downhole tool is taken out, so the water content data of the downhole oil layer can only be obtained intermittently

[0004] In the prior art, there is no device capable of continuous and real-time measurement of the water content of the reservoir. Therefore, it is necessary to provide a water content meter for downhole use to overcome the above defects

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