Layered Flow Tester for Water Injection Wells with Low Injection Volume

Abstract

A layering flow tester of a low injection water quantity water injection well comprises a cable head, an adjusting arm device, an adjusting arm adjusting mechanism, an electromagnetic flowmeter component, a sealing mechanism and a guiding mechanism. A pressure temperature sensor and a control module are sequentially arranged at the lower end of the cable head, the adjusting arm device comprises an adjusting arm fixing base and an adjusting arm, the adjusting arm adjusting mechanism is connected above the adjusting arm device and controls opening and closing of the adjusting arm, the electromagnetic flowmeter component comprises a main flowmeter body, an electromagnetic flowmeter, a liquid flowing channel, a water inlet and a water outlet, the sealing mechanism is connected below the electromagnetic flowmeter and comprises a sealing actuator and at least two sealing devices, the sealing actuator drives the sealing devices to expand or contract, the water outlet is arranged between the sealing devices, the guiding mechanism is connected below the sealing mechanism and comprises a guiding motor, guiding connectors and a guiding arm, and the guiding motor is connected with the guiding arm through the guiding connectors.

Description

technical field [0001] The invention relates to the field of layered water injection layered flow test, in particular to a layered flow rate tester for water injection wells with low injection volume. Background technique [0002] The bridge-type eccentric layered water injection string is widely used in oilfields because of its high test efficiency, and the non-concentrated test method is often used to test the layered flow rate. However, the non-concentrated test method needs to use the decline method to realize the test of the single-layer flow rate. The test accuracy of the non-concentrated test method is low. In addition, the calculation of the flow rate by the descending method causes error superposition, which is difficult to meet the test requirements of low injection volume injection wells. Changqing Oilfield, Jilin Oilfield, Daqing Peripheral Oilfield and other low-permeability oilfields have a large number of low injection volume water injection wells in urgent ne...

AI Technical Summary

Problems solved by technology

The current collection test method mainly uses the existing measuring and adjusting instrument and the test sealing section of the cup structure to realize the direct test of the collecting single layer. The sealing reliability of the collecting type measuring and adjusting instrument based on the cup structure is poor: it is reflected in the gravity of the cup. Sealed, easy to seal; unsealed by lifting the cup, easy to pull off the steel wire

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