Tester for oilfield eccentric separate injection well and long-time real-time working condition monitoring method

Abstract

The invention relates to a tester for an oilfield eccentric separate injection well and a long-time real-time working condition monitoring method. The method comprises the following steps of: connecting a packer, an eccentric water distributor, a monitor and a one-way valve in series through an oil pipe, putting into an injection well which requires separate injection to form an eccentric water distribution pipe column with a long-time monitoring function, arranging a set of monitor in each layer of injection well, and setting a temperature, oil pressure, casing pressure and sampling interval of the axial load parameter of the oil pipe according to user requirements before the monitor is put into the well; when data in the tester are required to be read, feeding a data reader into a deepest layer eccentric water distributor for accurately positioning, performing wireless communication with the monitor, and transmitting data in the monitor to the data reader; and repeating the operation above to finish reading data of the monitors in all layers to obtain the oil pressure, casing pressure and axial stress state of the oil pipe in each layer, and comprehend the sealing state of the packer and the separation flow of the separate injection well in real time through analysis software to provide powerful guidance and operation bases for improving the separate injection quality.

Description

technical field [0001] The invention relates to a tester and a long-term real-time monitoring method for working conditions of an eccentric layered water injection well in an oil field, in particular to a lifelong real-time seal inspection and cumulative layered flow rate of a packer that uses an eccentric water distributor or a bridge-type eccentric water distributor for layered water injection A long-term real-time monitoring method for the working condition of the eccentric dispensing string. Background technique [0002] With the continuous deepening of oil exploration and development, layered water injection has become the most economical and common method for oil fields at home and abroad to fill the formation gap and enhance recovery. Among them, eccentric water distribution technology is the main branch of layered water injection technology. After nearly 50 years of application, a series of supporting testing technologies have been formed. Since this water injection ...

AI Technical Summary

Problems solved by technology

The stratified flow may meet the injection requirements during deployment, but it is not known whether the stratified flow will change as time changes, so what is the cumulative injection volume of each layer? Due to the difference in the quality of injected water in each oilfield, after the flow is adjusted, the law of the layered flow changing with time is not the same! Therefore, only relying on flow adjustment cannot provide a long-term effective data that affects the quality of split injection, and cannot obtain the change of water injection volume in separate layers in split injection wells over time, so the quality of split injection cannot be well controlled and improved.

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