Super-deep well wireless transmission well testing system

Abstract

The invention discloses a wireless transmission well testing system of an ultra-deep well and relates to the filed of dynamic monitoring of an oil reservoir, in particular to a device for a pressure buildup test for an oil gas production well. The proposal utilizes a ground receiving device, a cable, a supporting cylinder, a sensing system and a ball valve; the supporting cylinder is connected with the upper part of the ball valve; the outer wall of the supporting cylinder is provided with a groove; the inside of a tube is provided with a pressure transmission passage from the lower part of the ball valve to a groove of a direct-reading manometer; the sensing system comprises the direct-reading type manometer, a cell and a receiver; the direct-reading type manometer and the cell are arranged inside the groove of the outer wall of the supporting cylinder respectively; the direct-reading type manometer consists of a sensor, an A / D module, a microcontroller, a signal emitter and a transmitting coil which are sequentially connected; the receiver consists of a receiving coil, a signal receiver, a microcontroller and a signal transmitter which are sequentially connected; and the receiver is arranged inside the supporting cylinder and is connected with the ground receiving device through the cable. The proposal realizes well shutdown underground, avoids accumulation in a well cylinder, shortens the well testing period, can fully avoid causing incomplete underground pressure buildup curve by insufficient time for well shutdown, can set sampling density at any moment through a ground computer, avoids causing the loss of wire section in early stage and meets the testing requirement of well testing of the oil gas well.

Description

technical field

[0001] The invention relates to the field of oil reservoir dynamic monitoring, in particular to a device for pressure recovery testing of oil and gas production wells. Background technique

[0002] The pressure recovery test can obtain formation parameters such as static pressure, flow pressure, permeability, flow coefficient, skin coefficient (wellbore contamination), reservoir boundary and distance, production pressure difference, etc. Provide reliable basis; pressure recovery test data is not only an important basis for oil well stimulation measures such as water injection, acidification, plug removal, profile control, etc., but also the main means to test the effect of oil well measures.

[0003] The conventional pressure recovery test of the production well is to lower the pressure gauge to the middle of the oil layer to measure the flow pressure when the oil well is in normal production, and then shut down the well on the ground. Since there is a large ...

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