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Column type down-hole shut-in well delamination pressure test technique suitable for oil well

A tubular, oil-well technology, applied in wellbore/well components, measurement, earth-moving drilling, etc., to optimize the working system and avoid damaging the original production state

Active Publication Date: 2012-06-06
DAQING OILFIELD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies in the background technology, the present invention provides a string-type downhole shut-in layered pressure measurement process suitable for oil wells, the layered pressure measurement process and the The pressure measurement technology of the pressure string can shut down the well under the normal production state of the oil well and complete the layered static pressure test, thus avoiding the problems of destroying the original production state and being unable to eliminate the influence of downhole continuous flow faced by the current pressure measurement technology question

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  • Column type down-hole shut-in well delamination pressure test technique suitable for oil well
  • Column type down-hole shut-in well delamination pressure test technique suitable for oil well

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with embodiment:

[0028] The string-type downhole shut-in and layered pressure measurement technology applicable to oil wells includes the following steps:

[0029] (1) Firstly, the original well pipe string is lifted out through downhole construction, scraped, and the well is passed through to ensure that the stratified pressure measurement pipe string can be smoothly lowered into the target layer;

[0030] (2) On the basis of 72 hours of production after completion, set the working sequence of the electronically controlled downhole switch. After 72 hours of production after completion, the electronically controlled switch is automatically closed, and the switch control is performed on the corresponding production layer;

[0031] (3) Run into the distribution string for pressure measurement in layers with a pressure gauge. Packers are used in the production string to isolate the intervals that requir...

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Abstract

The invention relates to a pipe string type downhole shut-in layering pressure measurement process and a pressure measurement pipe string. The process comprises the following steps: (1) an original well pipe string is taken out; (2) the working sequences of electrical control downhole on-off actuators are set on the basis that the production lasts for 72h after well completion; (3) a pressure measurement production proration pipe string is put into the well; (4) the positions of the downhole tools are verified; (5) a packer is released by pumping the pressure to 15 to 18MPa; (6) the pipe string is lifted up; (7) the original well pipe string is put into the well and well completion production is carried out; (8) each stage of downhole on-off actuator is turned off after carrying out production for 72h; (9) a pump is stopped on the ground simultaneously; (10) the shut-in layering pressure measurement is finished; (11) then the original pipe string is taken out; (12) a fishing pipe string is put into the well; (13) the original string is put into the well; and (14) each layer of manometer data is played back, and oil pool data is layered. The process avoids the problems that the original production state is destroyed and the downhole afterflow influence can be eliminated in the existing pressure measurement process technology.

Description

Technical field: [0001] The invention relates to a pressure measurement technology used in the field of oil field testing, in particular to a pipe string type downhole shut-in and layered pressure measurement technology suitable for oil wells. Background technique: [0002] At present, the layered pressure measurement is carried out in oil wells with a production rationer structure, and the pressure measurement interval is blocked by the plug-type pressure gauge to obtain the layered pressure. The pressure measurement method will destroy the original production state of oil and water wells, and have a certain impact on the results of layered pressure measurement. Oil well pressure measurement for multi-layer mixed production wells is mainly carried out by means of steel wire general hoisting to obtain pressure data at the depth of the oil well. The interpretation results are true and accurate for single-layer production oil wells, which can meet the needs of the geological...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/06
Inventor 胡占晖邓广宇
Owner DAQING OILFIELD CO LTD
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