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Experimental simulation device for relieving near-wellbore plugging of gas-condensate well and simulation method

An experimental simulation, condensate gas well technology, which is applied to measurement devices, analytical materials, material inspection products, etc., can solve the problems of unsatisfactory reverse condensate effect and short seepage channels, so as to release formation water lock, facilitate observation, reduce The effect of hold-up

Active Publication Date: 2019-12-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the gas source layer in the far-well zone is not simulated in the condensate gas plugging removal experiment, or the simulated seepage channel is too short to meet the actual formation conditions, and the condensate gas is basically injected dry gas, CO 2 and other gases, but the dry gas is difficult to effectively push the reverse osmosis absorption water far away from the formation, while CO 2 Corrosive to a certain extent, for high salinity and high Ca content 2+ , Mg 2+ Ionic formation water may produce precipitation
Therefore, only dry gas or CO 2 Gas treatment gas well near the wellbore zone is not ideal for retrograde condensation

Method used

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  • Experimental simulation device for relieving near-wellbore plugging of gas-condensate well and simulation method
  • Experimental simulation device for relieving near-wellbore plugging of gas-condensate well and simulation method
  • Experimental simulation device for relieving near-wellbore plugging of gas-condensate well and simulation method

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Experimental program
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Effect test

Embodiment 1

[0058] This embodiment provides an experimental simulation device for removing blockage near the well of a condensate gas well. The schematic diagram of the device is as follows figure 1 shown, from figure 1 It can be seen that it includes:

[0059] Adjustable constant temperature oven 1, long core holder 2, thin sand-filled tube 7, condensate gas sample storage tank 5, ethanol sample storage tank 9, condensate oil collection pipe 8, liquid nitrogen cooling system 10 and automatic gas meter 11;

[0060] The long core holder 2 is used to place the target long core for simulating the near-wellbore zone; the condensate gas sample storage tank 5 passes through the pipeline sequentially through the intake valve 17 and the third high-precision pressure monitoring gauge 18 and the The thin sand-filling tube 7 is connected, and the thin sand-filling tube 7 is connected to the inlet end of the long core holder 2 through the pipeline through the first high-precision pressure monitorin...

Embodiment 2

[0068] This embodiment provides an experimental simulation method for unblocking near-well of condensate gas wells, wherein the method utilizes the experimental simulation device for unblocking near-well of condensate gas wells provided in Example 1, and the method specifically includes the following steps :

[0069] (1) Weigh a number of short cores in turn and test the porosity of the cores, evacuate these short cores and fully saturate the formation water (generally, it will be saturated with formation water for one day), and then centrifuge with a centrifuge to remove possible porosity in the cores. Weigh again after flowing water until the cores meet the requirement of irreducible water saturation, and then sort these short cores according to the harmonic average and then put them into the rubber bucket and put them into the long core holder, and set the temperature of the constant temperature box (1) to the experimental value. Formation temperature, measuring the permeab...

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Abstract

The invention provides an experimental simulation device for relieving near-wellbore plugging of a gas-condensate well, and a simulation method. The device comprises an adjustable constant temperatureoven, a long-core clamper, a sand-filling tubule, a gas-condensate sample storage tank, an ethanol sample storage tank, an oil-condensate collecting tube, a liquid-nitrogen cooling system and a full-automatic gasometer; the long-core clamper is used for placing a target long-core for simulating immediate vicinity of wellbore; the gas-condensate sample storage tank is connected with the sand-filling tubule; the sand-filling tubule is connected with an inlet end of the long-core clamper through a first high-precision pressure monitoring gauge, and an outlet end of the long-core clamper is connected with the ethanol sample storage tank through the second high-precision pressure monitoring gauge and a back-pressure valve and connected with the oil-condensate collecting tube through a capillary tube and the oil-condensate collecting tube; the long-core clamper and the sand-filling tubule are located in the adjustable constant temperature oven; the oil-condensate collecting tube is locatedin the liquid nitrogen cooling system; and the middle of the long-core clamper is further connected with a confining pressure gauge.

Description

technical field [0001] The invention relates to an experimental simulation device and a simulation method for removing near-well blockage of condensate gas wells, and belongs to the technical field of reverse condensate liquid plugging removal in condensate gas reservoirs in the petroleum and natural gas industry. Background technique [0002] The pressure of condensate gas reservoirs will gradually decrease during the production process. When the pressure is lower than the dew point pressure, retrograde condensate oil will be precipitated. As retrograde condensate oil continues to precipitate and accumulate, it will cause formation pores near the wellbore to be blocked. The production capacity of the gas well is reduced and the production loss is huge. It is a crucial issue in the development of condensate gas reservoirs to study how to remove the plugging of pores by reverse condensate in gas condensate reservoirs. At present, the condensate gas plugging removal experimen...

Claims

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Application Information

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IPC IPC(8): G01N15/08G01N33/24
CPCG01N15/0826G01N33/24Y02P90/70
Inventor 赫安乐邹春梅汤勇晏军王青华张合文
Owner PETROCHINA CO LTD
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