Sand control screen for gas wells in gas storage and sand control injection-production method
A sand control screen and gas storage technology, which is applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of poor circulation of injection fluid, affect production efficiency, reduce efficiency, etc., and achieve increased flow speed , Guarantee the efficiency of injection and production, and simplify the operation process
Active Publication Date: 2022-06-03
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
When the arc-shaped filter unit (and movable filter) is blocked, the arc-shaped filter unit moves outward along the radial direction of the base pipe under the action of the pressure difference inside and outside the base pipe to provide a fluid channel, but this fluid channel also exists The risk of being blocked by sand and gravel. At the same time, during the collection stage, because the sand
Method used
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Embodiment 1
r
~
1.5P
r
,
[0055] P
r
is the formation pressure, MPa.
The sand control screen body is also provided with a plurality of second one-way valves 5, and the second one-way valves 5 are located in the first one-way valve.
Above the check valve 4, the second check valve 5 transversely penetrates the protective cover 3, and the second check valve 5 is used to make the gas during the gas injection process.
The body is unidirectionally led from the inside of the sand control screen body to the outside of the sand control screen.
[0057] The first check valve 4 is a swing check valve; the second check valve 5 is a Y-type check valve.
[0058] The material of the first one-way valve is chromium-nickel-titanium steel, and the working temperature is less than or equal to 550°C, and the operating pressure is at 1.0MPa-
Embodiment 2
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Abstract
The present invention relates to the technical field of sand control well completion, in particular to a sand control screen used for gas wells in gas storages and a sand control injection-production method, including a sand control screen body, which consists of a base pipe and a sand control screen from inside to outside. The sand control screen body is provided with a plurality of first one-way valves, the first one-way valve is located at the lower end of the side wall of the sand control screen body, the first one-way valve runs through the sand control screen body in a transverse direction, and the first The one-way valve is used to make the sand-carrying fluid conduct one-way from the outside of the sand control screen body to the inside of the sand control screen during sand flushing and plugging removal. In the present invention, the first one-way valve is arranged at the lower end of the sand control screen body, so that the sand control screen has the function of sand flushing and blocking removal. And by setting the opening pressure at the first one-way valve, it is prevented that the gas carrying gravel enters the base pipe directly through the first one-way valve during the gas production process, causing the gravel to block the first one-way valve or the base pipe.
Description
A sand control screen for gas well in gas storage and sand control injection and production method technical field The present invention relates to the technical field of sand control and completion, in particular to a kind of sand control screen and sand control for gas storage gas wells Injection method. Background technique The construction of natural gas "production, supply, storage, and sales" system in China is gradually perfected, and underground gas storage is one of the natural gas industry chains. One of the important links ushered in the golden period of development. In addition, the built-up gas storages are mainly oil and gas reservoir types, and the built-up gas reservoirs are generally of the same type. It has geological characteristics such as structural fragmentation, deep burial, strong reservoir heterogeneity, and formation water invasion in the middle and later stages of development. The basic characteristic of the gas well production of the oil ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E21B43/08E21B43/00
CPCE21B43/086E21B43/00
Inventor 董长银陈琛王肇峰李经纬王兴黄有艺王金忠王远征战鑫杰刘洪刚范潇
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)