Comprehensive drainage and gas recovery device and method
A technology for drainage gas production and gas production, which is applied in the fields of fluid production, earthwork drilling, drilling pipes, etc., can solve problems such as liquid accumulation at the bottom of the well, and achieve the effect of reducing the difficulty of foaming and improving the drainage efficiency.
Active Publication Date: 2021-01-05
南充西南石油大学设计研究院有限责任公司
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a comprehensive drainage and gas recovery device and method that can solve the problem of liquid accumulation in the bottom of many types of water-producing gas wells and has high drainage efficiency
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[0021] The present invention will be further described below in conjunction with accompanying drawing. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention.
[0022] like Figure 1 to Figure 5 As shown, the integrated drainage and gas production device of the present invention comprises an oil Christmas tree 1, a casing 2 and a gas production tubing 3, the gas production tubing 3 is located in the casing 2, and the casing 2 and the gas production tubing 3 The top end is connected to the bottom of the Christmas tree 1, and also includes a small oil pipe 4, one end of the small oil pipe 4 can pass through the foam drainage agent from the foam drainage skid 5 and the high-pressure gas from the gas lift system 6, and the other end passes through After the Christmas tree 1 is arranged inside the gas production tubing 3 , a plurality of small tubing gas lift valves 4...
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The invention relates to the technical field of oil-gas field development, in particular to a synthetic drainage and gas production device and method. The synthetic drainage and gas production device comprises a Christmas tree, a casing pipe and a gas production oil pipe, wherein the gas production oil pipe is located in the casing pipe, and the top end of the casing pipe and the top end of the gas production oil pipe are connected to the bottom of the Christmas tree. The synthetic drainage and gas production device further comprises a small oil pipe, wherein a foam drainage agent from a foam drainage pry and high pressure gas from a gas lift system can be introduced into one end of the small oil pipe, the other end of the small oil pipe penetrates through the Christmas tree and then is arranged in the gas production oil pipe, and multiple small oil pipe gas lift valves are arranged on the segment, in the gas production oil pipe, of the small oil pipe. Due to the fact that the small oil pipe which can stretch into the gas production oil pipe and reach the bottom of a gas well and the foam drainage agent from the foam drainage pry and the high pressure gas from the gas lift system can be introduced into the small oil pipe, the foam drainage agent and the high pressure which are used for drainage can reach the bottom of the gas well, foaming difficulty is lowered, and consequently drainage efficiency of the gas well is improved.
Description
technical field [0001] The invention belongs to the technical field of oil and gas field development, and in particular relates to a comprehensive drainage and gas recovery device and method. Background technique [0002] After years of development in the gas field, the formation energy has decreased year by year, and the number of low-pressure gas wells has increased year by year. However, some gas wells show the characteristics of low pressure and low production when they are put into production. If the amount of water is less, fluid accumulation and sand accumulation will occur at the bottom of the well and in the wellbore, resulting in the failure of normal production of the gas well. At present, foam drainage gas recovery technology is widely used at home and abroad to solve the problem of low-pressure and low-production wellbore fluid accumulation in water-bearing gas reservoirs, thereby improving recovery. However, the conventional foam drainage agent injection method...
Claims
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IPC IPC(8): E21B43/16E21B43/22E21B33/06E21B33/04E21B17/18
CPCE21B17/18E21B33/04E21B33/06E21B43/16E21B43/168
Inventor 张泉汤林陈伯明
Owner 南充西南石油大学设计研究院有限责任公司