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Sinopec News Network reported on July 11 that the DPF-311 well in the Daniudi gas field used wellbore chemical desulfurization technology to desulfurize the wellbore.
After the injection, the hydrogen sulfide content of the gas well was reduced to 0 ppm
.
The wellbore chemical desulfurization technology is mainly aimed at gas wells with a hydrogen sulfide concentration of 20-100 ppm and a production rate of less than 50,000 cubic meters per day.
The desulfurizer is pumped into the casing through the wellhead chemical discharging cart.
The hydrogen sulfide natural gas is fully mixed in the wellbore to achieve the purpose of desulfurization and purification, and realize the green development of low- and micro-sulfur gas reservoirs.
So far, this technology has been applied to 21 wells in the Daniudi gas field
.
In recent years, the Petroleum Engineering Technology Research Institute of North China Oil and Gas Branch has combined with the characteristics of the petrochemical industry, focusing on the "four major scientific and technological projects" of efficient exploration, efficient production and construction, effective utilization of reserves, and efficient ground gathering and transportation, and has continued to tackle clean, ecological and environmental protection technologies for gas production.
Formed the development and application of a number of processes, giving full play to the advantages of green technology
.
Negative pressure drainage gas production technology for low-pressure gas wells
.
The company innovatively carried out research on the application of skid-mounted wellhead compressor negative pressure gas recovery technology, which improved the recovery rate of gas reservoirs to a certain extent and effectively extended the stable production time
Intelligent plunger gas lift drainage gas production technology for low production gas wells
.
Since 2018, the large-scale application of intelligent plunger gas lift drainage gas recovery technology has been promoted, and the mechanical interface of the plunger can effectively reduce the slip loss between gas and liquid and improve the efficiency of gas well liquid lifting
Up to now, a total of 45 have been promoted and applied, increasing the production of natural gas by 34.
94 million cubic meters, and the number of times of depressurization of gas wells has been reduced by 78.
1%, which not only increases the production of gas wells but also reduces the risk of environmental pollution, and effectively realizes clean gas production
.
Downhole throttling and anti-blocking technology in low pressure gathering and transportation mode
.
The company independently researched and developed differentiated downhole throttling process parameter design methods for gas wells with different liquid-to-gas ratios, enabling the gas field to achieve a balanced development of clean plugging removal and low-pressure gathering and transportation modes.
(Li Jing)
