Domestic demand analysis for gas wells under pressure operation equipment

At present, most of the onshore oil fields in my country have entered the middle and late stages of development. The pressure of oil and gas wells has been decreasing year by year, and the contradiction between injection and production has become increasingly prominent. In order to greatly increase the recovery rate, various new processes and new technologies have been widely used in different oil fields. Applications.

With the continuous improvement of oilfield experts' understanding of pressure operation technology, all domestic oilfields are considering the protection of oil and gas layers during drilling and workover processes, construction safety and environmental protection, whether it is onshore oilfields or beach seas. The shallow sea oil fields have great demand for pressure operations.

These requirements are mainly reflected in the following aspects:

Gas well operation's demand for well pressure

Many gas wells have the characteristics of low pressure coefficient and good physical properties. During drilling and workover, they are prone to lost circulation, causing killing fluid to enter the formation, causing mineral migration and expansion, and causing formation blockage. Pressure operation technology can solve the problem of gas layer protection and avoid the impact of well fluid leakage.

Domestic demand analysis for equipment under pressure

Low permeability oil field demand

A large proportion of my country’s oilfield resources are low-permeability oilfields. For a long time, they have been affected by the characteristics of low-permeability oilfields and restricted by technical conditions, resulting in a large gap in the average recovery rate of low-permeability oilfields. The characteristics of low porosity, poor connectivity, high cement content, complex structure, high primary water saturation, and serious heterogeneity make it vulnerable to damage during mining and drilling. It is urgently needed to improve the operation through the technology of pressure operation equipment The status quo, improve the recovery rate.

Special structure well needs

Due to the complexity of the geological structure in some places, higher-density kill fluids are required for conventional exploration, which increases the difficulty of later logging and can easily cause misinterpretation or even miss oil and gas layers. If the working technology under pressure can be used, the logging error rate can be reduced, the oil and gas reservoirs can be protected, and the subsequent completion and use process can be guaranteed.

Construction requirements for water injection wells

Many water injection wells are affected by the increase in wellhead injection pressure after water injection, which will cause the problem of low permeability. In conventional operations, it takes a long time to depressurize and construct, which will affect the entire surrounding area and cause environmental problems. The use of pressure working technology can reduce environmental problems and shorten the pressure protection time, thereby enhancing the recovery rate.