Current status and process optimization of well workover technology in downhole operations in petroleum engineering:
In oil well engineering operations, the risk factor is high, the construction environment is harsh, and the construction personnel cannot control the situation in the oil well. Therefore, in daily oil well production operations, operational errors are easily caused, which affects the production quality of the oil well. This requires oil well managers. Potential safety hazards in oil well applications can be regularly checked and repaired as soon as possible to reduce the risk of oil well production decline, actively eliminate faults in oil well applications, and apply reasonable workover technology to maintain the stability of oil well production. This article discusses oil well workover. Well process and technical measures are discussed and analyzed.
The main contents of oil well workover include:
1. Drilling inside oil well casing
In oil well production, as development work progresses, oil and gas production will continue to decline, especially in the middle and later stages, and the value of oil well extraction will be significantly reduced. If development continues, it will seriously affect corporate benefits and even affect the improvement of economic levels.
In the development of oil wells, consumption costs are high. In the later development stage, if they are directly scrapped, it will lead to the formation of a waste of oil and gas resources. In order to maximize the application value of the oil field and fully tap the remaining value of the oil field, the oil casing inner drilling technology can be used to scientifically and rationally use the wellbore and pipe string, insert them from the original casing, and carry out drilling in the casing. Window intervention is performed to form a micro-wellbore and carry out inner drilling intervention. After the sidetracking work is completed, oil and gas resources can be exploited in the lateral layers.
2. Oil well casing maintenance
During oil well production operations, the influence of different external forces on the casing will cause varying degrees of damage to the
oil well casing pipe, and will also affect the normal operation of the oil well. In order to ensure the smooth production of the oil well, a comprehensive analysis of the casing must be carried out during production. According to the stress condition of the pipe, the degree of casing damage is analyzed, and the damage problem is dealt with in a scientific way to improve the quality of casing application, optimize the performance of the casing, and maintain the normal operation of the casing.
3. Salvage fallen objects
In the development of oil wells, the working environment is relatively special. Affected by the forces of the harsh environment, parts and pipe strings will be damaged to varying degrees. In severe cases, the pipe strings may even break. After breaking, they will enter the oil well, seriously affecting the oil well. Normal exploitation of oil reservoirs, if early intervention is not taken, will increase the incidence of risky accidents.In the process of salvaging fallen objects in oil wells, professional tools need to be used for salvage intervention. If effective salvage cannot be achieved, common fallen objects including casings, bridge plugs, etc. can be salvaged during production. Since underground production has very narrow spaces, Production space, so the process of salvaging fallen objects often causes the problem of stuck downhole pipe strings, affecting normal production. If the salvage technology cannot be ensured, it will lead to the formation of a chain reaction, eventually inducing the scrapping of the oil well, resulting in economic losses. . Therefore, if production needs to be stopped immediately after the formation of downhole objects, the underground conditions must be scientifically analyzed and targeted application of process technology to intervene to ensure the normalization of the oil well production capacity.
Analysis of downhole workover technology in oil engineering:
1. Fracturing process
In the past, the commonly used crushing treatment methods in petroleum engineering mostly used single-stage separation methods, and the single-stage method was mostly used for partial recovery. With the continuous development and innovation of modern science and technology, single-stage separation technology is constantly being optimized and improved. And currently, with the application of multi-layer separation technology in the crushing process, the related work is more efficient.
2. Oil testing process
Oil well testing has been widely used in oilfield reconstruction and has been continuously improved. At this stage, the testing process is optimized to ensure the performance of the device, thus ensuring the high accuracy of the device and improving the performance of the device. The quality of the test work lays a solid foundation for the construction and development of the oil field.
3. New well control technology
In the process of oil well maintenance and management, it is relatively common to use supporting control equipment, and control devices also play an important role in oil well maintenance and management. Especially in the maintenance and control of water pumps and sand and gravel cleaning management, the use of new control equipment can maximize the safety and stability of the oil extraction process. In addition, in the process of implementing management and control in corresponding oil fields and gas areas, oilfield companies should also strengthen the use and innovation of new equipment, optimize and transform existing control equipment in the management process, and then control the pollution level of underground operations to within lowest level. In addition, relevant departments must also increase disinfection during well workover operations and innovate current technologies.
4. Well workover and pump inspection operation technology
In order to improve the working efficiency of the oil pump, it is also necessary to track the oil pump. If it is found that it is not operating normally, corresponding maintenance work should be taken in time to ensure that everything is normal before use. The normal operation of the oil pump can be maintained through pump inspection work. Since the oil pump works underground, the working conditions are relatively harsh. If it encounters the influence of sand, wax, gas and water, it will easily cause wear of the oil pump parts, making it difficult for the oil pump to work normally, and even causing production interruption. Therefore, it is necessary to increase the pumping inspection. Check the oil pump. In actual work, it is also necessary to increase efforts to manage the oil pump by combining its working conditions to ensure its normal operation. Regular maintenance can reduce the occurrence of pump stuck problems, improve the production efficiency of oil pumps, and thus lay the foundation for increasing oil well production.
Petroleum engineering downhole operation workover technology and process optimization strategy:
1. Strengthen equipment optimization
The first is to optimize salvage tools. With the continuous development of China's oilfield improvement technology, in order to further improve the quality of underground work, the workover equipment must be improved and become a key equipment. It is necessary to improve the fishing tools during the downhole operation transformation to ensure the efficiency of the work. , allowing for better integration of salvage equipment, including grinding of debris and related repairs.
If any fragments are found to be stuck, it is necessary to use pressure to rotate the cylinder upward and use a vibrator and an internal cutting machine to perform integral salvage. The second is to optimize the workover rig. In oil extraction operations, the workover rig is the most critical piece of equipment, and sufficient attention should be paid to its optimization.
2. Improve the technical level of well workover operations
When carrying out well workover operations, we should pay attention to the safety of well workover operations. On the one hand, we must strengthen safety education, improve the safety awareness of employees, and make them consciously realize that safety is a major matter; on the other hand, in order to improve the technology of well workover level, the process must be optimized to improve the technical level of well workover operations. At the same time, during the operation, the most appropriate technology and equipment must be selected based on the actual conditions on site to ensure that the operators are familiar with the equipment and operate in strict accordance with the construction regulations, thereby ensuring the safety and standardization of the operation. In addition, relevant personnel are also required to conduct a comprehensive investigation and analysis of the mine during the well workover process, fully understand all aspects of the situation, and select appropriate equipment to ensure the safety of the well workover work.And it is necessary to conduct on-site investigation of the project based on the actual situation in order to formulate a complete project plan to effectively ensure the feasibility of project construction. In addition, in the follow-up work, the plan must be strictly followed, especially without any illegal operations to avoid safety accidents.
3. Do a good job in sharing data related to underground operations
Currently, our country is in a period of big data sharing. In order to improve the quality of the entire downhole workover operation and ensure the safety of the workover operation, big data must be effectively used to collect relevant downhole oil information during the actual workover. and application. Therefore, workover workers should actively collect relevant data and information during workover work, and at the same time, they can also carry out targeted workover work based on other people's work experience and work experience, thereby comprehensively improving the quality of the entire workover work. In addition, if the problems encountered during the workover process are too complex, it is necessary to compare a large amount of data, comprehensively analyze the problem, and determine a reasonable workover process design plan. This will also play a certain role in improving the overall quality of the workover operation. Guiding significance.
Conclusion:
To sum up, the normal production of oil wells is not only related to the smooth exploitation of oil and gas resources, but also related to cost savings and economic benefits of the oil field. Therefore, it is necessary to conduct an in-depth analysis of especially the workover technology and combine it with the actual production conditions of the oil wells to target the Properly apply workover technology to carry out workover operations, and rationally select workover technology based on the workover situation to maintain the normal working status of the oil well. Continuously improve the production quality of oil wells, enhance the economic value of oil wells, and lay the foundation for the stable operation of oilfield enterprises.
Information source: Journal submission "China Science and Technology Talents" (Issue 13, 2023)
Read more: Causes and Preventive Measures of Oil and Water Well Casing Damage
