Application of high water cut late phase stratified oil recovery technology in petroleum engineering

Single-pipe layered oil recovery technology

There are generally two key methods in the staged oilfield technology used in oilfield engineering operations: one is single-pipe and the other is multi-pipe. Due to the high utilization rate of oilfield engineering operations, during actual engineering operations, partitions and production devices are usually used to reduce negative loss effects, and the remaining crude oil pipelines are immediately entered into the well, so that each material pipeline is fully exposed to the excavation period, effectively improving the use of oil Efficiency and avoid hidden dangers in oil field engineering operation.

Before the second half of oilfield production and manufacturing is divided into engineering operations, professional and technical personnel are assigned to observe the ecological environment around the oilfield production process area, check the corresponding landform structure, water content and other parameters, and scientifically arrange production planning according to the recorded parameters. On the premise of relevant operating steps, the multi-tube oil field processing technology was scientifically and standardizedly clarified, and the hierarchical structure of oil and gas wells was analyzed in depth. According to the specific conditions of oil and gas field production, scientific research and development methods should be planned rationally and overall to minimize the harm caused by the structure between oil layers. The packer can protect the structure of each oil layer, and the manufacturing regulator can assist in the excavation of the oil field and the division of the industrial structure of the oil field. According to the integrated design of production and manufacturing regulators, packers and grade classification production machines, the level and economic benefits of crude oil and surface technology development have been greatly improved.

For the application of single-tube layered oil production technology, the overall goal is to effectively divide the oil field to generate new oil layers to achieve efficient production results. At the same time, the production distributor and packer must be used. Only in this way can the crude oil production process be independent of each other and not affect the target, thereby ensuring high mining efficiency. In addition, the single-pipe classification technology commonly used in oil extraction is also a oil layer classification technology for oil and gas wells with high water content. In actual application, the application effect can be improved in an orderly manner, and the workload can be greatly reduced. At the same time, when applying this technology in practice, the application of packers is also very important. Comprehensive distributors can greatly improve efficiency and reduce the interference factors generated in the decentralization process from the source. Therefore, this method must be used to analyze oil and gas field projects to form different levels, and targeted application of technical measures based on each level can provide a higher guarantee for oil extraction efficiency.

Multi-tubular layered oil recovery technology

In the second half of oil and gas field production, multi-tube layered oil recovery technology is generally used. It can protect the oil layer more effectively through some methods to improve oil field performance and product quality. In the process of petroleum development, the multi-pipe delamination technology generally uses multiple fuel pipes to enter oil and gas wells at the same time, excavates each subdivided oil layer structure, and then uses separation equipment to simultaneously reach the designated oil layer for each fuel pipe for development. , thereby minimizing the mutual influence on each reservoir structure.

Compared with single-tube technology, the impact of arcing between oil layers is relatively reduced, and the utilization rate is also higher than that of single-tube technology. However, because multi-tube technology is generally limited to wellbore stratification, the number of production strings usually depends on the area of the field and the wellbore size. With the development trend of engineering construction, the number of steering columns is also increasing. Therefore, the construction difficulty of the original machine development and design has increased, and the equipment safety management and application problems have increased. In addition, the wellbore area of the oil and gas well itself is relatively small, so deep water wells The number of fuel pipes in the well is greatly limited, so the number of steering columns extending into the well cannot be too many, and the effect of oil and gas field work and the quality of the oil are often limited to the number of downhole operations. However, by reviewing the relevant research on oil operations over the years It was found that by using double-cylinder technology to form a water plugging pipe string, the sliding sleeve switch in the oil and gas well was controlled to ensure that the leakage plugging stage and the deepwater well water source search process were carried out at the same time, and the blocking mud layer was corrected in time to improve leakage plugging. The effect is based on the hierarchical synchronous oil absorption production process, which reduces the pressure between oil layers and optimizes the extraction work of the bottom oil and gas fields, thereby reducing product development time and costs, reducing the construction difficulty of oil development, and further improving the company’s Operating effect.

The research and development of oil exploration will be affected and restrained by geographical conditions, and there are many scattered oil reservoirs, which will increase the difficulty of development and design. If the one-by-one development method is applied, the development and design effect will be slower, which will increase the project cost. The application of layered oil recovery technology can carry out certain development and design for different oil reservoirs. Installing different types of waterproof casings in the wells and carrying out targeted development and design of each oil layer can greatly improve the economic benefits of oil extraction and effectively guarantee the project cost.

In addition, when implementing multi-tube grade classification oil fields, the most important problem is the management of the total output of oil pipelines. Because when multiple pipelines are working at the same time, there will be a certain difference in the total output of the upper and lower oil pipelines, which will increase the difficulty of the work. In addition, during mining, a lot of residues will often be produced, which will have a certain impact on the quality of the oil field. Before the details are implemented, it is necessary to fully understand the actual situation of the oil reservoir to prevent the occurrence of series connection of oil layers. At the same time, in the oil field, it is necessary to accurately calculate the specifications of oil and gas wells to effectively limit the utilization rate of oil pipelines and strengthen the implementation of engineering projects to achieve more scientific and reasonable utilization results.