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IMPROVEMENT OF OIL RECOVERY BY JET AND ELECTRICAL CENTRIFUGAL PUMPING TECHNOLOGY OF WATER/GAS INFLUENCEстатья Исследовательская статья
- Автор: Telkov V.P.
- Сборник: SPE Annual Technical Conference and Exhibition
- Год издания: 2007
- Первая страница: 114332
- Последняя страница: 114332
- DOI: 10.2118/114332-STU
- Аннотация: IntroductionWaterflooding is one of the main techniques of oil fields development but this means does not often provide high effectiveness of oil recovery. It comes into particular prominence in the development of high viscosity oil fields when water channels to producing wells and so a great part of oil reserves is not involved in displacement process.It is known that oil recovery factor can be increased if combined pumping of water and gas is used for oil displacement when the method of water/gas influence is applied. This technique can be used for utilization of associated gas burned in many oil fields the combustion materials of which pollute air.Nowadays various water/gas influence technologies are known. They are compressor-type technology, uncomressor-type technology, technology using special booster pumps for injecting water/gas mixture (WGM) and technology using jet apparatus. But all these technologies have not gone forward because of their imperfections.Selecting a water/gas influence technologyFirstly Water-Alternating-Gas Injection (WAG) technologies known should be described.Compressor WAG technology (fig. 1) injects gas to the bottom of a pumping well through tubing by means of high pressure compressor (or compressor station, if a few compressors are used). Water goes from a pumping station through the annulus. The main reason why this technology has not gained ground is high pressure compressor. First, the cost of this system unit is fairly high what restricts its application in little fields. Secondly, high qualified personnel are required to operate this complicated unit. Thirdly, reliability of a separate unit and of the system as a whole reduces dramatically because of complexity of this equipment. Besides, this technology has a high risk of gas channeling to the bottom of producing wells. It results in difficulties when operating producing wells.Another method is uncompressor WAG Technology using gas from high pressure gas layers (fig. 2). This technology can be used when a well runs through two reservoirs: gas and oil layers. Internal space of a well is equipped with a packer; additional production tubing is lowered to lift up gas from layer to surface. Then the mixture of gas and water injected goes down in the oil layer. The main defect of this technology consists in the fact that high pressure gas layer in developing field is required. Moreover the system includes complicated underground equipment and this makes difficulties for operating and reduces reliability the whole system. There is also a high risk of gas channeling to producing wells when using this technology.
- Добавил в систему: Телков Виктор Павлович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | SPE-114332-STU.pdf | 320,4 КБ | 25 октября 2020 [TelkovViktor] |