EOR development skills

Before the 1940s, oil field development relies mainly on natural energy consumption mining, the general recovery of only 5% -10%, we are called primary recovery. It reflects the development of oilfields in the early low level of technology, so that about 90% of proven oil reserves left in the ground was abandoned. With the development of percolation theory, Food dehydrator applies to oilfield development. It is recognized that oil production is proportional to the pressure gradient between a low oil recovery is a major factor in the failure of energy reservoirs, which made the artificial recharge (gas), maintaining reservoir pressure of secondary recovery methods to make oil recovery to 30% -40%. This is by far the world's major oil fields development methods, field development is technically a big leap. However, secondary recovery still 60% -70% of oil left to stay underground. To this end, domestic and foreign oil workers, a lot of research work, and gradually realize the secondary oil refinery efficiency constraints of reason, which made the new EOR methods. Theory and field tests are described, tertiary oil recovery efficiency can be greatly improved. But generally speaking, the world is still in the EOR pilot study stage, has yet to enter the large-scale industrial applications. The main reason, one tertiary oil recovery mechanism is very complex, involving multi-disciplinary, multi-disciplinary; another very important reason is the high investment and risks. Today, the development of our attention and tertiary oil recovery technology, can greatly increase the contrast a variety of methods recoverable reserves determined