Equipment of stratified sand-control technology and technology of polymer stratified injection into a well of an offshore oil field
The traditional technique of polymer injection into wells due to poor effect of oil displacement pays negative impact on oil production of offshore oil fields during oil replacement by polymers injection. So, bearing in mind the above-mentioned fact, low shearing filtration pipe that provides sand-control and double control safety valve used for double pipe stratified injection of polymer were developed on the basis of sand-control technology of big diameter and technology of double pipe stratified injection of polymer into a well. Stratified sand-control technology and technology of stratified polymer injection at offshore oilfields were studied. The results of offshore oilfield experiment witness the fact that use of the equipment of stratified sand-control technology and technology of stratified injection of a polymer brought 100 % success, more than 85 % due to polymer viscosity retention rate, moreover, pressure of polymer injection into a well was relatively low.