STUDY AND APPLICATION OF THE SAND CONTROL TECHNOLOGY USING STAINLESS STEEL COTTON

The sand is produced seriously in the heavy oil thermal recovery well in Henan oilfield.The conventional wire-wrapped screen cannot control the fine silt,and then the sand-removal is frequently operated in this oilfield.In view of the above,the stainless steel cotton sand control equipment used to control the fine silt is developed as a result of study for more than three years.Compared with the SWC filter made in Canada,it has the advantages such as the higher closeness,thinner filter framework,less raw material and higher permeability and conductivity.Based on a large number of indoor static and dynamic simulation tests,the mechanism of sand control using stainless steel cotton is thoroughly studied and discussed,and then the theory about this technique is presented in this paper.This theory is verified in laboratory and field tests,and the remarkable economic and social benefits are obtained in the field applications.