Analysis and Understanding of Erosion Effect about Christmas Tree in Moderate Sand Control Well

Aiming at the wellhead erosion problem caused by the production process of moderate sand control in Bohai oilfield, the corresponding CFD model was established and the non-uniform structured grid dividing was adopted based on the types of oil extraction trees commonly used in Bohai Oilfield. The flow channel erosion track of different fluid production, sand content and sand grain size were analyzed in order to identify the key area of the wellhead Christmas tree subject to erosion. The results show that the increase of sand content will aggravate the concentration of erosion area in the specific area of the inner wall of the tree, and the change of sand production particle size will also lead to the regular distribution of erosion location and maximum erosion rate.This research provides certain guiding significance for the safety inspection of Christmas trees and field safety production management in Bohai Oilfield.