Studied on The Influence of Well Structure on Stress Distribution of Bent Casing in Thermal Production Horizontal Well

Steam injection process has been widely applied to enhance oil rate in thermal heavy oil production. But the different well structures have large influence on casing stress distribution, especially on bent part, which can reduce casing service life. During steam injection, the casings with different well structure sustain different thermal stress, especially to bent casing, which can cause casing damage and severely affect oil production and economic benefit. The influence of well structure on stress distribution of bent casing in thermal production horizontal well was studied through numerical simulation. The results can provide theoretical guidance to analyze casing stress status and prevent casing damage.