石油钻采工艺2016，Vol.38Issue(6)：848-851,858,5.DOI:10.13639/j.odpt.2016.06.026
风城浅层油砂SAGD项目注汽压力优化
Optimization of steam-injection pressures in Fengcheng shallow oil sand SAGD Project
摘要
Abstract
To accelerate pre-heating and initialization of SAGD circulation for development of Fengcheng shallow oil sand, en-hance development of steam chambers during initial production and optimize steam injection pressure in different stages, elastic me-chanics and distribution of stress in reservoir formation were analyzed based on geomechanic and formation stress tests, the correlation between steam injection pressure and shear strength was determined in accordance with the Mohr-Coulomb Theory, and features of shear fractures in Fengcheng oil sand were highlighted through CT scanning. Research results show that shallow Fengcheng oil sand has rigidity and shear dilation decreasing with temperature. By enhancing steam injection pressure, it is possible to reduce effective stress and accelerate formation of vertical micro-fractures in oil sand. During SAGD, the minimum steam injection pressure can be determined with shear strength at 1.5 times of the stress circle, whereas the maximum steam injection pressure can be determined at upper limit of the stress circle. In conclusion, it is proposed to use high steam injection pressure during pre-heating and initial production stages, whereas lower steam injection pressure can be used during peak production stages. Field application results show satisfactory performances can be achieved through process optimization.关键词
浅层油砂/SAGD/注汽压力/Mohr-Coulomb准则/岩石力学/抗剪强度/微裂缝Key words
SAGD/steam injection pressure/Mohr-Coulomb Theory/geomechanics/shear strength/shallow oil sand/micro-fracture分类
能源科技引用本文复制引用
黄勇,张磊,何小东,杨洪,陈森,游红娟..风城浅层油砂SAGD项目注汽压力优化[J].石油钻采工艺,2016,38(6):848-851,858,5.基金项目
“十三五”国家科技重大专项“油砂高效开发与提高SAGD效果新技术研究与应用”（编号2016ZX05031002）。 （）
