石油钻采工艺2016，Vol.38Issue(3)：347-351,5.DOI:10.13639/j.odpt.2016.03.014
考虑应力场变化的水平井压后产能计算方法--水平井井筒沿最小主应力方向
Post-fracturing productivity computation method of horizontal well with consideration to stress ifeld variation：along the minimum principal stress in horizontal wellbore
摘要
Abstract
The effect of reservoir stress variation on the fracture morphology is usually not considered in the simulation calculation on staged fracturing productivity of horizontal wells in low permeability and ultra-low permeability oil and gas reservoirs, leading to large calculation errors. In this paper, the 2D induced stress ifeld computation model was combined with the estimated staged fracturing time interval in each stage to calculate the effect of the existing artiifcial fractures on the stress ifeld variation and predict the artiifcial fracture morphology in subsequent fracturing. Then, based on the prediction results, a geologic model was established, and the 3D three-phase black-oil model was used to calculate the post-fracturing productivity of horizontal wells. Finally, a staged fracturing productivity computation method of horizontal wells with consideration to the stress ifeld variation in case of existence of artiifcial fractures was deifned. According to the study results, when the stress ifeld variation is considered, the artiifcial fracture morphology would change obviously, from the expected transverse fractures to T-like artiifcial fractures, and some transverse fractures would be far away from the planned perforation location. The ifeld application in the JM reservoir shows that the ifve-year cumulative production of horizontal wells obtained with consideration to the existence of 8 transverse fractures is 5.6% different from that without consideration to the stress ifeld variation. This veriifes the necessity that the stress ifeld variation should be considered in calculating the staged fracturing productivity of horizontal wells.关键词
低渗透/特低渗透/水平井分段/应力场/产能模拟Key words
low permeability/ultra-low permeability/horizontal well section/stress ifeld/productivity simulation分类
能源科技引用本文复制引用
杨立峰,钟太贤,陈超峰,丁云宏,刘哲..考虑应力场变化的水平井压后产能计算方法--水平井井筒沿最小主应力方向[J].石油钻采工艺,2016,38(3):347-351,5.基金项目
国家科技重大专项“低渗、特低渗油气储层高效改造关键技术”（编号2011ZX05013-03）；中国石油天然气股份有限公司科技重大专项“特低、超低渗油藏高效改造关键技术研究”（编号2011B-1202）。 （）
