论文部分内容阅读
为了研究砂岩气藏开发过程中岩石应力敏感性特征及其对生产指标的影响,结合常规钻井取心过程中岩石应力变化过程以及气藏衰竭开采过程孔隙压力下降特征,建立了砂岩气藏储层岩石受力物理模型,分析了气藏开发过程中储层岩石应力“时、空”变化特征,测试了苏里格、须家河等气田储层岩石渗透率应力敏感性;再结合典型低渗致密砂岩气藏储层物性及地质特征,选取不同渗透率岩心进行组合,建立了气藏开发物理模拟实验流程和方法,开展了气藏衰竭开采模拟实验,研究了储层岩石应力敏感性对气井稳产能力、产量递减特征、储量动用速度及采出程度等气藏开发指标的影响,取得了一些新认识,对砂岩气藏科学开发具有一定指导意义。
In order to study the characteristics of rock stress sensitivity during the development of sandstone gas reservoirs and its impact on production indexes, combining with the process of rock stress variation during coring of conventional drilling and the pore pressure drop characteristics during the depletion of gas reservoirs, sandstone gas reservoirs Rock physical model was used to analyze the change characteristics of reservoir rock stress, time and space during gas reservoir development, and to test the stress sensitivity of reservoir rock permeability in gas fields such as Sulige and Xujiahe. Combined with typical The reservoir physical properties and geological characteristics of low permeability tight sandstone gas reservoirs are selected, and the cores with different permeability are selected for combination. The physical simulation experiment procedure and method for gas reservoir development are established, and the failure experiments of gas reservoirs are carried out. The stress sensitivity of reservoir rock Some new understandings have been obtained on the development indexes of gas reservoirs, such as the stable productivity of gas wells, the characteristics of decreasing production, the rate of reserve utilization and the degree of recovery of production, which is of guiding significance to the scientific development of sandstone gas reservoirs.