摘要
针对目前研究变形特低渗油藏合理井距的局限性,首先建立了油藏压力和产量幂率积分关系的非线性渗流模型,然后根据叠加原理,提出了求解变形介质特低渗油藏合理井距的新方法。该方法在求解过程中利用牛顿迭代原理建立了不同储层渗透率和采油强度下的合理注采井距理论图版。同时,讨论了启动压力梯度以及介质变形对注采井距的影响。研究表明,在储层物性和工作制度一定时,应存在一个合理注采井距范围;油藏开发过程中应尽可能提高采油强度,从而减小启动压力梯度对井距的影响。以上研究成果为有效开发特低渗油藏提供了理论依据。
According to limitation of studying well spacing of deformation medium in ultra-low permeability reservoirs, non-linear power law flow model involving pressure and productivity is established firstly, and then a new method of studying reasonable well spacing is presented with principle of superposition. In the process of resolution, theoretical charts of reasonable well spacing based on different reservoir permeability and production intensity are established with Newton iteration method, and the affection of starting pressure gradient and deformation medium on injection-production well spacing is discussed. Study indicated that there should be a reasonable well-spacing limit with a certain physical property and working system. ; production intensity should be enhanced as possible that would decrease influence of starting pressure gradient on well spacing. The above result would provide theoretical foundation for developing ultra--low permeability reservoirs effectively.
出处
《内蒙古石油化工》
CAS
2009年第16期145-148,共4页
Inner Mongolia Petrochemical Industry
关键词
变形介质
特低渗油藏
启动压力
合理井距
Deformation Medium
Ultra-low Permeability Reservoir
Starting Pressure
Reasonable Well Spacing
