双河油田三叠系开发井网数值模拟与确定

双河油田三叠系属于低压低渗油藏,该油藏的物性差、产能低、并且具有天然裂缝和人工裂缝,这都制约了该油田的高效开发,科学合理的井网部署是解决这一问题的关键。为此,文章综合考虑了双河油田基质渗透率和压裂后裂缝渗透率之间的渗透率级差和各向异性,采用了三维三相黑油模型,数值模拟计算了两种采油速度下三种井网方案的开发指标。比较了采油速度、地层压力、综合含水率和采出程度等指标,确定了双河油田低渗透储层合理开发的井网为井网Ⅰ。

Numerical Simulation and Definition on Reasonable Well Pattern for Developing Triassic Formation of Shuanghe Oilfield

Triassic Formation of Shuanghe oilfield belongs to low-pressure and low permeability reservoir, it has some features of poor physical properties, low productivity, natural cracks and artificial cracks. All these characteristics restricted the oilfield high efficiency developing. In this paper, the permeability differential and aeolotropism between matrix material permeability and fractured crack permeability of the Shuanghe Oil-field were comprehensively considered, the triaxial-three phases black oil type simulation model was used, the development indexes of three well pattern projects in two production rates were also simulated and calculated, and the oil recovery rate, formation pressure, composite water ratio and degree of reserve recovery index in different well patterns were compared. In the end, the reasonable development well pattern was decided for the Shuanghe oilfield reservoir.