时变油藏地质模型下剩余油分布的数值模拟研究

长期注水冲刷会引起储集层物性和流体物性的变化。以胜坨油田胜二区沙二段7^4-8^1单元为研究对象，建立该开发单元储集层物性和原油物性随不同开发阶段变化的时变油藏地质模型，研究开发阶段变化对剩余油分布和开发效果的影响。研究结果表明，渗透率场、原油黏度和密度随不同开发阶段的变化对剩余油分布和油田开发效果影响均较大，尤其是原油物性变化的影响更为严重。通过精细油藏数值模拟，得到目前7^4-8^1单元的剩余油分布规律和水淹状况，设计了该单元开发调整方案，成功地指导了油藏开发调整。表9参13

Reservoir simulation of remaining oil distribution based on time-variant reservoir model

Long-term water flooding would result in the variation of reservoir characteristics and crude properties. The time-variant model of unit 7~(4)-8~(1) of Region 2, Shengli Oilfield, with reservoir characteristics and crude properties varying with the development of the unit, is established and the influence of development stage on remaining oil distribution and development efficiency is studied with reservoir simulation. The result shows that variation of permeability, crude viscosity and density, especially the variation of crude properties, strongly influences remaining oil distribution and recovery. The fine reservoir simulation of the unit 7~4-8~1 is carried out to determine the remaining oil distribution and water-out situation.