缝洞型碳酸盐岩油藏开发早期合理采油速度模型

对于缝洞型碳酸盐岩油藏,衰竭式开发是最合理的开采方式。对于衰竭式开采,在制定开发方案时,确定合理采油速度尤为重要。研究中根据其他相同类型油田的成功开采实例,选取尽可能多的影响因素,采用多元逐步回归分析方法,得到了一个缝洞型碳酸盐岩油藏开发早期合理采油速度模型。此模型包含了流体性质和地层参数,与关于固有地质情况对采油速度影响的物理概念并不矛盾,并且适应面广,可对衰竭式开发早期缝洞型碳酸盐岩油藏的合理采油速度做出初步结论。用数值模拟方法证明,这个模型可用于现场实际。

THE STUDY ON REASONABLE O IL RECOVERY RATE MODEL OF FRACTURE-VUG TYPE CARBONATE RESERVO IR IN THE EARLY DEVELOPMENT PERIOD

The depletionmethod is themost reasonable method to exploit fracture-vug type carbonate reservoirs. In the case of developmentby depletion, it is especially important to determine a reasonable oil recovery rate when stablishing reasonable development plan. In this paper, according to successful development cases ofother similar fields, many affecting factors are taken into account and multiple-stepwise-regression analysismethod is used to derive a reasonable oil recovery ratemodel of fracturevug type carbonate reservoir in the early development period.Thismodel includes fluid properties and reservoirparameters and is consistentwith physical concept that indicates inherent geological conditions'effect on oil recovery rate. It can bewidely used and draw a primary conclusion on reasonable oil recovery rate of fracture-vug type carbonate reservoir in the early depletion developmentperiod. Numerical simulationmethod is used to prove that thismodel is applicable to field practice.