喇萨杏油田剩余储量潜力分析及挖潜方向

Potential analysis and potential tapping direction of the remained reserves in Lasaxing oilfields

建立了利用水驱特征曲线和相对渗透率曲线结合计算各类井地质储量的新方法并对喇萨杏油田各类井地质储量进行了测算。采用动静结合的方式, 分析了喇萨杏油田剩余储量分布特点, 明确了油田进一步调整挖潜的方向。研究了喇萨杏油田水驱分类井控制剩余可采储量比例、含水、采油速度等开发状况, 分析了目前开发中存在的主要问题和矛盾, 针对各类井网目前含水接近的情况, 论证了满足一定产油量约束下的各类井产液比例与产油比例尽量接近于它们的地质储量比例时控水效果最好。应用此结论, 研究了喇萨杏油田水驱分类井优化结构调整开发方式。

A new method to calculate OOIP of each kind of oil well is established by means of integrating waterflood characteristic curve and relative permeability curve.At the same time,the above reserves in each kind of oil well have been calculated.By combination of dynamic and static data,the distributary feature of remained reserves in Lasaxing oilfields has been analyzed, and further adjusting and tapping directions have been made clear.The development situation of remained recoverable reserves proportion, water cut,oil production rate and so on controlled by waterflood classified wells in Lasaxing oilfields is studied, and then the current existing main problem and contradiction during oilfield development are analyzed. In the light of the reality of nearly same water cut in these wells,the follow conclusion is drawn:under the condition of meeting a certain oil production requirement,when fluid production proportion of the above wells is near to their OOIP proportion, the effect of water control is the best.With the help of this conclusion,development pattern adjustment and structure optimization of waterflood classified wells in Lasaxing oilfields have been studied.