【作者】 王立新；

【导师】 殷代印； 蔡迎春；

【作者基本信息】 大庆石油学院 ， 石油与天然气工程， 2009， 硕士

【摘要】 葡萄花油田北部经过20多年的注水开发,先后经过了井网一次均匀加密和井网非均匀二次加密等开发调整过程,随着油田综合含水的不断上升,油井的采液指数在不断增大,为了保持注采平衡,需要不断增加水井的注水量,即增加注水井数。而葡北油田进入中高含水期的注采系统调整还没有开展过,因此,很有必要开展注采系统调整方法研究,通过开辟试验区以求找到最适应现开采条件下的调整方法,最大限度的提高水驱控制程度,增加原油可采储量,为油田可持续发展奠定物质基础。本文从葡北油田的实际出发,论述了注采系统调整的必要性和可行性,通过对葡北二断块的研究,目前葡北油田存在油水井数比大,油田地层压力水平恢复受到限制,油田产量递减快等问题,从油水井数比和开发指标情况看,需要进行注采系统调整。根据井网分布编制了五套注采调整方案,并分别进行了数值模拟,从模拟结果看,方案五最终采收率最高为40.68%,其次是方案一、二为38.36%和38.5%,其它几个方案与基础方案相差不大,前四套方案水驱厚度都有不同程度的损失,且转注井产量损失也大,因此我们选择方案五为执行方案,油田最终采收率由36.76%提高到39.70%,提高2.94个百分点。葡北二断块的现场实验共确定转注井26口,转注方案实施后周围油井的油层动用状况得到改善,调整区产量稳定回升,含水上升速度得到减缓,新增可采储量60多万吨,同时也为措施增产创造了有利条件,达到了预期的调整目标。通过研究表明,得出的一套低渗透窄小砂体油田中高含水期注采系统调整方法,可推广应用于大庆油田其它地质条件类似的油田,改善油田开发效果,带来可观的经济效益,具有广泛的适用性和推广性。更多还原

【Abstract】 By 20 years’waterflood development, north of Putaohua oilfield has actualized primary homogeneous infill exploitation regulation and secondary nonhomogeneous infill exploitation regulation to well pattern successively. Along with the incessant rising of composite water cut and ceaseless accretion of oil well’s fluid productivity index, oilfield need increase water well’s water injection rate ceaselessly (quantity of water injection well) to keep balanced offtake.However Pubei oilfield hasn’t developed injection-production system regulation in high water cut stage, so it is necessary to develop the research of injection-production system regulation method. By means of verifying the feasibility and effect of the method in experimental area, raising waterflood control degree farthest, increasing recoverable reserves of oil, establishing substantial foundation for sustainable development of oilfield.The article discusses the necessity and feasibility of injection-production system regulation from Pubei oilfield fact. Through the research to Pubei second BLK, it is knowable that Pubei oilfield exists many question , for example, the oil well quantity-water well quantity ratio is big, oilfield FMP level recovering is confined, the declining rate of oilfield output is quick. From observing The oil well quantity-to-water well quantity ratio and development index, we know oilfield need develop injection-production system regulation. The article draws up five injection-production regulation arrangements and proceeds numerical analogue respectively. Observing the analogue result, ultimate recovery factor of the fifth arrangement which is maximal is 40.68%,the first arrangement is 38.36% and the second arrangement is 38.5%,other arrangements are close to the base case. The waterflood thickness of the frontal four arrangements have different degree loss and conversion well output’s loss is big,so we choose the fifth arrangement as the execute case.The ultimate recovery factor is raised 2.94% (from 36.76% to 39.70%).Through the field conduct in Pubei second BLK, confirming 26 conversion wells together.After actualizing conversion arrangement, using status of oil layer is improved, output ascends steadily in regulation area, ascending velocity of cut slows down.it creats advantage for increasing production with measure.it achieves anticipative regulation aim.The research manifests the suit of injection-production system regulation method which is fit for low permeable sublayer narrow and small sandstone oilfield in high water cut stage can apply at other oilfield whose geologic condition resembles Daqing oilfield’s.It can improve oilfield development effect and bring considerable economic benefit,so it has broad applicability and generalized effect.更多还原