边底水油藏开采动态分析——以姬塬油田延5油藏为例

The dynamic analysis of oil reservoir with edge and bottom water: taking the Jiyuan Oilfield Yan 5 Oil Reservoir as an example

姬塬油田延5油藏具有活跃的边底水,开采过程中,边部井含水上升,影响产能,因此需要探究合理的开发技术政策。本文以姬塬油田延5油藏为例,通过生产动态数据等资料,对姬塬油田延5油藏的生产现状、油井产能、含水分布及变化、地层能量变化以及注水开发进行分析,为下一步探究合理的开发技术政策提供可靠依据。结果表明,油藏整体的产能随着开发年限的增加而减少。单井产能的影响因素主要为物性,产能递减类型符合指数递减,递减较慢,油藏整体含水上升,地层能量随着开采时间的推移逐渐下降。油藏开采早期可以进行天然能量方式进行开采,随着地层能量的递减后期采用注水开发来补充地层能量,注水时机可以采取推迟注水方式。

Jiyuan oilfield Yan5 oil reservoir has active edge and bottomwater.The edge of water cut is risingin the processing of mining which affect the production capacity.So we need to explore somereasonable development technology policy.This paper takes the Jiyuan oilfield Yan5 oil reservoir as an example,analyzedthe Jiyuan oilfield Yan5 oil reservoir's production status,oil well productivity,water distribution and change,the formation energy and water injectionthrough the production dynamic data information.Which provide the reliable basis for the next step to explore the development of reasonable technology policy.The results show that the overall reservoir capacity is reducingwith the increasing development age.The influence factors of single well production capacity mainly for the physical property,the type of production decline is the exponential thatdecreasing slowly.The overall reservoir water cut rise quickly,the formation energy graduallyis declining by the pass of time.The early oil reservoir can be exploited by the natural energy.Along with the formation energy is diminishing,the late water injection can be used to complement the formation energy,the injection time can be taken by the delayed way.