扣13断块生物灰岩油气藏提高采收率研究

EOR countermeasures research of fractured limestone
reservoir

 程时清1 王银珍2 唐恩高1 安小平2 杨天龙

中国石油大学教育部石油工程重点实验室，北京102249 长庆油田公司，陕西西安710021

扣13断块是典型的裂缝性生物灰岩，地下构造破碎，有些区块注采井网难以完善，储量动
用差，油井投入开发后很快进入特高含水期，开发效果差，采出程度为9.18%。通过对整个油田开发动态
的分析，找出了影响裂缝性生物灰岩断块油气藏开发效果的因素，认清了断块的油水流动关系，以及注
水驱替情况和油层剩余油分布规律。运用油藏数值模拟方法，进行了精细的历史拟合，提出了提高采收
率对策。生物灰岩油藏可以采取周期注水、改变液流方向等水动力学方法提高水驱波及程度，同时充分
利用老井侧钻技术进行调整挖潜，改变开发方式，增加注水井，完善注采井网，能大大提高复杂小断块油
藏的开发效果。

Block Kou 13 is typical fractured limestone with broken
underground structure,flooding networks in some blocks are difficult
to improved, Producing reserves is poor, a high water cut is soon
appears after production, development effect is so poor and the
recovery is only 9.18%. The impact factors of fractured limestone
reservoir development is found, the oil-water flow relationship,the
flooding situation and remaining oil distribution are seen clearly
through dynamic analysis. The EOR countermeasures are proposed
with fine history match. A summary of limestone reservoir is
concluded. Cyclic water flooding,the direction change of water flow
can be taken to enhance the water flooding sweep degree. While
making full use of the old lateral drilling wells, alternating
development mode, increasing injection wells and improving
flooding network, the effect of small fault block reservoir
development can be improved greatly