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

作　　者：程时清[1] 王银珍[2] 唐恩高[1] 安小平[2] 杨天龙[1] 

机构地区：[1]中国石油大学教育部石油工程重点实验室,北京102249 [2]长庆油田公司,陕西西安710021

出　　处：《断块油气田》2007年第6期34-36,共3页Fault-Block Oil & Gas Field

基　　金：国家自然科学基金项目油藏渗流反问题理论及剩余油分布规律研究(19172961)资助。

摘　　要：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.

关 键 词：生物灰岩 断块油气藏 数值模拟 

分 类 号：TE346[石油与天然气工程—油气田开发工程]