摘要
为深入了解层间非均质性对油田水驱开发效果的影响,采用层间非均质三维物理模型进行室内水驱油实验,研究高、中、低渗层3层组合下,驱替压差、开采方式对不同渗透率储层的水驱效果。实验结果表明,随着驱替压差的增加,中、低渗层水驱波及效果越来越明显,高渗层水驱波及效果变化不大,提高驱替压差能有效启动中、低渗层的剩余油,合理的驱替压差对非均质性严重的储层开发有重要影响。不同开采方式对采收率影响较大,3层同采时采收率最低,高渗层的优势通道给中、低渗层的开发带来困难,分层系单采采收率最高,实际生产中有必要采取分层开采等措施来提高中、低渗层水驱开发效果。实验结果有效指导了渤海南部垦利A油田层系调整及增产措施制订,同时研究成果对后续新油田的方案编制及油田开发有重要指导意义。
In order to deeply understand the influence of interlayer heterogeneity on waterflood development effect of oilfield, the three dimensional physical model of interlayer heterogeneity was used to carry out laboratory water displacing oil experiment, and study the waterflood effect of displacement pressure difference and exploitation mode on different permeability reservoirs under the combination of high, middle and low permeability layers. The experimental results show that with the increase of displacement pressure difference, the waterflooding sweep effect of middle and low permeability layers becomes more and more obvious, while that of high permeability layer changes little;the increase of displacement pressure difference can effectively start the remaining oil in middle and low permeability layers, and the rational displacement pressure difference has an important effect on the development of highly heterogeneous reservoirs. Different exploitation modes have great influence on recovery factor;when the 3 layers are produced simultaneously, the recovery factor is the lowest;the dominant channel in high permeability layer brings difficulties to the development of middle and low permeability layers, and the recovery factor of separate layer production is the highest;therefore, in real production, it is necessary to take measures like separate layer production to improve the waterflood development effect of middle and low permeability layers. The experimental results effectively guide the adjustment of series of strata and the formulation of stimulation treatment of Kenli A oilfield in the south of the Bohai Sea, meanwhile, the study achievements are of great significance to the plan preparation and development of the future new oilfields.
作者
阳晓燕
Yang Xiaoyan(CNOOC Tianjin Company, Tianjin 300459, China)
出处
《特种油气藏》
CAS
CSCD
北大核心
2019年第2期152-156,共5页
Special Oil & Gas Reservoirs
基金
"十三五"国家科技重大专项"渤海油田高效开发示范工程"(2016ZX05058)
关键词
层间非均质性
三维水驱实验
驱替压差
开采方式
层系调整
增产措施
渤海油田
interlayer heterogeneity
three dimensional waterflooding test
displacement pressure difference
exploitation mode
adjustment of series of strata
stimulation treatment
Bohai Oilfield
