摘要
以大港油田某区块地质数据及生产动态为基础,建立了仿水平井(直井造长缝压裂)注水开发的概念模型。通过数值模拟方法对低渗透油藏仿水平井开发时地层层系划分标准进行了界定。从渗透率级差、黏度、地层流动系数级差、小层层数、射开井段长度等参数进行优化研究,发现仿水平井注水开发层系划分应遵循以下政策界限:(1)同一层系渗透率级差不应大于4;(2)原油黏度差别不应大于15mPa.s;(3)地层流动系数级差不应大于6;(4)一套层系内小层数目不应大于5;(5)油层射开井段长度最好不要大于50m。
Based on the geological data and production dynamics in a block of the DaGang oilfield, a conceptual model of water injection development of imitation horizontal well (vertical well made long seam fracturing) is established. The standard for the formation of horizontal wells in low permeability reservoir development is defined by numerical simulation method. We study and optimize the parameters such as permeability ratio, viscosity, formation flow coefficient differential, small layer layers and length of shot well section, and it is found that the following policy limits should be followed in the classification of the development layer of simulated horizontal well injection:(1) The permeability grade difference of the same layer should not be greater than 4,(2) The difference in viscosity of crude oil should not be greater than 15mPa.s,(3) The stratigraphic flow coefficient level should not be greater than 6,(4) The number of sub-layers within a set of layers should not be greater than 5,(5) The length of the well opening section of the oil reservoir should not be greater than 50m.
作者
张会卿
周宗良
何书梅
黄芳
张文静
丁亚军
ZHANG Hui-qing;ZHOU Zong-liang;DING Ya-jun(Exploration&development research institute of Dagang oilfield,Tianjin,300280,China)
出处
《新疆石油天然气》
CAS
2019年第2期59-62,I0004,共5页
Xinjiang Oil & Gas
基金
中国石油天然气股份有限公司重大科技专项(2012E-06)
关键词
低渗透
仿水平井
层系划分
渗透率级差
地层流动系数
Low permeability
Imitation horizontal well
Layer division
permeability contrast
Formation flow coefficient
