摘要
安塞油田PQ油藏属于特低渗透油藏,油藏开发递减快、稳产难度大。区域砂体发育、油层厚度大,存在纵向油层未动用状况,为了进一步挖潜剩余油,提高PQ油藏开发效果,油井补孔已成为油田老区稳产及挖潜的主要途径之一。针对不同层位的历年措施进行效果进行分析,总结出各层位出油下限;分析地层系数、孔隙度、原始含油饱和度以及地层压力对补孔效果的影响,建议下步补孔措施选井时,优选油层物性好、地层系数为4~10、孔隙度大于11%、含油饱和度大于45%、地层压力大于7 MPa的油井,也为后期补孔压裂措施达到更好的效果提供理论依据。
PQ reservoir belongs to a ultra-low permeability reservoir,with rapid decline in reservoir development and high difficulty in stabilizing production.With the development of regional sand bodies and large thickness of oil layers,there exists the condition of vertical oil layer not being utilized.The sand body is developed,the oil layer thickness is large,but oil layers in vertical direction is not used.In order to further tap the remaining oil potential and improve the development efficiency,well filling has become one of the main ways to stabilize production and tap potential in old oilfield areas.Based on the analysis of measures effect in different layers over the years,the lower limit of oil production in each layer is summarized.The influence of formation coefficient,porosity,original oil saturation and formation pressure on the filling effect is analyzed.It is suggested that the wells with good reservoir physical properties,formation coefficient of 4~10,porosity greater than 11%,oil saturation greater than 45%and formation pressure greater than 7 MPa should be selected for the next step,which provides a theoretical basis for the later perforation fracturing measures to achieve better results.
作者
黄易泽
刘国栋
李洲
杨婕
李玉波
HUANG Yize;LIU Guodong;LI Zhou;YANG Jie;LI Yubo(School of Earth Sciences and Engineering,Xi’an Shiyou University,Xi’an 710065,Shaanxi,China;Shaanxi Key Laboratory of Petroleum Accumulation,Xi’an 710065,Shaanxi,China;No.1 Oil Production Plant of Changqing Oilfield Company,PetroChina,Yan’an 716000,Shaanxi,China;Petroleum Engineering Technology Research Institute of Henan Oilfield Company,SINOPEC,Nanyang 473000,Henan,China)
出处
《石油地质与工程》
CAS
2024年第2期88-92,共5页
Petroleum Geology and Engineering
关键词
补孔压裂
含油饱和度
油层物性
措施效果
perforation and fracturing
oil saturation
physical properties of oil reservoir
measures effect
