摘要
海上油田多采用水平井开发且井距大,不同构型单元定量规模及其空间展布特征存在较大不确定性。为发挥水平井横向信息丰富的优势,利用岩心、测井、地震和生产动态等资料,基于水平井信息开展了辫状河储层构型单元空间展布特征研究。在构型单元划分与分析的基础上,利用成像探边资料标定了水平井测井相,综合考虑构造、水平井井轨迹位置、围岩影响等因素,构建了辫状河不同构型单元水平井测井相模式,厘清了其空间组合关系,并利用水平井信息验证了基于现代沉积和野外露头统计分析得到的构型单元定量规模经验公式。以沉积模式为指导,以构型单元地质知识库作为规模约束,采用水平井测井约束的地震波阻抗反演预测了砂体分布,按照"井震结合、厚度控制、规模约束"的思路完成了构型单元侧向划界,弄清了砂质辫状河储层内部构型单元空间展布,并通过油藏数值模拟验证了预测结果的可靠性。研究表明,水平井丰富的横向信息可以极大地降低井间储层预测和构型单元空间展布研究的不确定性。
Offshore oilfields are mostly developed by horizontal wells with large well spacing,and there are obvious uncertainties in the quantitative scale and spatial distribution of different configuration units.In order to make full use of the abundant lateral information in horizontal wells,the spatial distribution characteristics of configuration units of sandy braided river reservoir are studied based on horizontal well information,by using core,logging,seismic and production performance data.Based on the division and analysis of configuration units,the logging facies of horizontal wells are calibrated by using imaging edge detection data.The logging facies model of horizontal wells with different configuration units in sandy braided river can be established by considering the factors such as structure,horizontal well trajectory and surrounding rock influence,the spatial combination relationship can be clarified,and the quantitative scale empirical formula of the configuration units can be validated by horizontal well information according to the statistical analysis of modern sedimentation and field outcrop.Guided by depositional model,taking geological knowledge base of configuration unit as scale constraint,the distribution of sand body is predicted by seismic impedance inversion constrained by horizontal well logging.The lateral delimitation of configuration unit is completed according to the idea of"well-seismic combination,thickness control and scale constraint",the spatial distribution of internal configuration units of sandy braided river reservoir is clarified,and the reliability of prediction result is verified by reservoir numerical simulation.The research results show that the abundant lateral information of horizontal wells can greatly reduce the uncertainty of inter-well reservoir prediction and spatial distribution research of configuration units.
作者
权勃
侯东梅
牟松茹
杨建民
张文童
黄奇
QUAN Bo;HOU Dongmei;MOU Songru;YANG Jianmin;ZHANG Wentong;HUANG Qi(Bohai Petroleum Research Institute,CNOOC China Limited,Tianjin Branch,Tianjin 300459,China;Wuhan Times GeoSmart Science and Technology Co.,Ltd.,Wuhan,Hubei 430000,China)
出处
《中国海上油气》
CAS
CSCD
北大核心
2020年第4期96-103,共8页
China Offshore Oil and Gas
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(三期)-渤海油田加密调整及提高采收率油藏工程技术示范(编号:2016ZX05058-001)”部分研究成果。
关键词
辫状河
水平井
储层构型单元
空间展布
定量规模
braided river
horizontal well
reservoir configuration unit
spatial distribution
quantitative scale
