摘要
济阳坳陷陆相断陷湖盆页岩油油气资源丰富,裂缝发育,勘探开发潜力巨大。裂缝对页岩油开发的有利方面表现为能有效提高页岩油储层的产能,而不利方面主要是增加了钻井难度,造成钻井过程中井涌井漏频发,严重影响了钻井的效率,因此裂缝的准确预测是该区块页岩油勘探开发中亟需解决的主要问题。文中开展了纵波反射系数各向异性理论的分析,利用正演模拟研究了页岩储层裂缝方位、裂缝角度、裂缝组系等对反射系数特征的影响,同时结合研究区页岩油裂缝的发育特征和分布规律,利用OVT域数据研究分方位道集叠加及地震属性差异,并进行叠前AVAZ反演预测裂缝的发育特征。与实际的钻井情况及成像测井结果对比表明,叠前各向异性反演预测的裂缝结果可靠性高,可为后续的页岩油勘探开发提供有效的技术支持。
The shale oil in the continental faulted lake basin of Jiyang Depression is rich in oil and gas resources,with developed fractures and great potential for exploration and development.The advantage of fracture for shale oil development is that it can effectively improve the productivity of shale oil reservoir,while the main disadvantage is that it increases the difficulty of drilling,resulting in frequent well kicks and well losses,which seriously affects the efficiency of drilling.Therefore,the accurate prediction of fractures is the main problem to be solved in the exploration and development of shale oil in this block.In this paper,the anisotropy theory of reflection coefficient of P-wave is analyzed,then the influence of fracture orientation,fracture angle and fracture group on the reflection coefficient characteristics of shale reservoir are studied by forward simulation.At the same time,combined with the development characteristics and distribution laws of shale oil fractures in the study area,OVT domain data is used to study the azimuth track set superposition and seismic attribute difference,and pre-stack AVAZ inversion is carried out to predict the development characteristics of fractures.The comparison with the actual drilling conditions and imaging logging results shows that the fracture results predicted by the inversion of pre-stack anisotropy have high reliability,which can provide effective technical support for the subsequent shale oil exploration and development.
作者
王静
束青林
杜玉山
张强
朱惠永
WANG Jing;SHU Qinglin;DU Yushan;ZHANG Qiang;ZHU Huiyong(Exploration and Development Research Institute,Shengli Oilfield Company,SINOPEC,Dongying 257015,China;Working Station for Postdoctoral Scientific Research,Shengli Petroleum Administrative Burea,Dongying 257000,China;Shengli Oilfield Company,SINOPEC,Dongying 257100,China)
出处
《断块油气田》
CAS
CSCD
北大核心
2024年第6期1031-1038,共8页
Fault-Block Oil & Gas Field
基金
中石化博士后课题“东营凹陷页岩油裂缝地震预测方法研究”(YKB2304)
中国石化重点科技攻关项目“页岩油地质精细评价技术研究”(P24031)。
关键词
页岩油
正演模拟
各向异性分析
叠前AVAZ反演
裂缝预测
shale oil
forward simulation
anisotropy analysis
pre-stack AVAZ inversion
fracture prediction
作者简介
第一作者:王静,女,1985年生,在站博士后,主要从事地震资料解释方法以及页岩油裂缝预测方法研究。E-mail:r_wj@163.com。
