【作者】 赵延静；

【导师】 张煜； 林承焰；

【作者基本信息】 中国石油大学 ， 矿产普查与勘探， 2010， 硕士

【摘要】 葡北油田78-54块葡I油组发育三角洲内前缘水下分流河道成因砂体,砂体窄而薄,造成砂体井控程度低,单层钻遇率仅在30%-40%左右,凭借目前地球物理技术和开发井网难以实现窄薄砂体井间储层的预测,基于此,论文开展了精细油藏地质建模研究。在研究区丰富的钻井资料及精细三维地震解释的基础上,对窄薄砂岩油藏井间储层几何形态和空间配置关系以及油藏内部各种属性参数的分布特征进行了精细表征,建立了高精度储层地质模型,最终达到模型精度高、不确定性最小的目的。论文在随机实现的基础上建立储层发育概率模型,通过截值计算实现不同概率下的岩相模型,优选各个模型中误差最小的沉积单元,最终组合成最优的模拟实现,进而对沉积相模型进行优化调整。抽稀井检验表明,该建模方法平均砂体预测符合率为80%,最低能分辨厚度为0.2m的砂体,达到了精细建模的目的,实现了对窄薄砂体的准确预测。在储层属性建模方面,论文从沉积形成与演化的成因角度出发,采用多参数协同、分层次约束的方法,用沉积相带的平面展布和垂向演化约束储层属性建模,即采用多参数综合一体化方法建立储层参数模型。模型检验方面,主要采用概率分布一致性检验、抽稀井检验及动态验证方法,从各个角度对模型进行验证,最终优选最符合地质特征的模拟实现。结果表明,多信息综合储层地质建模是解决窄薄砂岩油藏井间砂体发育状况难以预测问题的有效方法,对指导老油区剩余油挖潜,提高采收率具有重要意义。更多还原

【Abstract】 Sand developed in the underwater distributary channel with the delta front in 78-54 blocks of PI oil group in Northern Putaohua Oilfield, the sand narrow and thin , caused low control of well, the delta front rate only 30%-40% in a single layer.Narrow thin sandstone reservoirs are difficult to predicted with current geophysical technology and development well. So thesis carried out detailed reservoir geological modeling.Basing on fine 3D seismic interpretation and using the method of well-log and seismic data, the paper characterize detailedly geometry shape and spatial distribution of the narrow and small sandstone reservoir, and distribution feature of various attribute parameter in internal reservoir in order to set up high-precision reservoir geological model. The goals of the study is to obtain high model precision and the least uncertainty.In this thesis, based on stochastic realization,lithofacies probability model was developed,and facies model under different probability achieved from cut-off value. The sedimentary units with minimun error were elected through statistical analysis of the various models. Finally, the best simulation was achieved. The vacuated well test showed that the average compliance rate of sand prediction is 80% in the best simulation, which could distinguish 0.2m sand thickness. The results achieved the requirements of fine modeling,which accurately predicted the narrow-thin sand。Reservoir property Geo-modeling process is constrained by the distribution of sedimentary facies in plane and vertical evolution from the genetic aspect of formation and evolution of sedimentary, which using multi-parameter coordination and hierarchical constraint approach.In the model validation aspect, the model is verified from all angles such as the probablity of consistency test,the vacuated well test and dynamic stata validation Finally optimize the most realistic gelogical simulation realization.Research shows that combined reservoir gelogical modeling is a practical way to resolve the prediction for the sandbody’s development situation between wells in narrow-thin sandstone reservoirs, which is vital to remaining oil producing in the old oilfield and enhanced oil recovery.更多还原