摘要
地质导向是水平井钻井中保障沿着优质储集层钻进的重要支撑手段。传统的基于地层对比的地质导向技术所构建的导向模型通常难以提供精细且具有预测能力的地层构造模型、岩性分布模型及含油性分布模型,往往使导向工作出现偏差,引发优质储集层钻遇率低的问题。地震数据纵向分辨率虽低但具有层面横向控制能力,测井数据纵向层位虽精细但因井位少使其纵向地层延展性控制能力差,基于二者优点的井震联合构建三维地质导向模型技术,则可以提供更准确的三维地层模型和剖面导向模型,进一步结合随钻数据实时校正模型,即能够确保钻井轨迹位于薄砂层目的层中,指导钻井施工实现精准地质导向。三维建模技术、地层剖面建模与分析技术以及模型更新技术研究结果表明,在勘探开发中后期,钻井、测井、录井资料丰富的情况下,基于井震联合三维地质导向模型构建的地层剖面模型能够满足地质导向的精度要求,有效提高油气层钻遇率。
Geosteering is an important support to ensure drilling along high quality reservoirs in horizontal well drilling.The guidance model constructed by the traditional geosteering technology based on stratigraphic correlation is difficult to provide a fine and predictive stratal configuration model,lithologic distribution model and oil-bearing distribution model.It often leads to deviation in guiding work and causes low rate in drilling high-quality reservoirs.Vertical resolution of seismic data is low but has horizontal control ability.Log data are precise in the vertical horizon,but the control ability of their vertical formation ductility is poor due to the lack of well location.3 Dgeosteering model technology was constructed jointly based on the advantages of well logging and seismic.It can provide more accurate 3 Dstratigraphic model and profile guidance model and further combine with data while drilling to real-time correct model,that is,it can ensure that the drilling track is located in the target bed of thin sand layer,and guide drilling operation.The accurate geosteering is realized.The study results of 3 D modeling technology,stratigraphic profile modeling and analysis technology and model updating technology show that stratigraphic profile model based on 3 D geological model of well logging and seismic combination can meet the precision requirement of geosteering with abundant drilling,well logging and mud logging data in the middle and late stages of exploration and development,effectively improving the rate of drilling oil and gas reservoirs.
出处
《录井工程》
2018年第2期27-31,108,共5页
Mud Logging Engineering
基金
国家重大专项"低渗透储层高精度随钻成像技术研究"(编号:2016ZX05021-002)
中国石化集团科技部项目"水平井随钻地层实时评价研究"(编号:P-15170)
中国石化集团科技部项目"近钻头三维随钻导向解释技术研究"(编号:P-16018)
关键词
井震联合
三维地质导向
模型
动态校正
well logging and seismic combination
3D geosteering
model
dynamic correction
