井筒信息一体化地层建模及地质导向技术

Borehole Information Integrated Formation Modeling and Geo-Steering Technology

利用随钻测井资料进行地质导向是定向钻井的前沿技术,由于目前随钻测井资料基本以无方位自然伽马、电阻率资料为主,因此,存在地层建模和地质导向的不确定性。鉴于录井资料可提供钻遇地层的原始资料,钻时和钻压资料可间接反映岩性和缝洞异常等,综合利用随钻测井、录井和钻井资料对钻遇地层进行评价和建模可以弥补单一随钻测井资料的不足。介绍了井筒信息和地层模型一体可视化技术,以及综合利用测井、录井、钻井资料进行储层评价、地层模型精细刻画和地质导向的方法与流程。应用实例表明,综合利用测井、录井、钻井资料进行地层精细刻画建模及地质导向是在缺少方位随钻测井资料条件下减少地层模型不确定性的有效方法。

Geo-steering with logging while drilling(LWD)data is the frontier of current directional drilling technology.However,current LWD data is almost dominated by no azimuth gamma ray and resistivity measurements,leading to uncertainty in geo-steering.In view of the fact that the mud logging data can provide the primary data of the strata encountered,the drilling time and bit weight can reflect the lithology and fracture cavity anomalies indirectly.Therefore,comprehensive utilizing the LWD,mud logging,and drilling information of borehole for real-time evaluation and interpretation of the drilled stratum becomes a favorable means to make up for the deficiencies of using LWD data alone.This paper introduces the comprehensive visualization technology of borehole information and formation model,as well as the method and technical process of utilization of logging,mud logging and drilling information together for reservoir evaluation,fine formation modeling and geo-steering.Application example shows that the comprehensive use of logging,mud logging and drilling information for formation modeling and geo-steering is an effective method to reduce the uncertainty of formation modeling in the absence of azimuth logging data while drilling.