非平行界面地层水平井自然伽马测井蒙特卡罗模拟  

Monte Carlo Simulation of Natural Gamma Logging in Horizontal Wells with Non-parallel Interfaces

作　　者：王港 秦臻 苏可嘉 胡雪琴 魏康健 邓呈祥 WANG Gang;QIN Zhen;SU Keja;HU Xueqin;WEI Kangjan;DENG Chengxiang(Jiangxi Nuclear Geoscience Data Science and System Engineering Technology Research Center,East China University of Technology,330013,Nanchang,PRC;State Key Laboratory of Oil and Gas Reservoir Geology and Development Engineering,610059,Chengdu,PRC;Key Laboratory of Structure and Oil and Gas Resources,430074,Wuhan,PRC;Hubei Provincial Key Laboratory of Multi-scale Imaging of the Earth's Interior,430074,Wuhan,PRC;Nuclear Industry 270 Research Institute,330200,Nanchang,PRC)

机构地区：[1]东华理工大学江西省核地学数据科学与系统工程技术研究中心,南昌330013 [2]油气藏地质及开发工程国家重点实验室,成都610059 [3]构造与油气资源教育部重点实验室,武汉430074 [4]地球内部多尺度成像湖北省重点实验室,武汉430074 [5]核工业二七〇研究所,南昌330200

出　　处：《江西科学》2023年第3期478-481,527,共5页Jiangxi Science

基　　金：国家自然科学基金项目(41804097);江西省自然科学基金资助项目(20224BAB203044);江西省大学生创新创业训练计划立项项目(S202110405028);教育部产学合作协同育人项目(221001592090942);东华理工大学教学改革研究课题(DHJG-20-13);东华理工大学实践教学类建设项目(DHSY-202227)。

摘　　要：在水平井随钻测井地质导向工作中,地层上下界面往往不是理想的平行状态,继续沿用以往平行界面地层模型的认识将影响此类地层中的地质导向效果。为此,基于蒙特卡罗方法,建立水平井非平行界面地层模型;利用模型正演研究了非平行界面不同夹角、层厚和仪器偏心情况下非平行界面地层模型中的自然伽马测井响应特征。结果表明,在所探讨的不同地质条件下地层界面倾斜均会对自然伽马测井造成一定程度的影响,且界面倾角越大影响越严重。研究结果可为非平行界面地层下实时地质导向和测井解释校正工作提供参考和借鉴。In the geosteering work of logging while drilling in horizontal wells,the upper and lower interfaces of the formation are often not in an ideal parallel state.Continuing to use the previous un-derstanding of the formation model with parallel interfaces will affect the geosteering effect in such formations.For this reason,based on the Monte Carlo method,the author establishes the formation model of non-parallel interface in horizontal wells;The response characteristics of natural gamma logging in the non-parallel interface formation model with dfferent angles,layer thickness and tool eccentricity were studied by using model forward modeling.The results showed that under the differ-ent geological conditions discussed,the formation interface dip would have a certain degree of impact on natural gamma logging,and the greater the interface dip,the more serious the impact.The re-search results can provide reference and reference for real-time geosteering and logging interpretation and correction under non-parallel interface formation.

关 键 词：水平井 非平行界面 自然伽马测井 正演模拟 蒙特卡罗方法 

分 类 号：P631.8[天文地球—地质矿产勘探]