With the increasing demand for controllable source logging,research on data-processing algorithms that meet accuracy requirements has become key to the development of controllable-source-logging tools.This study theor...With the increasing demand for controllable source logging,research on data-processing algorithms that meet accuracy requirements has become key to the development of controllable-source-logging tools.This study theoretically derives the relationship between the formation density and inelastic gamma count rate to investigate the data-processing methods for deuterium–tritium(D–T)source neutron-gamma density logging while drilling.Then,algorithms for the net inelastic gamma count-rate extraction and neutron transport correction are studied using Monte Carlo simulations.A new method for fast-neutron effect identification and additional correction is proposed to improve the density-calculation accuracy of gas-filled and heavy-mineral formations.Finally,the effectiveness and accuracy of the proposed data-processing methods are verified based on simulated and measured data.The results show that the density-calculation accuracy of water-bearing conventional formations in simulated data is±0.02 g/cm^(3).The accuracy of gas-filled and heavy-mineral formations after the additional fast-neutron effect correction is±0.025 g/cm^(3).For the measured data from the actual tool,the algorithms perform well in the density calculation.The density results obtained using the processing algorithms are consistent with the density data provided by NeoScope.Therefore,the D–T source neutron-gamma density-logging algorithms proposed in this study can obtain relatively accurate data-processing results for a variety of formations.This study provides technical support for engineering applications and the development of logging tools for controllable-source neutron-density logging.展开更多
传统的测井施工质量安全监督管理主要依赖现场人员的监督检查,但这种方式存在诸多弊端。围绕打造世界一流中国石油测井(China Petroleum Logging,CPLog)测井装备目标,基于远程监控平台的车辆管理系统GPS监控、车载数据中心企业信息服务...传统的测井施工质量安全监督管理主要依赖现场人员的监督检查,但这种方式存在诸多弊端。围绕打造世界一流中国石油测井(China Petroleum Logging,CPLog)测井装备目标,基于远程监控平台的车辆管理系统GPS监控、车载数据中心企业信息服务器EISS系统(Enterprise Information Server System,EISS)及LEAD测井资料解释处理平台(Log Evaluation and Analysis Desktop, LEAD)为基础,构建了测井施工质量安全综合管理平台,经研究表明,该体系可通过远程监控技术,实时获取测井施工过程中的各项数据,实现对施工质量和安全的全方位、全过程监督管理。结合文献研究法、实地调研法、系统分析与设计法、实验验证法,使远程监控平台实现了对测井施工质量安全的全面监督管理,提高了监督管理的效率和准确性,为行业解决测井监督管理相关问题提供了借鉴。展开更多
基金supported by the Natural Science Foundation of Shandong(ZR2022MD019)Technology Development Project of China Oilfield Services Limited(G2317A-0414T077)+3 种基金Science and Technology Project of China National O shore Oil Corporation(CNOOC-KJ GJHXJSGG YF 2022-01)Open Fund Project of CNPC Logging(CNLC2022-9C06)Fundamental Research Foundation for Central Universities(22CX01001A-2)China National Petroleum Corporation Scientific Research and Technology Development Project(2021DJ3801)。
文摘With the increasing demand for controllable source logging,research on data-processing algorithms that meet accuracy requirements has become key to the development of controllable-source-logging tools.This study theoretically derives the relationship between the formation density and inelastic gamma count rate to investigate the data-processing methods for deuterium–tritium(D–T)source neutron-gamma density logging while drilling.Then,algorithms for the net inelastic gamma count-rate extraction and neutron transport correction are studied using Monte Carlo simulations.A new method for fast-neutron effect identification and additional correction is proposed to improve the density-calculation accuracy of gas-filled and heavy-mineral formations.Finally,the effectiveness and accuracy of the proposed data-processing methods are verified based on simulated and measured data.The results show that the density-calculation accuracy of water-bearing conventional formations in simulated data is±0.02 g/cm^(3).The accuracy of gas-filled and heavy-mineral formations after the additional fast-neutron effect correction is±0.025 g/cm^(3).For the measured data from the actual tool,the algorithms perform well in the density calculation.The density results obtained using the processing algorithms are consistent with the density data provided by NeoScope.Therefore,the D–T source neutron-gamma density-logging algorithms proposed in this study can obtain relatively accurate data-processing results for a variety of formations.This study provides technical support for engineering applications and the development of logging tools for controllable-source neutron-density logging.
文摘传统的测井施工质量安全监督管理主要依赖现场人员的监督检查,但这种方式存在诸多弊端。围绕打造世界一流中国石油测井(China Petroleum Logging,CPLog)测井装备目标,基于远程监控平台的车辆管理系统GPS监控、车载数据中心企业信息服务器EISS系统(Enterprise Information Server System,EISS)及LEAD测井资料解释处理平台(Log Evaluation and Analysis Desktop, LEAD)为基础,构建了测井施工质量安全综合管理平台,经研究表明,该体系可通过远程监控技术,实时获取测井施工过程中的各项数据,实现对施工质量和安全的全方位、全过程监督管理。结合文献研究法、实地调研法、系统分析与设计法、实验验证法,使远程监控平台实现了对测井施工质量安全的全面监督管理,提高了监督管理的效率和准确性,为行业解决测井监督管理相关问题提供了借鉴。
