深水综合录井方法实践与应用研究

发布时间：2018-07-27 17:22

【摘要】：海洋钻井通常将水深超过500m的井称为深水井,超过1500m的井为超深水井。针对深水井无论从钻井作业、钻井资料收取、作业安全等方面均存在不同的挑战。本文阐述了深水井录井的所面临的各种挑战以及应用何种录井技术来应对深水录井所面临的难题。深水录井所面临的挑战通常具有以下几点:钻井液返出温度低,使用较长、较粗的隔水管,为了满足钻井液上返速度需在泥线处放有增压泵,影响录井迟到时间计算及对地质录井、气测录井等录井技术的影响;深水环境影响,包括潮汐、波浪、内波流以及洋流等因素对工程录井的影响;深水井复杂的井筒信息对整个录井资料收集造成的影响;深水井远离陆地,高投资、高风险,对录井系统稳定性、资料安全性提出了新的挑战。深水井由于上覆压力小势必造成作业压力窗口小,在作业中如何准确地监测地层压力、破裂压力以及控制钻井液循环当量密度是深水录井面临的难题。针对深水录井以上挑战和影响,提出深水综合录井解决方案。深水录井采用目前最先进的智能综合录井仪geoNEXT以及早期井涌井漏监测系统EKD来监测井筒复杂情况;FLAIR实时地层流体分析录井技术,消除低温对钻井液脱气显示低气显示,便于进行地层油气评价;PreVue监测系统实时监测地层压力和破裂压力,有效地指导现场钻井液的调整;应用三维定量荧光、地化录井、X衍射全岩分析、元素录井等相关录井新技术对地层岩性和油气评价起到了积极的作用。通过中国南海近50口井的深水录井作业实践,逐步总结和探讨出一套符合深水录井的录井技术组合:geoNEXT+EKD+FLAIR+PreVue以及结合有效的岩样和荧光鉴定手段,进行岩性鉴定与地层评价,油气显示发现与油气层评价,工程参数监测和异常预报以及随钻压力监测及应用。根据目前中国海洋勘探和开发形势,深水作业将是整个海洋钻井的重心,中国深水录井未来势必也是向这一方向发展。中国深水录井必须适应勘探形势的需要,突破地面,完善信息工程,建立井场、远程平台一体化系统,系统整合,精细化油气层评价方法,深水随钻录井将是未来发展的趋势。
[Abstract]:Offshore drilling usually refers to wells with water depth over 500m as deep wells and wells over 1500m as ultra-deep wells. There are different challenges for deep wells in terms of drilling operation, drilling data collection and operational safety. In this paper, the challenges faced by deep well logging and the mud logging techniques used to deal with the problems faced by deep water logging are described. The challenges of deep-water mud logging usually include the following: drilling fluid return temperature is low, long and coarse riser is used, in order to satisfy the drilling fluid return velocity, a pressurized pump is placed at the mud line. It affects the calculation of mud logging late time and the influence of geological logging, gas logging and other logging techniques, the influence of deep-water environment, including tide, wave, internal wave current and ocean current, on engineering mud logging. The influence of complex wellbore information on the whole mud logging data collection, the deep well being far from land, high investment and high risk pose a new challenge to the stability of logging system and data security. Because the overlying pressure of deep well is small, the operating pressure window will be small. How to accurately monitor formation pressure, fracture pressure and control drilling fluid cycle equivalent density is a difficult problem for deep water mud logging. In view of the above challenge and influence of deep water logging, the solution of deep water integrated logging is put forward. Deepwater mud logging adopts the most advanced intelligent integrated logging tool geoNEXT and the early wellbore leak monitoring system (EKD) to monitor the complex condition of wellbore and flair real-time formation fluid analysis logging technology to eliminate low gas display for drilling fluid degassing at low temperature. It is convenient to monitor formation pressure and fracture pressure in real time with PreVue monitoring system for formation oil and gas evaluation, to effectively guide the adjustment of drilling fluid in situ, to apply 3D quantitative fluorescence, and to analyze the whole rock by X-ray diffraction of geochemical logging. New logging techniques, such as element logging, play a positive role in formation lithology and oil and gas evaluation. Through the practice of deep-water mud logging in nearly 50 wells in the South China Sea, a set of logging technology combination: geoNEXT EKD FLAIR PreVue, which accords with deep-water mud logging, and effective means of rock sample and fluorescence identification, are gradually summarized and discussed for lithology identification and formation evaluation. Oil and gas discovery and reservoir evaluation, engineering parameter monitoring and abnormal prediction, and monitoring and application of drilling pressure. According to the current situation of marine exploration and development in China, deep-water operations will be the center of gravity of the whole offshore drilling, and China's deep-water mud logging will certainly develop in this direction in the future. Deep-water mud logging in China must meet the needs of exploration situation, break through the ground, perfect information engineering, establish well site, remote platform integration system, system integration, fine oil and gas reservoir evaluation method. Deepwater logging while drilling will be the future development trend.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE142;TE52

【共引文献】