论文部分内容阅读
描述了深水完井作业面临的困难,如何设计工具和工艺过程才能获得最佳可靠性和最佳寿命的完井设计,给出了巴西海上油田油井、Campos盆地深水井、墨西哥湾深水井完井的一些实例。讨论的问题主要是油井设计、泵注作业、压裂充填设计、选择长寿命筛管及防止地层污染的液流体系。裸眼斜井完井和水平井完井一直以来是减少作业成本、提高采收率的主要方法,因为这样的油井与油藏会有最佳的接触面积,把该项技术与智能完井体系结合使用可以减少钻井数量,满足油井产能最大、油藏泄油能力最佳的要求。在巴西海上油田,通过裸眼完井已成功地开发出很多储量。完井类型有水平生产井和注入井、砾石充填、独立筛管完井、具有环空隔离及结合智能完井的裸眼砾石充填。从全球范围来讲,目前的技术能成功让砾石充填横向段长度超过8300ft,水深超过6100ft。压裂充填作业在墨西哥湾深水水域的进一步加大促使石油工程技术致力于满足高渗透地层压裂作业的更高要求。压裂充填在深水区域内作业要求泵注速率在60bbl/min以上,支撑剂浓度为15ppa。为了解决当今深水作业领域日益增长的需求和风险管理,研究人员开发了一些特殊工具和数据软件。技术的发展正在降低作业风险,增加作业可靠性,提高原油采收率。
A well completion design describing the difficulties encountered in deepwater completion operations and how tools and processes are designed to achieve the best reliability and life expectancy is given for offshore wells in Brazil, deep wells in the Campos Basin, deepwater wells in the Gulf of Mexico Some examples. The main issues discussed were well design, pumping work, fracturing filling design, long-life screens, and fluid flow systems to prevent formation contamination. Open-hole and horizontal well completions have been the primary means of reducing operating costs and increasing oil recovery because such wells have the best contact area with the reservoir, combining the technology with an intelligent completion system Use can reduce the number of drilling to meet the maximum production capacity of wells, reservoir drainage capacity of the best requirements. In Brazil offshore oilfields, a lot of reserves have been successfully developed through open-hole completion. Completion types include horizontal production wells and injection wells, gravel packs, stand-alone screen completions, annulus gravel isolation and openhole gravel packing combined with smart completion. Globally, the current technology has succeeded in allowing gravel packs to cross transverse sections of more than 8300 ft in length and more than 6100 ft in depth. The further expansion of fracturing and filling operations in the deep waters of the Gulf of Mexico has led to the petroleum engineering technology devoted to meeting the higher requirements of high-permeability formation fracturing. Frac packings in deep water areas require pumping rates above 60bbl / min and proppant concentrations of 15ppa. To address the growing demand and risk management in today’s deepwater operations, researchers have developed special tools and data software. Technology development is reducing operational risk, increasing operational reliability and increasing oil recovery.