提供一流的浅水辅助钻井井口平台,开创了新的篇章

Michael Michael, W. Chow, Khian Aik Loh
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引用次数: 0

摘要

本文展示了另一个成功的案例,即交付了一种新型的同类最佳的招标辅助钻井(TAD)井口平台。一个明确的目标/目标,以实现项目价值驱动程序,即。降低资本支出,加快项目成熟速度。通过演示良好的前端开发工作和从项目一开始就制定的项目交付策略,一系列战略方法可以提供具有竞争力的范围和要求,目的是通过满足上层和下层结构的目标减重来实现成本节约和最小化制造时间。所有这些战略方法的最终目的是为新的TAD井口平台制定一套标准模板设计和有效的项目执行策略,并可在壳牌复制。壳牌的土木、结构和海洋工程学科利用过去的项目良好实践、经验教训和针对内部和外部项目的基准来开发适合目的的设计。基准研究的初步结果表明,在沙捞越水域的水深为143米时,夹克通常是启动安装的。持续的改进练习旨在减少上部和下部结构的重量,最终为套套从最初的发射安装转变为提升安装创造了机会。这一改进过程中取得的一些关键成功包括上层甲板水平/占地面积优化、优化上层结构框架和甲板腿间距,以使顶部的工作点更小、消除护套假腿从而减少整体护套占地面积/重量、精益基础设计,例如每条腿1个裙边桩等。然而,在140m水域安装导管套的关键挑战仍然是导管套的提升重量,这受到典型重型船舶起重机能力的限制,并且需要严格的天气窗口限制。因此,重量管理(即在套管举升重量上设置NTE重量)至关重要,需要从工程阶段一直管理到海上安装。持续改进的结果显示了令人满意的效果,节省了项目成本和进度。由于套管重量大幅减少(>50%),因此缩短了制造时间表,并释放了堆场灵活性,从而吸引了EPC承包商(特别是小型制造商)更具竞争力的投标,从而潜在地降低了EPC的总成本。钢材量的显著提高,降低了整体夹套钢材的采购成本和制造成本。通过滑动装置消除夹套负载(用于发射型夹套),进一步降低制造成本。这是壳牌马来西亚公司在该水域安装的第一个升降机式套管。壳牌利用项目知识和学习,制定了L2 TAD井口平台设计和安装辅助设备的具体技术规范,旨在标准化和简化技术要求。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Delivering Best-In-Class Shallow Water Tender-Assisted Drilling Wellhead Platform, a New Chapter
This paper demonstrates another success story on delivering a new Best-In-Class Tendered Assisted Drilling (TAD) Wellhead Platform. A clear target/goal to achieve project value driver, ie. reduce CAPEX and accelerate project maturation speed. With demonstration of good front-end development work and project delivery strategies set from the beginning of the project, a series of strategic approach to deliver competitive scoping and requirement with the intent of achieving cost saving and minimize fabrication duration by meeting targeted weight reduction for both Topside and Substructures. The ultimate purpose of all these strategic approaches is to develop a set of standard template design and efficient project execution strategy for new TAD Wellhead platform that is replicable in Shell. Civil, Structural and Offshore Engineering discipline in Shell has leveraging past project good practices, lesson learnt and benchmarking against internal and external project to develop a fit-for-purpose design. Initial findings from the benchmarking study indicated at water depth of 143m in Sarawak water, jackets are launch-installed, typically. The continuous improvement exercises aimed to reduce both Topsides and Substructure weight, which eventually creates opportunity for jacket to convert from launch-installed in the initially concept to lift-installed jacket. Some of key successes from this improvement journey includes topside deck level/footprint optimization, optimized topside structural framing and deck leg spacing to have a small work-points from top, elimination of jacket dummy leg thus reduce overall jacket footprint/weight, lean foundation design, e.g. 1 skirt pile per leg etc. However, the key challenge to the lift-installed jacket concept at the water region of 140m remains at jacket lift weight that is limited by the typical heavy lift vessel crane capacity and it requires a stringent weather window limit. Hence, weight management, i.e. set NTE weight on the jacket lift weight is paramount and it needs to be managed from engineering phase all the way to offshore installation. The outcome of the continuous improvement journey showed tremendous satisfying result to save project cost and schedule. With massive reduction of jacket weight (>50%) thus it reduces fabrication schedule, and unlocks provision of yard flexibility that invites more competitive bidding from EPC contractors (especially small fabricator) thus potentially reduce overall EPC cost. The significant improvement in steel quantity reducing overall jacket steel material procurement cost and fabrication cost. Elimination of jacket loadout via skidding facility (for launch type jacket) that further reduces fabrication cost. This is the first lift-installed jacket in Shell Malaysia at this water region. Leveraging on project knowledge and learning, specific technical specifications for L2 TAD Wellhead Platform design and installation aids have been developed in shell, with the intent to standardize and simplify technical requirements.
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