Comprehensive laboratory and numerical investigation of SAGD completions

SAGD 完井的综合实验室和数值研究

• 批准号: 488486-2015
• 负责人: Nouri, Alireza
• 金额: $ 26.47万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=694877
• 关键词: Comprehensive; laboratory; numerical; investigation; SAGD

This proposal relates to the design optimization of petroleum wells in thermal operations. Thermal operations are used in Alberta and around the globe to heat thick heavy oils (bitumen), reduce their viscosity and allow their flow into the wellbore at economical rates. There are two major technologies for thermal operations: Steam Assisted Gravity Drainage (SAGD) and Cyclic Steam Stimulation (CSS). These wells are drilled in uncemented sand reservoirs and will collapse unless supported by pipes which also act as screens that allow the passage of fluids, but keep the sand grains in the formation. These pipe screens are called stand alone screen liners, or simply liners.There are different types of liners for thermal operations. These liners are supposed to prevent the reservoir sand from flowing into the wellbore, but allow the production of very fine materials (i.e. fine silts and clay) in the reservoir. Sand production in thermal wells, which usually are horizontal, will result in sand accumulation in the liner, requiring the wellbore to be frequently shut in for wellbore clean up. The sand, which is contaminated by oil, is costly to separate, clean, and dispose of once manually brought to the surface or transported by wellbore flow to the surface. The production of fines will result in higher wellbore productivity as, if they are not produced, they will plug the sand and the screen liner.The design of liners that allow the production of fines, but keep the sand in the reservoir is a delicate task. Liner design criteria have been developed in the past, but are inadequate and conservative, resulting in lower wellbore productivity. In this research, we propose the development of criteria for the design of three different common types of liners. The proposed research takes a comprehensive approach in enhancing the liner design for heavy oil reservoirs through fundamental and applied research using physical and mathematical modeling and state-of-the-art laboratory facilities at the University of Alberta.

该建议涉及热作业中石油威尔斯的设计优化。在阿尔伯塔和地球仪周围使用热操作来加热稠的重油（沥青），降低其粘度并允许其以经济的速率流入井筒。热采作业主要有两种技术：蒸汽辅助重力泄油（SAGD）和蒸汽吞吐（CSS）。这些威尔斯井是在未胶结的砂岩储层中钻探的，除非由管道支撑，否则这些井将坍塌，管道也起到了允许流体通过但将砂粒保持在地层中的筛网的作用。这些筛管称为独立筛管，或简称为筛管。有不同类型的筛管用于热作业。这些衬管应该防止储层砂流入井筒，但允许在储层中产生非常细的材料（即细粉砂和粘土）。通常为水平的热威尔斯井中的出砂将导致衬管中的砂积聚，需要频繁关井以进行井筒清理。被油污染的砂一旦被人工带到地面或通过井眼流运输到地面，分离、清洁和处置成本很高。细颗粒的产生将导致更高的井筒生产率，因为如果不产生细颗粒，它们将堵塞砂和筛管。允许产生细颗粒但将砂保持在储层中的筛管的设计是一项微妙的任务。过去已经制定了衬管设计标准，但这些标准不充分且保守，导致井筒产能较低。在这项研究中，我们提出了三种不同的常见类型的衬垫的设计标准的发展。拟议的研究采取了全面的方法，通过基础和应用研究，使用物理和数学建模和最先进的实验室设施，在阿尔伯塔大学提高重油油藏的衬管设计。