深层油气勘探开发需求与尾管悬挂器技术进步

The Demands on Deep Oil/Gas Exploration & Development and the Technical Advancement of Liner Hangers

深层油气勘探开发中,存在地质条件复杂,地层坚硬、研磨性强,井眼失稳严重,固井封固段长和间隙小等问题,这对尾管固井技术提出了更高要求。为应对深层尾管固井中尾管下入更深、负荷更大,尾管下入更加困难,井底温度更高、压力更大,以及井下环境更加恶劣等带来的挑战,十多年来国内进行了持续攻关和创新,取得了一系列重要进展—尾管悬挂器的功能从基本型、保险型、增强型,发展到了集成型;研制了内嵌式卡瓦、可旋转及液压丢手、平衡式双液缸、高压封隔和多功能集成型悬挂器,满足了深层油气开发需求,取得了显著的现场应用效果。与此同时,研制的各种尾管悬挂器,为顺北油气田、元坝气田、涠洲油田和川西地区等深层复杂油气田的规模化开发提供了固井技术支撑,并起到了很好的推动作用。综合研究认为,由于材料、信息、控制和制造等相关领域技术不断进步,尾管悬挂器技术以后将向集成化、智能化、信息化和实时化发展,从而满足更深层油气勘探开发的需求,支撑石油天然气工业持续、健康、快速发展。

Deep oil and gas reservoirs encounter complex challenges in exploration and development, which include complex geological conditions, hard strata, high abrasivity, severe wellbore instability, long cementing sealed hole section, narrow gap, and more. These problems impose higher requirements for liner cementing technology. In order to more effectively address the difficulties such as larger liner setting depth, higher load in liner cementing, more difficult in liner RIH, higher bottom-hole temperature, higher pressure, and more severe downhole environments, over ten years of continuous research and innovation, a series of major breakthroughs have been achieved in China. The functions of the liner hanger have evolved from the basic ones to enhanced and integrated types, including the hanger structures of built-in slip, rotatable and hydraulic releasing, balanced double-cylinder, high-pressure sealing, and more. In addition, a multi-function integrated hanger has been developed to satisfy the demands of deep strata development and significant field application results have been achieved. At the same time, the developed liner hangers have provided cementing technical supports for the large-scale development of deep complex oil and gas fields such as the Shunbei Oilfield, Yuanba Gas Field, Weizhou Oilfield and Western Sichuan, further, they have accelerated the effective development of those oil/gas fields. After conducting comprehensive research and taking into consideration continuous advancement in materials, information, control and manufacturing, liner hanger technologies will target integration, intelligence, data science and real-time monitoring to ensure the effective exploration & development of deep oil and gas reservoirs and to support the sustained, healthy and rapid development of the petroleum industry.