火驱同心双管分层注气管柱研制及试验

doi:10.3969/j.issn.1006-6535.2020.04.023

摘要/Abstract

摘要： 针对目前分层火驱注气管柱存在高温和常温频繁转换情况下密封失效及分层注气滑套有时打不开的问题,开展了火驱同心双管分层注气管柱的研制。该分层注气管柱采用同心双管的方式进行分层注入,利用可熔阀芯和可熔垫环,形成不同注气阶段内外管的注气通道,利用高回弹耐高温密封胶筒进行层间密封,具有密封可靠,操作便利的特点。现场应用2井次,达到了分层火驱的目的。该技术能够有效解决分层火驱的密封问题,改善火驱前缘剖面,提高火驱波及体积,具有推广价值。

关键词: 分层火驱, 同心双管注气管柱, 耐高温封隔器, 可熔式开关滑套, 稠油, 火烧油层

Abstract: The development of a fire flooding concentric dual-tube zonal gas injection string was conducted to improve the failures of sealing and zonal gas injection sliding sleeve under frequent conversion between high temperature and normal temperature for the zonal fire flooding gas injection string. A concentric dual-tube string was adopted in the zonal gas injection to establish the inner and outer gas injection channels in different stages by using a fusible valve core and a fusible backing ring. A high resilience and high temperature resistant sealing rubber cylinder was used in zonal sealing, which is characterized by reliable sealing performance and convenient operation. It had been successfully applied for 2 well-times in field zonal fire flooding treatment. This technology could effective improve the sealing performance and the front profile and enhance the swept volume in zonal fire flooding treatment, which is worthy of wide promotion.

Key words: zonal fire flooding, concentric dual-tube gas injection string, high temperature resistant packer, fusible switch sliding sleeve, heavy oil, in-situ combustion

中图分类号:

TE358

冷冰. 火驱同心双管分层注气管柱研制及试验[J]. 特种油气藏, 2020, 27(4): 149-155.

Leng Bing. Development and Test of Concentric Dual-tube ZonalGas Injection String in Fire-Flooding[J]. Special Oil & Gas Reservoirs, 2020, 27(4): 149-155.

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