稠油热采伴生气物质来源及影响因素

doi:10.3969/j.issn.1006-6535.2022.03.009

摘要/Abstract

摘要： 针对注蒸汽热采过程中伴生气来源不清的问题,利用高温高压反应釜对辽河油田齐40块原油、岩心及地层水等样品开展室内实验,探索伴生气产生机理及影响因素。结果表明:原油是热采伴生气的主要物质来源,其主要发生水热裂解反应,储层矿物对水热裂解反应起催化作用;伴生气产生的起始温度为150 ℃,其产量随温度升高而增大,当温度达到300 ℃时水热裂解与稠油热裂解共同作用导致伴生气产量急剧上升;在250 ℃时,9 d后原油水热裂解反应基本完成,之后伴生气产量无明显增长。该研究可为稠油热采充分利用伴生气提供参考。

关键词: 稠油热采, 伴生气, 水热裂解反应, 物理模拟, 齐40块

Abstract: In response to unclear sources of associated gas during thermal stimulation by steam injection, laboratory experiments were conducted on crude oil, core and formation water samples from Block Qi 40, Liaohe Oilfield with high-temperature and high-pressure reaction still to explore the generation mechanism and influencing factors of associated gas. The study results showed that, crude oil was the main source of associated gas in thermal recovery and mainly took place in aquathermolysis, and reservoir minerals played a catalytic role in the aquathermolysis; the starting temperature of associated gas production was 150 ℃, and its production increased with the increase of temperature, when the temperature reached 300 ℃, the joint action of aquathermolysis and heavy oil pyrolysis led to a sharp increase of associated gas production; at 250 ℃, the aquathermolysis of crude oil was basically completed after 9 days, after which there was no significant increase in associated gas production. The study is of guiding significance for the full utilization of associated gas in thermal recovery of Liaohe Oilfield by steam injection.

Key words: thermal recovery of heavy oil, associated gas, aquathermolysis, physical simulation, Block Qi 40

中图分类号:

TE345

王国栋. 稠油热采伴生气物质来源及影响因素[J]. 特种油气藏, 2022, 29(3): 64-68.

Wang Guodong. Sources and Influencing Factors of Associated Gas in Thermal Recovery of Heavy Oil[J]. Special Oil & Gas Reservoirs, 2022, 29(3): 64-68.

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