火驱尾气CO2含量与燃烧状态对应关系研究  

Relationship between CO2 Content of Tail Gas and Combustion State in Fire-Flooding

作　　者：孙洪军[1,2] 程海清 宋扬[1,2] Sun Hongjun;Cheng Haiqing;Song Yang(PetroChina Liaohe Oilfield Company,Panjin,Liaoning 124010,China;National Energy Heavy Oil R&D Center,Panjin,Liaoning 124010,China)

机构地区：[1]中国石油辽河油田分公司,辽宁盘锦124010 [2]国家能源稠(重)油开采研发中心,辽宁盘锦124010

出　　处：《特种油气藏》2019年第5期76-80,共5页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项“辽河、新疆稠油(超稠油)开发技术示范工程”(2016ZX05055)

摘　　要：针对火驱尾气CO2含量界限与高温氧化状态关联性不明确的问题,利用自主研制的火烧油层物理模拟装置,以D66块为研究对象,开展了不同氧化程度样品的高温氧化实验,探索了CO2含量与燃烧状态对应关系。研究结果表明:原油、低温氧化过的原油、焦炭3种样品400℃高温氧化产生的CO2含量分别为12.29%、13.88%、17.98%,即原油氧化程度越高,其高温氧化产生的CO2含量越高,主要原因是低温氧化形成的含氧化合物在高温氧化过程中被转化为CO2。作为直接的判识指标,当CO2含量超过15.00%时可界定为高温燃烧。利用该指标分析了D66块先导试验井组与平面燃烧状态波及情况。结果表明,39%油井实现高温燃烧,转驱时间较长井组燃烧状态较好,井组匹配率可达70%以上。该项研究可为生产动态调控、火驱方案调整提供技术支持。A self-developed physical simulation device for the fire-flooding was used to clarify the correlation between the CO2 content limit of tail gas and high-temperature oxidation state in fire-flooding.The Block D66 was taken to carry out the high-temperature oxidation experiments (400 ℃) with core samples in various oxidation levels and explore the correlation between CO2 content and combustion state.Research indicates that The CO2 contents of crude oil,crude oil with low-temperature oxidation and coke after the high-temperature oxidation are 12.29%,13.88% and 17.98% respectively.The CO2 content during high-temperature oxidation increases with the increase of crude oil oxidation level.The major reason is that the oxygenates produced by low-temperature oxidation are converted to CO2 during high-temperature oxidation.As a direct indicator,it can be defined as high-temperature combustion when the CO2 content exceeds 15.00%.The CO2 content of tail gas was used to evaluate the lateral combustion state and sweep efficiency of the pilot test well-groups in the Block D66.High-temperature combustion has been achieved for the 39% of oil production wells.The well-groups with long-term fire-flooding period show favorable combustion state and the well-group matching rate exceeds 70%.This research could provide certain technical reference for production regulation and the fire-flooding program adjustment.

关 键 词：燃烧状态 判识指标 CO2含量 物理模拟 高温氧化 D66块 

分 类 号：TE345[石油与天然气工程—油气田开发工程]