杨智,廖静,高成国,冯利娟,杨凤祥,袁士宝
YANG Zhi,LIAO Jing,GAO Chengguo,FENG Lijuan,YANG Fengxiang,YUAN Shibao

• 1:中国石油新疆油田分公司勘探开发研究院
• 2:西安石油大学石油工程学院

摘要(Abstract)：

火烧油层过程中,各区带流体及储层高温变化特征对矿场生产控制有重要影响。基于火驱区带划分理论,利用现场取心与室内实验结合的方法,对取心井储层进行了火烧区带划分,并对燃烧各区带储层进行压汞、族组分、热解以及岩矿转化分析,形成了系统的燃烧区带储层变化分析方法,认识了火驱区带内原油和岩矿转化规律,得到了基于热物性和热化学性质变化的燃烧区带划分结果。实验表明:在燃烧界面以下的结焦区并非完全结焦,处于油与焦炭共存状态,焦炭沉积有效减小了该区储层孔隙度和渗透率,稳定了燃烧前缘,阻挡了气窜;燃烧界面以上的已燃区在高温煅烧下高岭石向蒙脱石和伊利石转化,产生大量微裂缝,有利于空气快速导流。
During the process of in-situ combustion( ISC),the changed characteristics of the fluid and reservoir under high temperature have the crucial influences on the field operation. Based on the dividing theory of the ISC zone,the zones were divided for the reservoir in the coring well with the help of the integrated method between the field coring and indoor experiment,and moreover the analyses on the mercury injection,group/SARA components,pyrolysis,rock and mineral transformation were engaged for the reservoirs in each ISC zones,and then the analyzing method of the systematical reservoir changes was developed,thus the transferring laws was obtained between the crude oil and the rock-mineral in the fire flooded zones,finally the divided results of the ISC zones were achieved on the bases of the changes in the thermophysics and thermochemistry. The experiment shows that the coked zone beneath the ISC interface is not completely coked and in the coexistence state between the oil and the coke,the coke sedimentation can effectively reduce the reservoir porosity and permeability in the zone,thus the combustion front is stabilized and the gas channeling is blocked; the fired zone on the interface,the kaolinite has transformed to montmorillonite and illite under the high-temperature combustion,and then a large number of the microfractures are developed,thus the air is easy to rapid conduction and diversion.

关键词(KeyWords)： 火驱;燃烧阶段;区带特征;岩矿组成
fire-flood/in-situ-combustion(ISC);combustion stage;zone/belt characteristic;rock and mineral compositions

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项“稠油火驱提高采收率技术研究与应用”(2016ZX05012-003)

作者(Author): 杨智,廖静,高成国,冯利娟,杨凤祥,袁士宝
YANG Zhi,LIAO Jing,GAO Chengguo,FENG Lijuan,YANG Fengxiang,YUAN Shibao

DOI: 10.19597/J.ISSN.1000-3754.201805044

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