WC54井区CO_2单井吞吐强化采油室内实验及数值模拟研究  

STUDY ON IN-HOUSE EXPERIMENTS AND NUMERICAL SIMULATION OF EOR BY CO_2 HUFF AND PUFF WITH SINGLE WELL IN WELL WC54 AREA

作　　者：庞进[1] 孙雷[1] 孙良田[1] 吴应川[2] 陈德斌[2] 

机构地区：[1]"油气藏地质及开发工程"国家重点实验室.西南石油大学 [2]中石化中原油田分公司

出　　处：《天然气勘探与开发》2006年第2期44-48,共5页Natural Gas Exploration and Development

基　　金："油气藏地质及开发工程"国家重点实验室基金项目(PLN018)资助成果

摘　　要：鉴于WC54井区油藏单元目前处于低产、无法形成注采井组补充能量的开采状态,开展单井注CO2吞吐强化采油工艺措施,这是最为可行的增产提高采收率方法之一。为此,文章针对WC54井区油藏的地质开发特征,在对油井目前地层流体进行相态分析基础上,通过CO2—油藏流体膨胀实验,确定CO2吞吐的驱替机理,再通过CO2吞吐长岩心驱替实验,确定CO2吞吐增产原油的程度和时效性,并与WC211井的试验结果进行了比较,分析了原油物性和注气时期对试验结果的影响。然后利用数值模拟对CO2吞吐强化采油过程中的工艺操作参数,进行了敏感性分析,为WC54井区油藏实施CO2吞吐强化采油可行性方案设计,提供了系统的室内综合评价结果。According to the low production and the exploiting status of no injection and production well group to compensate energy now,it is one of the most feasible ways to improve the recovery factor to take the measure of EOR by CO_2 huff and puff with single well.Aiming at the geological and development characteristics of the reservoir in Well WC54 area,based on the phase state analysis of the formation fluids,by the swelling experiment of CO_2 and reservoir fluids to determine the drive mechanism of CO_2 huff and puff,by the drive experiment with long cores of CO_2 huff and puff to determine the level and the actual effect of production increase by CO_2 huff and puff,and comparing with the testing results of Well WC54,the influence of the oil physical property and the gas injection time on the testing results is analyzed.Then,with numerical simulation,the sensitivity analysis of the operation parameters is conducted during the EOR process by CO_2 huff and puff,which provides systematical and comprehensive in-house evaluation results for the design of feasibility program to perform EOR by CO_2 huff and puff in Well WC54 area.

关 键 词：CO2 单井 强化开采 提高采收率 实验室数据 

分 类 号：TE319[石油与天然气工程—油气田开发工程]