摘要
鄂尔多斯盆地中部气田主产层孔缝洞发育、储层非均质性很强,生产过程中储层的性质、连通性、渗流边界及改造效果等动态响应特征是关于气田开发效果的关键指标。为此,综合储层性质、气藏类型、渗流边界特征、气井酸化压裂效果和邻井干扰等因素,对64井次的修正等时试井和压力恢复试井资料进行了系统的分析解释。结果表明:①中部气田储层为单一介质储层(93.7%),双孔介质不发育;②气藏为复合型气藏(59.4%),均质模型较少;③渗流边界主要有开口或平行边界两种,与沟槽一致性好;④气井酸化压裂效比较理想,89.1%的井无污染;⑤邻井干扰少(7.8%),有一定加密潜力。
The net pay zones of gas reservoirs in the middle Ordos Basin are characterized by abundant pore-fracture-cavity and high heterogeneity.The reservoir dynamic response characteristics including reservoir property,connectivity,seepage boundary and post-stimulation are the highlight issues in gas field development.Thus,64 times of modified isochronal well testing and pressure build-up test were developed and comprehensive analysis were also carried out from aspects of reservoir characters,reservoir types,characters of seepage boundary,post response of fracturing and acidizing,and interferences among the adjacent wells.Result indicates five important conclusions.(1)The reservoir is single medium(93.7% of the total)and of undeveloped dual porosity.(2)The reservoir is of composite system(59.4% of the total)and of few symmetrical model.(3)There are two types of reservoirs seepage boundaries either ringent or parallel,which are in accord with the groove.(4)There is good acidizing and fracturing response with 89.1% of the total wells uncontaminated.(5)Interferences among the adjacent wells are less investigated(7.8% of the total),which shows that infill development is feasible.It can be concluded that the study presented in this paper is of practical use and can supervise gas reservoir development directly.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2009年第11期86-89,共4页
Natural Gas Industry
基金
中国石油天然气集团公司石油科技中青年创新基金(编号:06E1040)的资助
关键词
鄂尔多斯盆地
碳酸盐岩
储集层
非均质性
缝洞
试井
压力
Ordos Basin,carbonate rock,reservoir,heterogeneity,isochronal well testing,well test analysis
