摘要
碳酸盐岩油藏中钻遇溶洞型储层的油井是主要的产能贡献井,识别该类储层对开发碳酸盐岩油藏具有重要意义。首先分析了油井钻遇溶洞发育型储层的静态资料特征以及生产动态特征,通过对塔北地区大量钻遇洞穴油井试井曲线的研究,将溶洞型碳酸盐岩储层分为两大类:一是自身供液充足的大溶洞拟均质类,该类储层的试井曲线早期续流段长,径向流段未出现或是受边界影响晚期径向流段被掩盖;二是外区渗透性变差的溶洞复合油藏类,该类储层的试井曲线早期续流段长,晚期压力导数上翘,压力与压力导数曲线呈"三角形"。在此基础上建立了储层特征-生产动态特征-试井曲线特征对应关系,对利用试井曲线判断储层类型及类似油藏开发具有指导意义。
Oil wells in carbonate reservoirs with vugs are the main flow potential contribution wells,so it is signifigantly to recognize these kinds of reservoirs on developing carbonate reservoirs.Firstly,the static state document features and producing dynamic features of the vuggy reservoirs are analysed.By doing a lot of research of well test curves on the oil wells in north Tarim area,vuggy carbonate reservoirs can be devided into two kinds.The first ones are pseudo homogeneous big vuggy reservoirs which can supply themselves enough liquid.The well test curves of this reservoir have following two characterics.Its early fillup period is long and radial period does not appear or be hided because of the influenced by late radical periods.And the second ones are vuggy compound reservoirs whose outside permeability get worse.The early fillup period of this kind reservoirs＇ curves is long and the later part curves of the pressure derivative upwarp.The curves of the pressure and pressure derivative form a triangle.Based on this,the relationship among reservoir features,producing dynamic features and well tests curves＇ features are eatablished.And this has guiding signifigance on judging reservoir types or similar reservoirs by using well test curves.
出处
《科学技术与工程》
北大核心
2014年第6期121-126,共6页
Science Technology and Engineering
