摘要
塔中Ⅰ号气田奥陶系台缘礁滩体储层缝洞系统在空间上由孔、洞、缝叠合复合而成。针对礁滩体储层缝洞系统的复杂性,本文提出动静态结合分析储层缝洞连通性的研究思路和方法:①同一缝洞单元内,沉积相、储层发育层位及深度具有相似性;②地层压力分析是最简易直接的研究方法,属连通性研究的充要条件;③同一缝洞单元的流体性质差异较小,若流体性质差异大,则一定不连通,反向递推则不成立;④井间干扰试井可准确地分析动态连通性和推算单井连通程度;⑤生产测试资料可用于辅助连通单元的划分和验证。通过静态和动态资料研究,塔中Ⅰ号气田共划分了53个缝洞连通单元,其中连通的缝洞系统有3个,沿台缘呈带状分布。
The fractured-vuggy system of Ordovician platform margin reef beach reservoirs in Tazhong I gas field is composed of hole, hole and fracture in space. In view of the complexity of the fractured-vuggy system of reef beach reservoirs, this paper puts forward the research ideas and methods of dynamic and static analysis of the fractured-vuggy connectivity of reservoir. ①Sedimentary facies, reservoir development horizons and depths are similar in the same fractured-vuggy unit. ②Formation pressure analysis is the most simple and straightforward methodology, which is the necessary and sufficient condition of connectivity study. ③The difference of fluid properties of the same fracture cavity element is small. If the difference of fluid properties is large, it cannot be connected, and the reverse recursion does not work. ④Inter-well interference test can accurately analyze the dynamic connectivity, which is the necessary and sufficient condition of connectivity study. ⑤Production dynamic data can be used to assist connectivity unit division. Through the study of static and dynamic data, the TazhongⅠ gas field is divided into 53 connected units, of which there are 3 connected fractured-vuggy systems distributed along the platform margin.
作者
范鹏
郑霄
杨文博
FAN Peng;ZHENG Xiao;YANG Wenbo(Shaanxi Geological Survey and Planning Research Center(Shaanxi Geological Survey Fund Center),Xi'an,Shaanxi 710068,China;Shaanxi Institute of Geological Survey,Xi'an,Shaanxi 710054,China;Xi'an Big Data Assets Management CoMPany,Xi'an,Shaanxi 710075,China)
出处
《石油地质与工程》
CAS
2020年第5期12-18,共7页
Petroleum Geology and Engineering
关键词
塔中Ⅰ号气田
礁滩体储层
缝洞系统
动静态结合
连通单元
TazhongⅠgas field
reef and shoal complex reservoir
fractured-vuggy system
dynamic and static combination
connectivity unit
