塔里木盆地塔河4区缝洞型油藏井间连通程度  

Interwell-connectivity analysis for fracture-vug reservoirs in the block-4 of Tahe oilfield,Tarim Basin

作　　者：杨坚[1] 程倩[2] 李江龙[2] 刘中春[2] 

机构地区：[1]中国地质大学,北京100083 [2]中国石化石油勘探开发研究院,北京100083

出　　处：《石油与天然气地质》2012年第3期484-489,496,共7页Oil & Gas Geology

基　　金：国家基础研究发展计划("973"计划)项目(2011CB201006)

摘　　要：塔里木盆地塔河油田4区奥陶系碳酸盐岩储层以岩溶和构造运动形成的溶洞、溶蚀孔洞和裂缝系统为主。溶洞呈离散状分布,是主要的储集空间;裂缝是主要的流动通道。塔河4区奥陶系碳酸盐岩储层具有埋藏深、非均质性强和开发难度大等特点。例举塔河4区S48单元7口井的生产动态干扰特征,由静态资料分析油藏的4种储集空间类型,包括溶洞型、裂缝型、缝洞组合型和致密岩块型。据此,提出井间洞连通、裂缝连通、复合连通和不连通4种井间连通模式。最后,由类干扰试井理论结合示踪剂扩散理论分析井间综合流量系数,初步定量表征井间连通程度。由此倡导,缝-洞型油藏剩余油分析方法与挖潜措施需要结合井间连通模式和连通程度。The types of reservoir spaces of the Ordovician carbonate reservoir of theblock-4 of Tahe oilfield in Ta- rim Basin are dominated by cavern solution pore and vug, and fracture systems formed by karstification and tec- tonic movement. The caverns are discrete and the main reservoir spaces, while the fractures are the major migra- tion pathways. The typical characteristics of the carbonate reservoir in the study area are of large burial depth, strong heterogeneity and large difficulty in petroleum production and so on. This paper analyzes the interference features of production performance of 7 wells in S48 unit of block-4 in Tahe oilfield. Four types of reservoir spaces are recognized based on analysis of static datum, including cavern-, fracture-, fracture-vug- and tight- types. Based on the analysis, four types of inter-well communication model are proposed, including inter-well ca- vern communication, inter-well fracture communication inter-well fracture and vug communication and inter-well non-communication. Finally, the interference well test theory and tracer diffusion theory are used to analyze the flow coefficient and quantify inter-well connectivity. It is pointed out that inter-well communication models and connectivity should be integrated into the prediction and production of residual oil in fractured-vuggy carbonate reservoir.

关 键 词：连通程度 连通模式 动态干扰 储集空间类型 缝-洞型油藏 碳酸盐岩储层 塔河油田 

分 类 号：TE33[石油与天然气工程—油气田开发工程]