塔里木盆地塔河4区缝洞型油藏井间连通程度

doi:10.11743/ogg20120319

摘要/Abstract

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。

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

Abstract:

The types of reservoir spaces of the Ordovician carbonate reservoir of theblock-4 of Tahe oilfield in Tarim Basin are dominated by cavern solution pore and vug,and fracture systems formed by karstification and tectonic movement.The caverns are discrete and the main reservoir spaces,while the fractures are the major migration 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.

Key words: connectivity, communication model, dynamic disturbance, reservoir space, fractured-vuggy reservoir, carbonate reservoir, Tahe oilfield

中图分类号:

TE33

杨坚,程倩,李江龙,等. 塔里木盆地塔河4区缝洞型油藏井间连通程度[J]. 石油与天然气地质, 2012, 33(3): 484-489,496. doi: 10.11743/ogg20120319 Yang Jian,Cheng Qian,Li Jianglong,et al. Interwell-connectivity analysis for fracture-vug reservoirs in the block-4 of Tahe oilfield,Tarim Basin[J]. Oil & Gas Geology, 2012, 33(3): 484-489,496. doi: 10.11743/ogg20120319

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