塔河油田储层裂缝测井识别和有效性评价

综合利用岩心、常规测井、电成像测井和偶极横波成像测井资料研究裂缝有效性。针对塔河油田奥陶系裂缝性储层,结合不同探测深度的微电阻率成像FMI和方位电阻率成像ARI测井资料研究裂缝的径向延伸深度,分析储层裂缝的有效性;利用微电阻率成像FMI和偶极横波测井DSI提供的斯通利波信息分析裂缝的渗滤性,在裂缝发育段计算裂缝参数,定量评价储层裂缝的有效性。经油田现场测试,4种方法结合可以较为准确地评价储层裂缝的有效性。

Log Identification and Effectiveness Evaluation on Reservoir Fractures in Tahe Oilfield

Fractured reservoir is one of the most general reservoirs in Tarim.Fractures have strong heterogeneity.How to use the logging information to identify fractures is always a problem in evaluation of the fracture effectiveness.In this paper,we study the fracture effectiveness with the data of core,well logging,FMI and DSI.As for fractured reservoirs in the Ordovician formation,Tarim basin,a combination of FMI data and ARI data with different investigation depths may be used to study radial extended depths of the fractures,and analyse the fracture effectiveness in the reservoirs.The Stoneley wave information provided by FMI and DSI data may be used to analyse percolation property of the fractures,and based on determination of the developed fractures,the fracture parameters such as fracture openings and fracture porosities are calculated so as to quantitatively evaluate the fracture effectiveness.Practical in-situ log applications prove the above methods are very accurate in evaluating the fracture effectiveness.