基于微观孔隙结构的火山岩储层分类方法研究  

Study on Volcanic Rock Reservoir Classification Method Based on Microscopic Pore Structures

作　　者：覃豪[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《石油天然气学报》2011年第1期98-102,168,共5页Journal of Oil and Gas Technology

基　　金：国家"973"规划项目(2009CB219300)

摘　　要：划分有效储层对气藏开发、储量计算及开发方案编制等具有十分重要的意义。研究区火山岩储层孔隙类型多,孔隙结构复杂,储层非均质性严重,在不考虑微观信息情况下,应用常规参数无法准确划分有效储层。通过对大量的压汞资料进行分析研究,应用能反映储层微观孔隙结构的毛管压力曲线、平均孔隙半径和孔喉半径比来对储层进行分类。在岩性识别、流体识别和储层参数解释的基础上,先建立平均孔隙半径和孔喉比的计算模型,然后结合压汞、常规测井、核磁共振测井和测试资料,采用毛管压力曲线形态定性分类与平均孔隙半径等参数定量分类相结合,将储层分为Ⅰ、Ⅱ、Ⅲ类,建立了酸性火山岩气藏储层测井分类标准。应用该方法在研究区处理解释40口井,解释结论与试气结论符合较好,且与研究区地质认识一致。Dividing the effective reservoirs was very important for the gas reservoir development,reserves calculation and preparing development program.There were many porosity types complex structures and serious reservoir heterogeneity of volcanic rock reservoirs.The effective reservoirs could not be identified accurately only by using conventional parameters without considering the microscopic information.Through analyzing and studying massive pressure mercury data,the capillary pressure curve,the average pore width and the pore throat ratio which could reflect the microscopic reservoir pore structure are used to classify the effective reservoirs.On the basis of lithological recognition,fluid recognition and reservoir parameter explanation,the computation model on the average pore width and the pore throat ratio was established first.Then in combination with capillary pressure curve,conventional well logging,NMR logging and well test data,the qualitative classification of capillary pressure curve shape was combined with the quantitative analysis of average pore radius the reservoir was divided into Type Ⅰ,Ⅱ and Ⅲ.The well logging classification standard of the acidic volcanic rock gas reservoirs is established.It is used for explaining 40 wells in the studied area,and the result is consistent with the well testing data and the research area geology understanding.

关 键 词：核磁测井 毛管压力曲线 平均孔隙半径 孔喉比 孔隙结构 储层分类 

分 类 号：TE155[石油与天然气工程—油气勘探]