电缆地层测试技术的发展及其在地层和油藏评价中的角色演变  

The Evolutive Roles of WFT in Formation and Reservoir Evaluations

作　　者：孙华峰[1,2] 陶果[1,2] 周艳敏[1,2] 陈宝 杜瑞芳 

机构地区：[1]中国石油大学油气资源与探测国家重点实验室,北京102249 [2]中国石油大学北京市地球探测与信息技术重点实验室,北京102249 [3]中国石油集团测井有限公司技术中心,陕西西安710021

出　　处：《测井技术》2010年第4期314-322,共9页Well Logging Technology

基　　金：国家科技重大专项大型油气田及煤层气开发专题4模块式动态地层测试系统(编号:2008ZX05000-020-04);国家863计划项目(编号:2006AA06Z207)资助

摘　　要：分析了电缆地层测试技术的现状和发展,探讨其在国内外的应用前景和我国电缆地层测试技术的发展目标。电缆地层测试器(WFT)可以完成地层流体取样、储层压力以及地层压力梯度测试、确定储层油水界面以及进行储层渗透率解释和产能评价,能够将测井评价提升到油藏评价。井底流体分析仪器(DAF)可以实时测量井下流体详细的组分、pH值、温度压力和密度黏度等;人工神经网络(ANN)、NMR测井和实验室PVT测量同井底流体分析(DAF)技术结合可以得到更准确更详细的地下流体的信息;双封隔器的改进可以使得2个流体进入口同时监测流体污染情况,以便快速取得较纯净地层流体;管线过滤器可以有效阻止细小颗粒进入仪器管线,避免了探针阻塞和仪器毁坏;探针形状的改进增加了测试区域,提高了测试的成功率。新的测试方法及其应用可以在一些当前认为比较复杂的储层如碳酸盐储层、裂缝性储层和薄互层等进行测试。新的方法和技术节省了时间和成本,其测量精度也明显提高。Analysed are current state and developing trend of Wireline Formation Tester （WFT） both at home and abroad; Studied is the future developing targets about WFT in China. The WFT can complete the following tasks： （1）formation fluid sampling; （2）reservoir pressure and for- mation pressure gradient tests; （3）oil/water contact determination; （4）reservoir permeability estimation; and（5）improved reservoir evaluation. DFA may in real-time measure downhole fluids compositions, pH value, temperature, pressure, fluids density and viscosity, etc. A combined measurement of ANN technique, NMR log, PVT and DFA can get more accurate and detailed downhole fluids information. An improved dual port straddle packer has an upper and lower fluid inter, through which we can survey real-time fluid pollution and obtain more cleaner fluids quickly. The pipe filter may effectively stop the thin grains entrance into the pipeline so that the probe could not be blockaded and the tool not be destroyed. The improved probe geometry enlarged the testing area and enhanced the testing efficiency. The above new methods have been successfully used in some challenging reservoirs such as carbonate reservoirs, factured reservoirs and thin interbeds, etc. Therefore, many difficult problems in oil/gas explorations and developments have been gradually solved. The new methods have saved much time and cost, and their measuring ac- curacy is also much better.

关 键 词：测井技术 电缆地层测试 油藏评价 方法 应用 进展 

分 类 号：P631.83[天文地球—地质矿产勘探]