电缆地层测试在低渗储层应用方法的研究  

Feasibility study on application of wireline formation testing to low permeability reservoirs

作　　者：邸德家[1,2] 陶果[1,2] 叶青[1,2] 

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)CNPC测井重点实验室,北京102249

出　　处：《地球物理学进展》2012年第6期2518-2525,共8页Progress in Geophysics

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(2011ZX 05000-020-04)资助

摘　　要：电缆地层测试技术在油气田勘探开发中得到了越来越多的应用,然而在低渗储层中的应用遇到了很大的挑战。本文通过数值模拟和现场资料分析了电缆地层测试在不同渗透性储层中的压力响应和抽吸流体的时间,指出在低渗储层中压降幅度大,压力恢复和抽吸地层流体的时间变长,容易造成预测试失败和仪器卡在井下的危险,阐明了在低渗储层中仪器的管储效应明显,地层容易出现超压现象。针对电缆地层测试在低渗透储层遇到的各种问题,本文在数据处理方面分析了FRA算法(Formation Rate Analysis)原理,探讨了其在低渗储层的适用性。在仪器选择上分析了大面积坐封胶垫探针(LAPA)和双封隔器模块在低渗储层的应用效果,同时指出精密数字泵抽技术是其成功应用于低渗储层的关键。Wireline formation tester（WFT） has been increasingly applied in oilfield exploration and production.However,the application of WFT in low permeability reservoirs is still a challenge.Through numerical simulations and filed data,this paper analysed the pressure response and fluid sampling time of WFT for the reservoirs of variety of permeabilities and demonstrated that there could be a big amplitude of drawdown pressure and long buildup time for a low permeability formation and consequently cause a null pretest or even tool failure in downhole.In addition,this paper also illustrated that the flowline storage effects would be evident and the Supercharge happened easily in low permeability reservoirs.To solve these problems,this paper introduced the Formation Rate Analysis in data processing and analyzed the applicability of Large Area Packer（LAPA） and Dual Paker modal of Schlumberger MDT in low permeability reservoir.Finally,the precise digital pumping is considered to be the critical technology in applications of WFT to low permeability reservoir.

关 键 词：电缆地层测试 低渗透储层 FRA 地层超压 管储效应 

分 类 号：P631[天文地球—地质矿产勘探]