摘要
相对直井而言,水平井最本质的不同在于:介质并不以井眼为对称轴呈径向对称。因此,在水平井测井解释中,各向异性、薄层、倾斜层等情况变得更为复杂。LWD(随钻测井)是在地层刚被钻开、泥浆侵入刚开始时进行的,所得数据具有即时和真实两大特性,所以将其用于水平井测井评价有着得天独厚的优势,可以有效地判别地层、识别油气层(特别是天然气储层)。从识别层界面、储层评价、识别流体界面等方面介绍了利用LWD资料进行水平井测井评价的常用方法。并以四川油气区实钻的一口碳酸盐岩水平井为例,评价了LWD资料在该井的应用效果,进而提出LWD资料用于水平井测井评价中尚有待解决的问题。
The intrinsic difference between horizontal well and vertical well is that media don′t show radial symmetry around the wellbore.Therefore,such situations as aeolotropism,thin bed and inclined layer will become more difficulty in log interpretation of horizontal well.Stratum data acquired from LWD(logging-while-drilling),because of the two characteristics of immediacy and authenticity,have favorabe dominance in log evaluation of horizontal well,and can be used to effectively distinguish stratum,oil and gas reservoir(gas reservoir especially).The text describes some often-used methods in layer interfaces recognition,reservoir evaluation and fluid contact recongnition,which can be used in log evaluation of horizontal well.In addition,taking a carbonate horizontal well drilling in Sichuan oil province as example,application of LWD data in this well is evaluated,to take a step further,some problems how LWD data will be better used in log evaluation of horizontal well are proposed.
出处
《西南石油大学学报(自然科学版)》
CAS
CSCD
北大核心
2008年第4期24-26,共3页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家863专项研究课题"特殊储层测井识别与地层参数定量评估技术"(2006AA06Z220)
关键词
水平井
随钻测井
储层评价
层界面
气水界面
horizontal well
logging-while-drilling
reservoir evaluation
layer interfaces
gas-water interface