摘要
四川盆地广安地区上三叠统须家河组属于典型的低孔低渗储层,复杂的微孔隙系统导致其具有很高的束缚水饱和度,加上较高的地层水矿化度,使得渗透层段的电阻率值相对较低,甚至小于相邻泥岩层段电阻率。为较好地判别广安地区低阻储层的流体性质,部分重点井同时测有双侧向和阵列感应两组电阻率曲线。对于相同的介质而言,感应测井仪的响应值应该与侧向测井测到的电阻率值相同,但广安地区须家河组实际测井资料却表明电测曲线在该地区部分井的低阻储层段表现为深感应与深侧向值存在一定的差异。为此从双侧向测井和阵列感应测井的测量原理出发,分析了造成这种差异的原因,认为低阻储层深侧向与深感应测井值存在差异主要是两种测井方法的测量原理不同和适用条件不同所造成的。
The Xujiahe formation of Guang'an area belongs to a typical low porosity and low permeability reservoir formation. Because of the micropore system,it has high irreducible water saturation and higher salinity of formation water,which leads to the relatively lower resistivity in the permeable layer. Some important wells measured two resistivity curves by the dual lateral logging and the array induction logging for a better discrimination of the properties of fluids. Theoretically,the deep induction logging measurements must be equal to the deep lateral logging measurements in the same formation. But the field electric log data show that there are certain differences between the deep induction logging and the deep lateral logging in these local low resistivity reservoirs. Based on the measuring principles of dual lateral logging and the array induction logging,this paper holds that the differences between the deep induction and the deep lateral value are attributed to the applicable measuring conditions and the measuring principles of the two logging methods.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2009年第1期48-50,共3页
Natural Gas Industry
基金
国家高技术研究发展计划(863计划)"特殊储层测井识别与地层参数定量评估技术"(编号:2006AA06Z220)
西南石油大学研究生创新基金(编号:CXJJ27049)的资助
关键词
广安地区
晚三叠世
低渗透储集层
感应测井
侧向测井
Guang'an area,Late Triassic,low permeability reservoir,induction logging,lateral logging
