致密砂岩气层测井评价新方法研究  

A New Method of Logging Interpretation for Tight Sandstone Gas Zones

作　　者：张志虎[1] 孙玉红[1] 金力钻 李松林[1] 黄晓[1] 

机构地区：[1]中海油能源发展股份有限公司,天津300452

出　　处：《特种油气藏》2015年第5期46-49,153,共4页Special Oil & Gas Reservoirs

基　　金：中海油能源发展工程技术公司非常规技术研究院生产项目"临兴区块先导性试验方案"(ZKFFWLXKF-14-013)

摘　　要：针对临兴区块致密砂岩气层的地质特征及测井资料特点,提出利用密度测井响应方程和中子测井响应方程建立ρt—ФN模型,利用该模型可在岩电参数、地层水电阻率不确定的情况下定量求取储层含气饱和度。通过多口井的实际资料处理和试气结果验证,与常规解释方法相比,ρt—ФN模型计算的含气饱和度在气层与非气层上差异更明显,在辨别储层流体性质上,具有更高的分辨率。结果表明,建立的含气饱和度模型可用于研究区致密砂岩气层的定量评价。Considering the geologic characteristics and logging curve features of tight sandstone gas reservoir in Linxing block,ρt—ФN model is established by using density logging response equation and neutron logging response equation. According to this model,reservoir gas saturation could be obtained quantitatively with unknown litho- electric parameters or formation water resistivity. Real data processing and gas production tests for many wells proved that,comparing with conventional interpretation methods,the gas saturation derived from ρt—ФN model has more obvious diffidence between gas zones and non- gas zones; in addition,this model could get more accurate results for identifying reservoir fluid properties. The results showed that,this gas saturation model could be applied to evaluate tight sandstone gas zones in the region of interest.

关 键 词：致密砂岩 密度测井 中子测井 ρt—ФN模型 临兴区块 

分 类 号：TE122.2[石油与天然气工程—油气勘探]