黑帝庙地区低阻油层测井解释方法及应用

Well Logging Interpretation Method and Application in Low-resistivity Reservoir in Heidimiao Areas

低电阻率油层在松辽盆地南部黑帝庙地区比较发育,因而给测井解释评价工作带来了一定困难。该研究利用测井、岩心分析资料对该区低阻油层的成因机理进行了分析,由于姚一段地层孔隙度相对较高、砂岩颗粒较细引起束缚水含量增加、油藏幅度低等诸多因素影响使得岩石中含水较高,从而形成低电阻率油层。在分析低阻油层成因的基础上,模拟地层温度、压力开展一系列岩电试验,获得了精确的岩电参数,形成一套适合该区的低阻油层解释方法。处理解释求取的储层含油饱和度、含水率等参数,对测井解释是一个非常重要的参考依据。这些储集参数在黑帝庙地区具有较好的适用性,对其他地区也具有一定的借鉴意义。

Heidimiao reservoir was located in the southern Songliao Basin, where huge area of low resistivity reservoirs was developed, so it induced some difficulties in well logging interpreting evaluation. Low resistivity oil layer genetic mechanism was analyzed by using logging data and core analysis data. The formation of Yao-1 Member has relatively high porosity, fine grain size caused bound water content increase, low amplitude reservoir and many other factors caused high water-bearing in rocks, thus forming the low resistivity reservoirs. By fitting formation temperature and pressure, a series of core electricity experiments were made on the basis of analyzing low resistivity oil layer’s genetic mechanism to obtain accurate parameter values a,b,m,n, then forming a set of interpretation methods for the low resistivity reservoirs of this region. Oil saturation, moisture content and many other parameters are calculated by processing and interpretation, they are important reference for logging interpretation. These reservoir parameters have good applicability in Heidimiao Area, but it is also the reference of the other regions.