富县北区块储层流体性质判识方法探讨

鄂尔多斯盆地延长组是富县北探区最主要的产油层段。储层以长石砂岩和岩屑质长石砂岩为主,成岩作用较强,物性较差,使得常规测井解释储层流体性质判识难度大。此文采用孔隙度-含水饱和度交会图法和深、浅双侧向直观判别油气层法对区内储层的流体性质进行判识,并与实际试油结果对比,吻合度达80%,取得了较好的实际应用效果。

Discussion about the Methods for Identification of Fluid Properties in the Fuxian North Block

Yanchang formation is the main oil producing layer in the Fuxian North Block in Ordos basin.The reservoirs consist of mainly feldspar sandstone and lithic feldspar sandstone,experienced with strong diagenesis,resulting in poor physical property.Therefore,it is very difficult to identify the reservoir fluid property with the conventional logging interpretation method.In this paper,the porosity-water saturation crossplot method and the DLL visual discrimination have been used to identify the reservoir fluid property,and the identification results have been compared with the actual testing results,having 80%agreement with the actual testing results.Good application results have been achieved by using these methods for identification of reservoir fluid property.