Fluid Identification Method Of Urho Formation In Mahu Sag

The evaluation of reservoirs in Mahu Sag is in trouble.The trouble is the ineffective interpretation of conventional well logs.The reason is the low porosity and low permeability property of Urho formation.This research establishes an effective evaluation model for Urho formation.Firstly,the clay volume of the block affects the physical property parameters of the reservoir.The interpretation model of the clay volume in the well xx4 area is established with the NMR logging data.Based on the model,the interpretation model of the physical parameters is established and solved the problem that calculating physical property parameters was inaccurate;After analyzing the NMR logging data of the block,a corresponding fluid identification plate is established,and it is verified that this plate suits the block;With the core analysis data,the oil production testing data,the mud logging data and the NMR logging data,a saturation model suitable for the block is established.These models solved the fluid evaluation problem of the study area,which lays a solid foundation for the future exploration.