This discussion describe sedimentive mechanics and preventive methods or decrease heavy organic sediments specially asphalt and evaluate effective factors in this process for reservoir and wellbore real situation. Which is effective for resolving sedimentation problems are wellbore, bore facilities and processing establishments Sedimentary problems in addition to more cost for remove sediments lead to long and several stops in production wend .So we should investigated more about this issue. Asphalten, vax & resin of thermodynamic heavy compound view. Asphalten is piecing of one oil or carbon other resources. it is in soluble in paraffin solution with low boil point like heptane and is soluble in benzene. Asphalting are different with each other to different solutions make different oil resources and we cannot have general definitions of composite structure view.