Sanding rules and proper sanding control time of Sudan P Oilfield

Formation Y-S is the major oil-bearing formation of Sudan P oilfield,with its buried depth being1300 meters.The formation features in poor consolidation,bad diagenesis,high porosity and permeability.The sanding-prone problem of the formation has negative impact on the proper production of oil wells and lowers the economic results in developing overseas oilfields.To solve the conflict between high single-well production and sanding problem,the author employs multiple sanding prediction methods to predict the major pay zones of the oilfield,such as interval transit time method,porosity method,assembling die mensuration,Schlumberger method,sand production coefficient method,wellbore solidity method,and mechanics stability method,establishes a proper sanding identification model,points out the sensitive sanding areas,and summarizes sanding rules.The author also mentions that the wells near faults(especially major faults) and on the top of structures should be paid more attention.What’s more,dynamic production parameters such as changes in watercut,production pressure difference,and formation pressure are used to predict proper sand control time,which helps predict and guide actual production.