Optimising 188bet vietnam under-reamer string design for 188bet vietnam well at Hai Thach field, Nam Con Son basin
Summary
According to 188bet vietnam drilling program approved for Hai Thach field, 188bet vietnam drilling section below 188bet vietnam 16” casing liner (14.85” internal diameter) will be carried out by two separate BHAs: first drilling 188bet vietnam 12.25” section by PDC bit to 188bet vietnam section target, then under-reaming 188bet vietnam wellbore to 14.5” and 16.5” diameter in order to run 13.625” casing string. Using two separate BHAs for reaming 188bet vietnam wellbore certainly leads to a time increase in 188bet vietnam run in hole (RIH) and pull out of 188bet vietnam hole (POOH) of 188bet vietnam drill-string and hence 188bet vietnam associated costs such as rig and other related third party services. Therefore, it is necessary to study and calculate 188bet vietnam optimal drill-string design to ensure 188bet vietnam wellbore under-reaming as well as to minimise 188bet vietnam drill-string running time, thereby improving 188bet vietnam Drillex and Capex. 188bet vietnam application of 188bet vietnam optimised reamer string design in 188bet vietnam wells of Hai Thach field has brought a feasible concept that can be applied for other wells having similar profiles and geological stratigraphy in Vietnam in 188bet vietnam future.
Key words: Under-reamer string optimisation, wellbore reaming, drill-string simulation, reamer string design, Hai Thach field.
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