Plannign an effective aerated drilling operation n hard formaiton based on cost analysis

摘要

The use of air/mist/foam drillign has bene increasing over the years bringing advantages not found in conventional drilling.The comparison betwen the performance of conventional and two-jphase flow drilling has shown the second techiuqe presents several advantages to the last one: (1) minimum or no damage to sensitive pay zoens, (2) minimum or no damage to sensitive pay zoens, (2) immediate and continuous evlauation of cutings for hydrocarbon shows, (3) adoidance of lost circulation,and (4) higher penetration rates in hard formations.