已发表: 06/09/2017
已发表: 06/09/2017
![The StingBlade bit drilled a cumulative 819 m [2,687 ft] with an average ROP of 2.3 m/h [8 ft/h] in the first run and 1.6 m/h [5.2 ft/h] in the second run. This was a 40% increase in average ROP. The bit increased the average length drilled per bit by 8 times, which resulted in a savings of 15.7 rig days and a more than 50% reduction in cost per meter as compared with drilling the offset well.](/-/media/files/smith/tech-report/stingblade-offshore-india-tr-a.ashx)
Gujarat-Saurashtra Basin
Offshore India
Block
Kutch Saurashtra
Field
Mumbai High
Formation
Volcanic dike
Oil and Natural Gas Corporation Limited (ONGC) in India needed to drill a minimum of 300 m [980 ft] through a volcanic dike formation. In an offset well, the operator encountered high variation in unconfined compressive strength (UCS) throughout the section—in some places as high as 33,000 psi [228 MPa].
While drilling the offset well, nine bits were used to penetrate through 550 m [1,804 ft] of Mesozoic formation with an average ROP of 0.5 m/h [1.6 ft/h]. This resulted in high drilling costs. Moving forward, ONGC needed to cut costs in order to drill the deepest offshore HT well in the India and Bangladesh region.
