... with the same equipment. Three of the four targeted formations were in the 8 ½″ hole section, UBD was selected to drill the first reservoir formation which allowed pore pressure verification and avoided using excessive mud weight that was the culprit of many challenges like slow ROP, drilling fluid losses, bit...

... mud weights in each section, execution for successful delivery of the wells was further aided by identification of the optimal mud systems, critical casing setting depths and real time drilling optimization, ensuring good borehole quality throughout for further logging and testing programmes...

... and formulation annular pressure drilling depletion well control fluid loss control upstream oil & gas lot data mud weight drilling fluid chemistry drilling fluids and materials casing and cementing fracture closure pressure well planning wellbore strengthening wellbore reservoir acid wash fg...

... During stuck pipe incidents, there are occasions where the stuck pipe mechanism can be misinterpreted with other types of events like hole collapsing and packing. In other stuck pipe mechanisms, like wellbore collapsing, the higher mud weight could prevent wellbore problems and pipe becoming...

... test results provided UCS calibration for better wellbore stability analysis (WBS) and stable mud weight window prediction in new wells. In the first field targeting Kalol formation, presence of weak coal layers near target sandstone layers make perforation and hydro-fracturing design more challenging...

... is higher when anisotropic properties are considered, which leads to higher propensity for failure. Shale stability tests demonstrated that most of the instabilities identified in the Laffan and Nahr-Umr formations were mechanical in nature. The optimal mud weight is strongly dependent on the well...

... drilling fluid property annular pressure drilling drilling fluid chemistry hpht fluid loss control ultradeepwater well mud weight degc displacement ppb 1 conversion high pressure high temperature drilling fluid selection and formulation flat rheology drilling fluid system nfrdf system...

... it challenging to drilling engineers and difficult to balance between natural mud losses across the carbonate formations and weak shale that requires higher mud weight. Adding to these challenges, the limited surface locations in the field, that forces the well design trajectory to be deviated, which makes...

... analyses, real-time monitoring and post-drilled evaluation to manage the stability of horizontal wells. The safe mud weight window derived from geomechanics provides the basis for mud weight and mud formulation designs that can be continuously optimized to improve wellbore stability and reduce drilling...

.... Induced factors are mainly related to mud weight chosen for a specific section and related equivalent circulating density (ECD). The impact of can be worsen by drilling practices, as sudden start and stop of mud pump, excessive swab etc. across weak formations. The natural factors are related...

... shales and need high mud weight to guarantee hole stability. Historically an additional casing string used in order to isolate a loss zone prior to the shale formation to drill it with high mud weight. This approach limited the inclination across shales and penetrated it along with the loss zone in same...

... and slow rate of penetrations. Having depleted reservoirs and high-pressure reservoirs in the same hole section of well-A dictates that the mud weight must be higher than the higher reservoir pressure, which puts high differential pressure on the depleted reservoir and causes differential stuck pipe...

... ( Al Tawil, 1990 ). Tool failures may often be attributed to challenging high pore pressure and high temperature conditions. The transition from Lower Khuff carbonates to Basal Khuff Clastics (BKC) often poses a challenge in appropriate mud weight selection due to large differential pressure changes...

... High pore pressure gradients requiring high mud weights for drilling. High mud weights introduce excess solids in the mud leading to reduced drilling efficiency. In addition, the higher bottom hole pressure (BHP) introduced by the higher mud weights lead to lower penetration rates. Losses...

... chemistry drilling fluid formulation weighting material rheological profile hematite drilling fluids and materials plastic viscosity mud weight MicroMAX drilling fluid selection and formulation Upstream Oil & Gas fluid loss weighting agent drilling fluid property micromax barite mud...

... connect between down hole factors and ROP. Factors such as formation density, porosity, Mechanical Specific Energy, Orientation, mud weight, DDI crestal or flank placement of the well and their impact on performance. The crestal wells have come with their own inherent downhole problems and challenges...

... scenarios due to pressure difference between the different layers. For reentry wells isolating the producing from injection layers is not possible due to the existing well schematic restrictions, completion requirements and target hole drainage size and location. MPD was proposed to utilize a mud weight...

... Abstract Drilling wells in potential Unconventional gas reservoirs is coupled with challenges that expose these wells to costly failures. Elevated formation pressure and pressure ramps create uncertainty in determining the mud weight to use in drilling UC wells. Also, various sources of gas...

... drilling parameter drillpipe Artificial Intelligence Upstream Oil & Gas cutter protector ROP whipstock contact force reduction wear simulation casing design revolution worn area sidetrack drilling system drillbit penetration society of petroleum engineers tool failure mud weight...

... RPM Upstream Oil & Gas flow rate mud weight HSI society of petroleum engineers Artificial Intelligence node input parameter mathematical model WOB correlation factor ROP sensitivity analysis Introduction Drilling days per thousand feet (DDPTF) is a measure of drilling...