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2008

Bioremediation project achieves drilling, environmental objectives onshore Bangladesh

By Chris West, Jim Hunt, Kevin Bowen, Chevron Bangladesh; Gary Cole, Greg McEwen, M-I SWACO A combination of demanding well objectives in a remote and environmentally sensitive area prompted Chevron Bangladesh to achieve their drilling objectives by using an all-encompassing, fully integrated drilling fluid and drilling waste treatment plan for the Moulavi Bazaar (MB) and Bibiyana (BY) field development programs. This approach matched synthetic-base drilling fluid technology with a proven land-farming bioremediation treatment technology, which allowed the successful remediation of drilled cuttings within the limited time frame dictated by the local monsoon weather window. The primary objective was to successfully reduce the total petroleum hydrocarbon (TPH) of the produced drilled cuttings to a minimum of 1% during the dry season. ...

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Company initiatives show drilling industry is taking environmental commitment to heart

By Jerry Greenberg, contributing editor Being environmentally friendly is a great catch phrase, but it doesn’t mean much if companies and people don’t take that commitment to heart. This means not only making a commitment to protect the environment by using the best resources and programs available to reduce environmental hazards but also winning the hearts and minds of employees who take the commitment seriously. In that respect, there is perhaps no industry more aware of the environmental consequences of its actions and does more to mitigate environmental hazards than the oil and gas industry. Sometimes it seems that the environmental bandwagon hasn’t been rolling very long, but some drilling contractors have been protecting the environment with rig-based initiatives and ...

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Bigger coil sizes, hybrid rigs and RSS advances pushing CT Drilling to next level

Old ways may die hard, but in an era of declining, expensive and difficult-to-tap resources, new and unconventional methods of oil and gas exploration are challenging the status quo. Among innovations rising to the top of the wave is coiled tubing drilling, which, while not new, is evolving through recent advances in technology and design as a viable alternative to conventional, jointed pipe drilling in shallow reserves – and beyond. The method has been used successfully for the past decade in Canada, where up to an estimated 40% of wells are drilled with some form of coiled tubing (CT). Why CT drilling has been so slow to come to the continental United States, where it represents only 1-2% of all ...

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Abbot Group chairman looks ahead following $2 billion First Reserve deal

By Jeremy Cresswell, contributing editor Early March saw the completion of a $2 billion deal that took the UK’s Abbot Group off the London Stock Market and into private equity ownership through First Reserve, but with chairman Alasdair Locke and his management team still firmly in command. Mr Locke is regarded as a most skilful company builder. The manner in which he picked up KCA Drilling, placed it at the heart of what was essentially a shell company (Abbot) and capitalized on the classic brand’s reputation and management team strengths to create Britain’s only drilling company with real clout is a story of determination and calculated risk taking. “Abbot was my private company that acquired KCA in 1992,” Mr Locke ...

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Weatherford sensors track vibration to increase ROP, temperature changes for early kick detection

By Jerry Greenberg, contributing editor Weatherford’s newest tool in its Hostile Environment Logging (HEL) MWD system is its True Vibration Monitor (TVM) sensor, which is focused on providing pertinent downhole information to monitor bit and BHA vibration, primarily lateral and axial vibration, as well as rpm. Drilling is all about moving energy from the rig floor to the bit. If the driller is getting the maximum amount of energy, the drilling process is optimized and obtaining the most footage possible. Any time vibration occurs in the drill string as a result of torque or drag, for example, the bit is being robbed of energy and rate of penetration (ROP) suffers. With TVM, the company is better able to identify what ...

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Seismic while drilling keeps bit turning to right while acquiring key real-time data

By Jerry Greenberg, contributing editor Under development since 1988 and commercialized in 2003, the Schlumberger seismicVISION seismic-while-drilling service (SWD) enables operators to make seismic measurements during the drilling of the well. Operators can thus reduce uncertainty, optimize drilling decisions and improve safety. Previously, in most environments, this meant stopping the drilling process and running a wireline survey. Since its commercialization, Schlumberger has been working on enhancements, the latest of which is the capability to send real-time waveforms from downhole to the surface. Previously, wave-form information was retained in the tool’s memory to be retrieved when the BHA was tripped out of the hole. Now, with real-time waveform capability, waveform data can be accessed through mud pulse telemetry to increase the ...

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PathFinder pushes temperature, pressure limits with Survivor series of MWD/LWD

Compared with other sensor measurement tools such as wireline logging, logging-while-drilling (LWD) tools must stay downhole for extended periods of time and are subject to high vibration. While ratings of 25,000 psi and 350ºF may not be considered HPHT for some drilling environments, they are generally categorized as high pressure, high temperature for LWD tools, said Alan Rennie, operations specialist for PathFinder Energy Services. It’s “fairly straightforward mechanically to get systems that will withstand 25,000 psi – there’s just a design and manufacturing cost associated with it,” he said. But mechanical failures are not the issue with improving HPHT ratings for LWD tools. The real challenges, he said, are with electronics surviving downhole in temperatures up to 350ºF. “There are ...

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Halliburton’s next-generation LWD sensors read faster, clearer deeper into formation

The InSite Generation, being launched by Halliburton’s Sperry Drilling Services, is a new generation of LWD sensors and applications that provide deeper reading, higher resolution measurements with faster telemetry and greater reliability, said Blaine Comeaux, Sperry global marketing manager. Advanced miniaturization techniques have been used with the InSite Generation to reduce the number of components while increasing power. So far, three InSite sensors have been made available: the azimuthal deep resistivity (ADR), the azimuthal focus resistivity (AFR) and the IXO. The InSite ADR is a deep-reading (up to 18 ft) resistivity device that can measure in 32 directions around the borehole. “That means if we detect a change in resistivity, we can tell whether that’s happening above us, below us, ...

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INTEQ magnetic resonance LWD tool successfully measures T2 for the first time

By Jerry Greenberg, contributing editor Baker Hughes INTEQ’s MagTrak LWD tool provides a comprehensive range of magnetic resonance data for the operator, including formation porosity, bound and volume, free fluid volume, permeability, hydrocarbon detection and T1 and T2 distribution spectrums. Because the tool is based on magnetic resonance technology, it does not require a radioactive source. Porosity measurement is not dependent on formation lithology. The tool, the first to measure T2 successfully, according to the company, is capable of delivering real-time T2 distributions. Measuring T2 results in significantly more measurements, higher resolution and more accurate information for interpretation. That aids decision-making to optimize wellsite efficiency, safety and hydrocarbon recovery. The real-time applications and benefits include identifying potential borehole problems by ...

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Advances in MWD, LWD, SWD continue to give drillers ever-clearer downhole pictures

For decades, the industry has been chasing the “look-ahead” dream – being able to see ahead of the bit as we drill. Whether that’s still an unfulfilled dream with current measurement-while-drilling (MWD), logging-while-drilling (LWD) and seismic-while-drilling (SWD) tools is up for debate. According to Schlumberger, its newest SWD tool, seismic-VISION, can send up to two seconds of partially processed stacked waveform data to the surface in relevant drilling time, allowing for a limited look-ahead potential. The primary technological breakthrough enabling the system was building a downhole clock accurate enough to measure milliseconds and rugged enough to survive downhole, the company said. At the same time that we’re trying to look ahead of the bit, we’re getting significantly better at looking ...

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