Unconventional reservoirs are traditionally defined as tight formations with very low permeability. However, this phrase may also be used to describe shale, coalbed methane, heavy oil and tar sands, and gas‑hydrate reservoirs. These reservoirs typically require horizontal well profiles with relatively long laterals. In many cases, the optimal drilling plan is to drill the curve and lateral intervals in a single run at the highest possible rate of penetration (ROP).
Achieving maximum ROP without compromising wellbore integrity
Landing and navigating the well into the geological reservoir target and staying within zone
Reducing risk of stuck pipe and lost downhole tools
Managing the relationship between hydraulics and borehole geology
Monitoring key metrics to stay within safe operating parameters
After recognizing the challenges and risks of drilling in unconventional fields, the critical task is how to avoid, manage, and/or mitigate them. The Drilling Advisor solution — which combines drilling optimization, wellbore stability, and drilling hazard management — offers a proven methodology that is effective in all types of fields.
The Drilling Advisor solution is a collaborative effort with our clients that results in an in-depth knowledge of the drilling risks and solutions associated with a given well or field.
After building field-appropriate geomechanics and drilling-optimization models, we create an enhanced drilling plan that determines the optimal drilling margins. Drilling within the appropriate margins helps to avoid kicks, losses, and hole problems, particularly in the vertical sections drilled before long laterals. The plan is enhanced by accurate initial models and drilling‑hazard‑avoidance strategies that help assure safe, fast, and efficient drilling of lateral sections — which is critical to cost management.
The financial success of an unconventional well depends on efficient drilling. This means not only drilling quickly but also maintaining constant vigilance about safety and wellbore quality. The combination of good drilling practices and the most appropriate technologies — such as logging-while-drilling (LWD) tools and accurate directional-drilling and geosteering services — results in a well that taps into the most productive reservoir rock. Real-time monitoring and evaluation enables our team to identify deviations between models and actual drilling data. This comparison facilitates continuous situational awareness and provides early warnings of possible drilling hazards before they happen, and enables us to make appropriate adjustments as necessary to minimize non-productive time.
Knowledge management is critical in all well types. This process captures the lessons learned in an end-of-well report that outlines key performance indicators (KPI), details opportunities for improvement, and makes recommendations for future projects.
Technology is at the heart of our approach to meeting clients’ needs. We constantly update and refine our technologies to solve new challenges encountered in the field.
The Revolution RSS suite includes directional-drilling tools with industry-leading dogleg and high-pressure, high-temperature capabilities. With the ability to execute deep kickoffs and high-angle builds, the Revolution RSS delivers maximum reservoir exposure in less time.
Our advanced LWD sensors, including the CrossWave® azimuthal sonic tool, provide accurate, real‑time data that improves the quality of pore‑pressure and geomechanical evaluation. Real‑time evaluation helps to mitigate hole‑instability risks, increase operational safety, and reduce formation damage — all of which increases productivity and reduces NPT for our clients.
A versatile tool that enhances rig-floor safety
Combining several traditional casing-running tools in one, the TorkDrive can push down, reciprocate, circulate, and rotate casing without the need for manual handling. The TorkDrive tool can interface with any top-drive system and can be installed quickly, without modifications, to the top drive or rig structure.
Inadequate or faulty information about a reservoir can be incredibly costly. With an integrated drilling services and surface logging (DSSL) cabin at the wellsite, we provide enhanced cuttings characterization, advanced gas measurements, and cutting-edge LWD technologies that reduce geological uncertainty, maximize reservoir contact, and identify optimal production targets.
The moment a core is brought to the surface, it begins to change. Mechanical damage and desiccation results in inaccurate data, which can jeopardize critical decisions about wellbore placement and fracture staging. The RockVault core transportation system helps to ensure proper handling and stabilization of unconventional core samples so that they can be preserved and analyzed.
The combination of our industry-leading technologies and our disciplined approach has produced measurable value for our clients.