Operator saves considerable rig time with insights delivered through SLB digital workflows

When assessing reservoir potential for a Southeast Asia operator, actionable insights were delivered within 48 hours and decisions were made in days—rather than the 2 to 4 weeks normally required. With quicker and better-informed decisions, the operator delivered completion designs much faster and with higher confidence, saving considerable rig time and accelerating time to first oil.

An operator in Southeast Asia spent 2 years planning for an exploration campaign in a shallow clastic environment. The first well was a successful discovery confirming viable oil and gas from thin-bedded and stacked reservoirs with some carbonate layers.

The second target well was located 12 km away, while the nearest offset wells were 15 km away and more than 10 years old. The original acquisition wireline data were either limited or lost, and the operator had to rely on 3D seismic and basic petrophysical interpretations to make assumptions about reservoir potential. Moreover, a major fault was identified near the target well, and the operator was concerned about the well deliverability across the fault. This had to be unlocked quickly to make informed decisions within the critical time frame. 

With so little information surrounding the target well, the operator needed a solution that would deliver actionable insights with minimal turnaround time. Interpretation and modeling workflows that use traditional logging techniques and software platforms cannot solve for thin-bed characteristics and are not designed to provide quick answers. The input parameters are low resolution, and the steps in the workflow are manual and time consuming.

The use of advanced wireline logging technology makes it easier to accurately characterize the reservoir, find all the hydrocarbons, and predict potential, but the initial data acquired may not be interpreted in time to provide information for subsequent runs. This results in high uncertainty when making critical, real-time business decisions on issues such as drilling a sidetrack, planning dual completions, or validating the depth of formation pressure or fluid sampling stations.

Typical data interpretation workflows require significant domain expertise and can use up a lot of time and resources. Several weeks of work with high-end 3D models and simulations are required to deliver comprehensive results.

Together with SLB, the operator was able to tap into a wide range of digitally enabled technologies that would bring more timely insights to its field development efforts. The technologies included:

• Quanta Geo™ photorealistic reservoir geology service
• Rt Scanner™ triaxial induction service
• CMR-Plus™ combinable magnetic resonance tool
• Sonic Scanner™ acoustic scanning platform
• Platform Express™ integrated wireline logging tool
• Ora™ intelligent wireline formation testing platform.

The Quanta Geo service with one-click wellbore insight processing—along with the Rt Scanner service and CMR-Plus tool—were all used for high-definition wellbore imaging, thin-bed detection, structural analysis, facies analysis, sand count calculation, and structural modeling.

Advanced petrophysical logs from the Rt Scanner service, CMR-Plus tool, and Platform Express tool—coupled with fit-for-purpose petrophysical evaluations from the Techlog™ wellbore software platform—enabled a near-real-time evaluation of rock quality and hydrocarbon saturation for accurate laminated sandstone analysis and net-pay calculation. Additionally, nuclear magnetic resonance provided fast, continuous permeability assessments to help optimize downhole testing operations.

The Sonic Scanner platform provided high-resolution slowness numbers, which served as direct input to near-real-time radial profile and anisotropy calculations and further assisted downhole testing and coring operations. Then the Ora platform—with guidance from petrophysics and geology logs—delivered minimum connected volumes, zonal producibility, and reservoir deliverability during the actionable time.

A hybrid approach—combining timely expert petrophysical log interpretation with expertise in creating 3D digital near-wellbore models—gave the operator improved hydrocarbon volumes and new insights into laminated pay zones that would otherwise have been overlooked. The approach also helped pinpoint nearby sealing faults that affected lateral connectivity across the reservoir, as well as nonextensive shale layers that had no effect on connectivity.

This AI-assisted information was derived within 48 hours of the data being acquired. As a result, decisions were made in days rather than the 2 to 4 weeks normally required. Quicker and better-informed answers helped the operator to deliver completion designs much faster and with higher confidence, saving considerable rig time and accelerating time to first oil.

The right decisions made with the right information at the right time convinced the operator to target a third exploration well using other digital solutions provided by SLB, particularly related to wellbore dynamics (dynamic analysis of possible blowout rates and kill rates) and well integrity (via real-time interpretation).

Digitally enabled technologies and workflows, such as those mentioned in this case study, can be applied across various reservoir evaluation applications—including infrastructure-led exploration—to accelerate field development.