Unconventional Resources

Tech Paper: Completion Design Optimization for Barnett Oil Producing Area

Focus on subsurface insight and collaboration are essential to helping discover and produce more oil and gas Throughout the past several years, economic and technological advancements in the North American shale market with respect to drilling and hydraulic fracturing operations have helped create a “typical” operating scheme for producing from the multiple shale formation reservoirs currently being exploited. This typical scheme focuses on...

Tech Paper: Refracturing Design for Underperforming Unconventional Horizontal Reservoirs

Comparison of different Haynesville shale refracturing design treatments, results, and diagnostics This paper discusses refracturing design considerations to increase the estimated ultimate recovery (EUR) on underperforming wells in a refracturing scenario. A method for, and case histories of, using an environmentally acceptable, self-removing particulate diverter that has proven to be successful in the refracturing efforts of horizontal unconventional reservoirs are provided. This method is...

Tech Paper: Facies Architecture, Channel System and Paleoflow Pattern of a Young Sandstone Reservoir using Borehole Resistivity Images

Integrating resistivity images and openhole logs provides facies architecture to enhance recovery to the optimal production The Miocene age shallow unconsolidated sandstone formation in Kuwait contains viscous oil whose distribution is primarily controlled by depositional facies and their diagenetic modifications. This study integrates core-calibrated resistivity images with openhole logs to obtain high-resolution facies logs with continuous array of oriented depositional structures, facies types,...

Understanding the Right Methods for Evaluating Unconventional Reservoirs

For unconventional reservoirs, it is critical to analyze production data and know the selective productivity of the completed horizons When we think about dynamic reservoir evaluation, the first things that come to mind are traditional pressure transient methods such as wireline formation testers, drillstem testing (DST), pressure buildup (PBU) tests, and conventional or modified isochronal tests. Unconventional reservoirs exhibit unique flow behaviors due...

Tech Paper: Engineering Approach to Achieve the First Successful Multistage Acid Frac of a Tight Oil Reservoir Producer in Saudi Arabia

Challenges, solutions and post-decision results In Saudi Arabia, conventional oil reservoirs have been treated using conventional stimulation methods. The challenge is that many of the formations now are tighter and require improved stimulation methods. Fracturing is a major topic discussed in the industry as of late and as such using it in this formation will serve as a trial to shift from conventional...

Case Study: Collaboration and Advanced Engineering Workflow Deliver Record Production Increase in the Permian Basin

Drilling time reduced by 65 percent; cost per BOE reduced by 46 CHALLENGE – An operator in the Permian Basin drilled and completed three unconventional horizontal wells in the Delaware Basin, but, after a year, results had not proven economical. Other wells just outside this operator’s acreage had shown to deliver top-quartile performance. Believing the field had more to offer, the operator turned...

Confronting the Challenge of Calculating Kerogen in Shale Plays

While the presence of kerogen may be magical for geologists, it can represent a nightmare for petrophysicists In unconventional exploration, kerogen is the magic word that makes geologists’ hearts beat faster, as kerogen is a key component of shale plays. It is a solid part of the rock, a hydrocarbon producer, and a source of additional porosity. While the presence of kerogen may...

Tech Paper: Successful Implementation of CO2 Energized Acid Fracturing Treatment in Deep, Tight and Sour Carbonate Gas Reservoir in Saudi Arabia

Treatment reduced fresh water consumption and enhanced well performance Up to three thousand barrels of stimulation fluids are pumped during a single vertical fracture treatment in carbonate reservoir of Saudi Arabia with the objective of creating sufficient conductive reservoir contact for commercial production. The post-stimulation production performance in deep, tight, and sour carbonate gas reservoirs often does not meet expectations due to complex...

Case Study: Fracture Height Confirmed in Australian CSG Well

Service provided understanding on whether horizontal or steeply dipping fracturing existed in an exploration well in the Gloucester Basin CHALLENGE – Halliburton client AGL Energy Limited needed insight into the vertical and horizontal fracture height and complexity of a vertical coal seam gas (CSG) exploration well in Gloucester Basin in Eastern New South Wales, Australia. Fracture gradients in the well were in excess...

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