Technical Papers

Tech Paper: First Large-Bore Expandable Liner Hanger Deployment Offshore Gabon – Case Study

Technology helps improve reliability and increase versatility in deepwater operations The capability to reliably deploy large-bore hangers in offshore applications is critical to project success (McCormick et al. 2013). This case study discusses the the deployment of a large-bore expandable liner hanger (ELH) for the first time in a West African country and how the deployment of a 16-in. liner inside 20-in. casing at a water depth...

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 operational efficiency and...

Tech Paper: Pulling Subsea Wellhead Plugs Using a Slickline Downhole Electrical Power Generator Tool

Viable and cost-effective option in Gulf of Mexico deepwater environment A downhole electro-mechanical power-unit tool was used to provide anchored power to pull crown plugs in a single run and in reduced time. This setup has the capability to pull subsea crown plugs that often require greater force than is possible with traditional conveyances without requiring time and resources to reduce hydrostatic pressure. In deepwater environments,...

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 typically chosen for...

Tech Paper: Next-Generation Modeling for Long-Term Development Planning – Case Study

Modeling used to fully integrate the subsurface models with the surface model of an offshore greenfield In conventional modeling, the flow from the reservoir to the wellbore is decoupled from the flow in the surface pipelines and the facilities. This approach is sufficient during history matching; however, it is less accurate for future performance predictions where precise hydraulic calculation is necessary to assess the pipelines and facilities...

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, and environment-related facies...

Tech Paper: Next Generation Diagnosis and Optimization Workflow for Digital Oilfield

Multidimensional surveillance using real-time and historical data handles thousands of wells more effectively for problem identification and optimization Each year, oil companies experience declining production rates and face challenges in terms of sustaining production targets, diagnosing well problems, and designing solutions to address such production decline. Identifying problems and opportunities at the correct moment, without losing time, is critical to the success of a digital oilfield’s...

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 stimulation methods to...

Tech Paper: Rigless Optimization of CT Stimulation in Saudi Arabia’s Offshore Laterals

Well performance improvements up to 200% have been recorded A carbonate field in the northeastern part of Saudi Arabia is undergoing major field development. 75% of the wells are extended reach wells (ERWs) or mega-reach wells. Reservoir pressure maintenance is essential, which is why peripheral water injectors and oil producers (OPs) require matrix stimulation to achieve developmental targets. The field’s offshore portion contains platforms on several...

Tech Paper: A Small Operator’s Implementation of a Digital Oilfield Initiative

Initiative enables right-time, collaborative, and actionable decision-making work processes Small production operators have to efficiently and safely produce oil and gas despite being faced with many challenges to effectively deliver at the desired metrics (e.g., $/BOE). These challenges include a growing number of wells and facilities, massive increases in big data, legacy systems with associated highly manual processes for diagnosing and analyzing operations, and limited human resources....

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