Deep Water

Case Study: eRED® Valve Saves Six Hours Rig-Time for BP

eRED® Valve opens and closes remotely, eliminating the need for wireline intervention CHALLENGE – BP needed a more efficient method to set a shallow barrier and to reduce rig time for pressure-control equipment (PCE). In doing this, BP wanted to ensure that the solution chosen would adapt to the existing completion infrastructure that was set in the well. SOLUTION – This water injection completion consisted of...

Tech Paper: Developments in Sandstone HF Acidizing: HF Fluid Compatible with Na or K Brines and Carbonate-Laden Mineralogy for High Temperatures (360°F)

Aminopolycarboxylic acid chelating agent helps with the removal of mineral buildup in sandstone formations Using hydrofluoric (HF) acid for the removal of clays and silica minerals impairing permeability in sandstone formations requires fluids free of sodium or potassium ions. High temperatures (> 300°F) further limit HF acid use and its effectiveness because of potentially damaging effects to the formation and its corrosivity. This paper discusses laboratory testing of...

Tech Paper: Alternative Technologies in Drill-In Fluids for Depleted Reservoirs

Designing the right drill-in fluid system can help minimize productivity impairments Induced losses occur when the drilling fluid density, required for well control and to maintain wellbore stability, exceeds the fracture resistance of the formations. Depleted reservoirs present a particular challenge. As the reserves decline, the pore pressure decreases, which weakens hydrocarbon-bearing rocks. Nearby or interbedded low permeability rocks, however, may maintain their pore pressure. This scenario...

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: 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,...

Case Study: Saving Deepwater Rig Time with Cutting-Edge Technology and Collaboration

USD 10 million saved with openhole wireline services in deepwater presalt exploration wells in Angola CHALLENGE – In Angola, drilling complex formation presalt wells, with water depths of over 5000 ft, can be challenging and expensive. In a logistically challenging country, complications arising from missing the target and any fishing jobs in these water depths can be both costly and detrimental to any exploratory drilling budget....

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...

Case Study: Halliburton Displaces Major Competitor in Wellbore Cleanout Operation

Three times more debris recovered than competitor in a Gulf of Mexico deepwater well CHALLENGE – A major operator in the Gulf of Mexico needed a tool that could successfully perform a wellbore cleanout operation in their deepwater well with a total depth of over 26,000 feet. Their current tool was not able to handle the job. They looked to Halliburton for a solution. SOLUTION – The Halliburton...

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 Guide to Relief Well Trajectory Design using Multidisciplinary Collaborative Well Planning Technology

  Effectively planning a relief well is becoming a required skill for drilling engineers involved in the well planning process Existing rules for relief well planning in the Gulf of Mexico (GoM) have been revised. The US government now requires operators to submit relief well trajectories to obtain a deepwater drilling permit, and BP requires that at least two relief well locations be verified and available for use. Based...

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