Horizontal Well Applications and Performancehttp://www.rwe.com/web/cms/en/1475770/rwe-dea/know-how/drilling/multi-lateral-wells/Multilateral WellsVideo Link:Dual Lateral Well Petrobas, BrazilMultilateral/multilbranch well Petrozuata, Venezuela• Horizontal wells• Extended or ultra reach wells• Multilaterals and multi branching• Intelligent completion• ExpendablesAdvanced Well StructuresWhy do we need advanced wells?2.5Advantages of Horizontal Wells- Increased exposure to the reservoir - Connect laterally discontinuous features - Changing the geometry of drainage - Extend field appraisal horizontally - Reduce drilling costs and risksFlow Pattern: Vertical Well, Radial InflowHorizontal Well, Radial and linear InflowReduce Coning ProblemIncrease Connectivity: Natural FracturesIncrease Connectivity: FaultsIncrease Connectivity: Layered ReservoirsProductivity Index FactorProductivity Index:PI = qhc/ p whereqhc: hydrocarbon flow ratep: drawdown, p= pre – pwfProductivity Index Factor:PIF = PIH/PIVwherePIV= Productivity Index of vertical well PIH= Productivity Index of horizontal wellSummary of PIF DistributionsHorizontal Well Basics:Drilling and GeosteeringGeosteeringDefinition: a well trajectory is actively adjusted using real time information to ensure the lateral stays inside the target zone as designed.Horizontal Well in Reservoir with Bottom WaterDrainage Area: Vertical WellsDrainage Area: Horizontal Wells1.20Geographical Location of ML/MBA well longer than 10km (6.2 miles), long enough to reach from the statue of Liberty to Central Park, has been successfully drilled.How Long is Long?Source of Image:
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