Well Test Analysis in Horizontal Wells Group: BTP-3
What it provides • Initial reservoir pressure (pi) • Permeability thickness (kh) • Skin (S)Menu • Wellbore perforated length (Hw) • Distance of horizontal wellbore to bottom of formation (Zw) • Permeability and effective permeability
Well Testing in Horizontal WellsWhere horizontal drilling is useful:• Natural vertical fractures• Thin layered reservoir• Old reservoirs that no longer have adequate drive mechanisms• Producing reservoirs with extremely high dip angles• Exploration and development of inaccessible locations• Areas where environmental concerns minimize number of surface locations
Problems in Horizontal Well Testing• Three dimensional flow geometry - Interpretation• Zonal variation of vertical permeability
MethodologyMethodology to be opted for B.Techproject well testing analysis inhorizontal well• Literature survey includes – Research papers – Book collection – Chapter distribution for report writing
Methodology• Collection of various horizontal well data from companies:- – different well test data• For the history match and future forecasting – Well logs Work over history – Production history – Injection history
Methodology• Comparison of company’s calculated permeability and skin factor with our calculation done by using – PanSystem – FEKETE (decline curve analysis)• Performance prediction and history matching by using CMG software.