2010년도 제2차 해외전문교육
- Basic Well Test Analysis 개요 -
o 기관 : Schlumberger Technology Services Limited
o 과정 :「Basic Well Test Analysis」
o 강사 : Dr. Anuj Gupta
- 現 Texas A&M University(Doha,Qatar) 석유공학부 부교수로 재직
- 1992년부터 현재까지 17년 이상 미국 유명대학 석유공학부 교수 역임
- 1991년 University of Texas at Austin에서 석유공학 박사학위 취득
- 1983년부터 1992년까지 미국과 인도에서 석유공학 분야 Engineer로 활동하면서 다양한 현장경험 보유
o 일별 교육내용
Topic | Software needed |
Introduction of Instructor/students…pre course survey | |
Introduction to Well Testing: objectives of well testing; testing variables; Compute compressibility of reservoir systems; Exercises | Scientific calculator |
Radial Flow and Radius of Investigation; Ei function, approximations, radial pressure profiles; Exercises | Scientific calculator |
Characterizing Damage and Stimulation: causes of damage skin; causes of geometric skin; skin from pressure drop; flow efficiency ; skin factor and wellbore radius; fracture half-length; Exercises | Scientific calculator |
Semilog Analysis For Oil Wells: Constant-rate drawdown test using semilog analysis; middle time region; permeability and skin factor from semilog graph; buildup test analysis-Horner method; pseudo-producing time; Calculate k, s, pi; Exercises | Scientific calculator |
Well bore Storage: Wellbore unloading; afterflow; Calculate WBS coefficient; Exercises | Scientific calculator |
Topic | Software needed |
Type Curve Analysis: WBS and middle time regions ; pressure response for different skin; equivalent time in analyzing pressure buildup tests using drawdown type curves; Calculate WBS coefficient, k,s from type curve match; Exercises | MS-EXCEL |
Manual Log-log Analysis: estimate WBC from log-log diagnostic plot; estimate k & s from log-log diagnostic plot; Examples, exercises | MS-EXCEL |
Flow Regimes and the Diagnostic Plot: Identify early, middle, and late time regions on a diagnostic plot; volumetric/PSS/recharge behavior, radial flow, linear flow, bilinear flow, spherical flow; factors affecting pressure response duringearly time; boundaries affecting pressure response during late time region; Exercises | MS-EXCEL |
Bounded Reservoir Behavior: superposition; infinite-acting reservoir; No-flow boundary; channels; intersecting sealing faults; closed circular boundary; rectangular reservoir; examples | Scientific calculator |
Build-up Testing and the Diagnostic plot | Scientific calculator |
Estimating Average Reservoir Pressure: MBH method; Ramey-Cobb method; Modifield Muskat method; Arpe-Smith methods; examples | Scientific calculator |
Topic | Software needed |
Naturally Fractured Reservoirs: Matrix & fracture properties; Well test parameters in dual-porosity reservoirs; type curve methods for k, s, lambda & omega-PSS and transient | Scientific calculator |
Hydraulically fractured wells: flow regimes; fracture damage; st. line and type curve analysis; apparent wellbore radius; Cinco type curves | Scientific calculator |
Horizontal Well test analysis: flow regimes; WBS; Examples | MS-EXCEL |
Convolution and Deconvolution: supoerposition in time & space | MS-EXCEL |
Variable flow rate-drawdown: Rate normalizaiton, material balance method; examples | MS-EXCEL |
Variable flow rate-Buildup: WBS & afterflow; rate normalization; balance time method; diagnostic plots; examples | MS-EXCEL |
Multi-well testing: Interference and Pulse testing; examples | MS-EXCEL |
Topic | Software needed |
Semilog Analysis For Gas Wells: Applicability of: pressure, pressure-squared, pseudopressure, and adjusted pressure analysis;pressure drop due to non-Darcy flow; flow and buildup tests for gas wells-semilog analysis; exercises using computer | MS-EXCEL |
Variable Wellbore Storage: multiphase flow; phase redistribution; injection well with changing WBS; leaky packer; temperature effects in gas wells; exercises | MS-EXCEL |
Drillstem Testing: Description, key features; openhole vs cased hole; precedures; Design & analysis; RFT; afterflow; | MS-EXCEL |
Effects of errors in input data: sources of error, effect on WTA; examples | Scientific calculator |
Topic | Software needed |
Integrated Interpretation: Importance of model selection; integrating other data; validation of model; common misconceptions and errors | Scientific calculator |
Well Test Design and implementation: types, objectives, tools; design considerations- reservoir properties, safety & environmental , gage effects; pretest estimates; Design examples | MS-EXCEL |
Practical examples and exercises | MS-EXCEL |
Final Exam | Scientific calculator |
