OG90
Course Contents
Module 1 - Oilfield Microbiology Overview and Corrosion
Key Topics
- Introduction to Oilfield Microbiology
- Overview of microorganisms
- The oil field and petroleum microbiology
- Bacteria growth and survival
- Biofilms and microbial activity
- Microbes encountered in oilfield systems
- Overview of problems caused by microorganisms
- Positive impacts of microbes in the oil industry
- Microbiologically Influenced Corrosion (MIC)
- Introduction to MIC
- The difference between MIC and other corrosion
- Classification (types of corrosion)
- Other causes of corrosion
- Microorganisms related to MIC ex (SRB, GAB,….etc)
- Microbiologically influenced corrosion (MIC)
- Assessment and mitigation of MIC
Module 2 - Microbial Sampling and Control Methods
Key Topics
- Microbial Sampling, Identification & Monitoring
- Classical and new approaches to microbiological monitoring
- Sampling procedures for microbiology covering water, solids, and surfaces
- Good sampling practices
- How to sample water, oil, and solids
- Importance of on-site sampling and representative samples
- Samples preservation
- Scales types & analysis
- Microbial analysis techniques
- Implementing a microbial monitoring plan
- Cost-effective Plan.
- Process control issues caused by microorganisms:
- Where microorganisms are commonly found in:
- Injection, production, and water treatment systems
- The problems you might not expect.
- Where microorganisms are commonly found in:
Module 3 - Microbial Sampling and Mitigation Measures
Key Topics
- Microbial Sampling, Identification & Monitoring
- The common error in monitoring
- Mitigation options
- Importance of cleaning and intelligent pigging
- Chemical disinfection
- Resistance to chemical action
- Biocide testing and evaluation
- Control in sea water injection systems
- Control in non-sea water injection systems
- H2S scavenging, Methods and protocols
- Molecular microbiology methods
- Traditional microbial cultivation methods
- Quick kits for microbial assessment
- Practical Detection of bacterial organisms in lab
- Mitigation measures for different scenarios:
- What to use where and more importantly
- What not to use where.
Module 4 - Reservoir Souring Assessment and Prediction
Key Topics
- Reservoir Souring: Why is it Important and How Does it Happen?
- Souring of oil and gas fields – why, how, and when
- Importance of souring – safety, sour service materials, product quality
- Causes and consequences of microbial reservoir souring,
- Chemical and physical requirements (nutrients, temperature, pressure)
- Chemical calculations and chemical pump adjustments
- Which organisms are responsible?
- The likelihood of souring
- Assessment of biogenic reservoir souring
- Are they indigenous or introduced?
- Seawater injection – the usual cause
- Reservoir souring and predictions
- Predictive modeling
- Field planning to mitigate reservoir souring
- Effect of reservoir structure and geology on souring
- Scavenging of H2S by Iron minerals in reservoirs
- Partitioning of H2S between oil, water, and gas
- Effect of GOR & water cut on perceived souring
- Reservoir souring case studies
- Reservoir Souring Assessment and Prediction
- Using downhole samples
- Importance of a fixed planned sampling campaign
- Calculating mass balance of H2S – importance and methods
- H2S generation rates estimated from laboratory experiments
- Measurement of H2S in the field, all 3 phases
- How to predict the potential for souring before field development
- The biofilm souring model
- History matching of souring
Module 5 - Souring Controls & Microbial-enhanced Oil Recovery (MEOR)
Key Topics
- Controls of Souring and Case Histories
- Biocides used in water injection systems
- Biocides designed for downhole use
- Why standard biocide control treatments may not work
- Novel microbial control methods
- Nitrate – sometimes good, sometimes not
- H2S scavengers
- Industry standards for souring
- Microbial-enhanced Oil Recovery (MEOR)
- Introduction
- MEOR applications
- Microbes used in MEOR
- Screening criteria
- Putative MEOR mechanisms
- Souring risk from MEOR treatments
- Worldwide cases of souring
- Biocide reservoir treatments
- Nitrate reservoir treatments
- Impact of other production chemicals
- Microbial control methods – biocides
- Microbial control methods – novel and developing methods