Integrated Produced Water Re-Injection Management (PRO09)

Description

The injection of water into reservoirs can result in a number of serious problems. One reason for questioning existing water treatment systems is to combat complexity. Water handling systems are becoming too complicated. Many prejudices and misconceptions have arisen that simple solutions found in normal operating techniques are being lost in the mire of complication. The impact of chemicals in this process and their pros and cons will be highlighted.
This course will cover the produced water handling, treatment and re-injection. The aim is a modern, clear understanding (including guidelines) of water quality definition, measurements and its impact on the injection well behaviour in the long term. Regarding the water quality for injection one can say: You can’t optimise what you don’t measure.

Course Level: Advanced
Duration: 4 days
Instructor: Wolfram Kleinitz

Designed for you, if you are...

A production or facility engineer, project manager, production chemist, a member of field operational staff currently or potentially involved in water treatment in production operations
A professional seeking an up-to-date overview on the impact of water treatment and aspects for re-injection

How we build your confidence

The course focuses on practical onsite experience. Case histories and practical examples will be subdivided into the following sections: Required quality for re-injection, separator improvements, field experience, efficiency of modern water treatment units. Lectures are supported with video clips.

The benefits from attending

By the end of the course you will feel confident in your understanding of:

Types of formation damage and their impact on injectivity
Production chemistry aspects with impact on treatment and re-injection
Water: Brine composition and analytical interpretation of ion tracking
Scale formation and rules of SRB in operation (Sulphate Reducing Bacteria)
Matrix versus frac injection
Definition of water quality and the WQR and how to determine the WQR onsite
Mode of action and undesirable side effects during well stimulation
Relation between sandstone and chalk reservoirs for injection
Occurrence of plugging material during daily operation
Screening for optimal treatment units in the tail-end phase
Guidelines for sustained water quality for re-injection
How to control the treatment unit efficiency in a long term
Modern ways of tracking and elucidating injection behaviours

Topics

Reservoir brine properties and their physicochemical behaviour
- Definition of terms in oil production and treatment
- Basics on scale formation during production, treatment and injection
- Modern aspects on production chemistry
- Rules of bacteria in water flooding systems
Petrophysical basics and formation damage
- Overview and common formation damage problems
- Clay minerals and rules of clay swelling
- Permeability reduction of porosity and permeability
- Wettability alteration during water injection
Water Quality Ratio (WQR) and its application in predicting injection life-time
- Current models for predicting life-time of injectors
- Focus on the theory of Barkman/Davidson
- Discussion of field application
- Examples: How to calculate the WQR
Modern water treatment units
- Basic operational concept for water treatment units
- Impact of oil water and concentration of suspended solids on water quality
- How to control the unit efficiency in a long term
- Field tests: Small size unit compared to big size implementation
Field experience
- Injection strategy at early production and in the tail-end phase
- Tracer application to control flooding efficiency
- SRB activity and plugging behaviour
- Recommendation on modern surveillance programs
Water Quality Ratio (WQR) device for field application
- Test unit description and application
- Guidelines for onsite tests
- Interpretation of continuously measured water quality
- Analysing weaknesses in treatment and injection systems
Stimulation concept and guidelines
- Aspects on chalk and sandstone reservoirs for injectors
- Guidelines of treatment slug selection
- Coil tubing job versus bull-headed treatment
- Downhole sampling and analyses during back production