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SpectraChem™ |
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Through the precise identification and measurement of injected chemical
tracers returned in flowback samples, ProTechnics chemical tracer diagnostics offer
solutions for many applications:
- Completion engineers gain valuable insights into cleanup efficiency and mechanisms,
proper operation of staging devices and impediments to post-treatment wellbore flow.
- In smart wells, chemical tracer analysis clearly shows the mechanical operation
of sliding sleeves in addition to zonal contribution.
- When communication with nearby wells is suspected, SpectraChem tracers can positively
identify communication from the treatment well to nearby offsets.
With the inclusion of CompletionProfiler production logging, production
performance can be conveniently and efficiently analyzed in tandem with
tracer cleanup studies.
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SpectraChem diagnostic services are a powerful tool for quantifying and understanding
flowback in all types of completions, including single-stage, multi-stage and complex
horizontal wells.
Plotted over time, SpectraChem analysis determines which segments and, more importantly,
how much of each segment is contributing to overall flowback. Armed with this vital
information, knowledgeable decisions can be made regarding:
- Fluid type selection
- Breaker selection and design
- Flowback operational procedures
From these measurements, fracture cleanup and flowback efficiency can be determined
so that completion practices can be optimized to achieve maximum effective frac
length.
Plotted over time, SpectraChem analysis determines which segments and, more importantly,
how much of each segment is contributing to overall flowback. Armed with this vital
information, knowledgeable decisions can be made regarding:
- Fluid type selection
- Breaker selection and design
- Flowback operational procedures
From these measurements, fracture cleanup and flowback efficiency can be determined
so that completion practices can be optimized to achieve maximum effective frac
length.
Multistage Completions In multistage completions, SpectraChem
tracers allow returns from each uniquelytraced stage to be identified. Sample analysis
yields specific data for establishing zonal cleanup contribution. These measurements
are critical to designing
and achieving a more productive frac treatment. Specific applications include:
- Co-mingled zonal cleanup contribution
- Flow-through bridge plug completions
- One-trip, coiled tubing stage
completions
- Mechanical sleeve completion systems
- Smart well completions
Horizontal Completions SpectraChem tracer services are ideally suited for today’s
horizontal well completions in both conventional and unconventional reservoirs.
Determining flowback profiles in these complex wellbore configurations can help
increase operational efficiencies and production. Recognition of chemical interference
in close-spaced offsets allows informed decisions concerning well spacing issues.
Horizontal applications include:
- Treatment well flowback profiles
- Nearby offset frac interference
Treatment well communication with offset producers
is illustrated here. This plan view is from an analysis of
potential frac fluid interference in 12 offset wells.
Tracer Injection and Analysis
During pumping operations, SpectraChem technology introduces as many as 18 different
chemical frac tracers (CFTs) into the fracturing fluid system. These 100% water
soluble, HSE-friendly chemicals are precisely injected using the ProTechnics PT
4000 injection system. Injection is
performed on the low-pressure side of the pumping units for enhanced safety and
operational flexibility. After treatment, flowback samples of the
injected tracers are collected for laboratory analysis. Using gas chromatography
and mass spectrometry, ProTechnics quantifies the presence of the CFT’s in the parts
per billion.
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