Hydraulic Fracture Monitoring

ESG delivers a comprehensive suite of microseismic services from in-the-field acquisition to advanced analysis that brings improved data resolution for better field development decisions. ESG’s downhole microseismic offering includes FracMap® and FracMap Clarity™ downhole acquisition processing and analysis services. Through Spectraseis, an ESG managed company, ESG offers Spectraseis Surface Microseismic acquisition, processing and analysis services.

Data Acquisition

With high sensitivity, industry-standard geophone arrays, innovative deployment options and expert field operations teams, ESG can develop a microseismic data acquisition program to ensure the highest resolution data for the best insight and analysis.

Innovative Downhole Acquisition

Single or Multi-arrays

Whether you are looking for a standard single-well acquisition or a more comprehensive multi-array configuration, ESG has the experience and technical expertise to collect highest quality microseismic data. Downhole monitoring deploys 3-component (3-C) geophone toolstrings typically consisting of 12-24 sensors in adjacent production wells or dedicated observation wells using truck-mounted wireline units.


The Whip-array® combines two separate geophone arrays into one unique array that can be deployed simultaneously in the horizontal and vertical sections of a monitoring well. A tractoring system is used to install the array, and re-position the horizontal leg of the array periodically during the treatment program to follow the completion from toe to heel. Each array in the Whip-array® is time-synchronized to ensure the accurate location of events detected on both arrays.


The SuperCable® is a retrievable, multi-use recording system designed specifically to address the trade-off between wireline-based monitoring projects and permanent installations. The system employs ESG’s robust analog sensor instrumentation traditionally used in permanent reservoir monitoring applications, with an innovative method that mimics wireline deployment for reduced cost over long monitoring durations.

Spectraseis Surface Acquisition 

ESG offers Spectraseis surface microseismic acquisition with high-sensitivity broadband instruments deployed in cable-free configurations over a lateral well. Our 3-C geophones record the complete wave field, allowing for richer data and accurate event location.

Preferred deployment configuration for 3C arrays has been a grid approach, which leverages cost savings associated with fewer stations and permiting advantages of nodal units.  Depending on the needs of each project, we evaluate multiple deployment configurations (grid, patch or radial) and can effectively process or reprocess both 1C and 3C data from any passive or active surface array.

Hybrid® Downhole-Surface Acquisition

ESG’s patented Hybrid® configuration combines the use of downhole geophone arrays for detection of small magnitude, high frequency events with near-surface sensors optimized for low frequency signals of large magnitude events. This combination results in broadband detection of seismic events from M-3 to M+3 in one comprehensive system.

Data Processing

Built on 20+ years of experience working in all major North American unconventional formations, ESG has developed an unmatched toolbox of processing and analysis capabilities for accurate and reliable microseismic data processing.  Our workflows prioritize quality control and transparency and are continually evolving based on the needs of our clients.  Staffed with a highly knowledgeable team of geoscientists and engineers, and leveraging the benefits of ‘in-house’ software development, our processing team delivers the highest quality microseismic results in the industry.

Downhole Microseismic Processing

ESG is committed to delivering only high quality microseismic results utilizing reliable, proven and transparent methodologies.  Our workflows place a strong emphasis on quality control, particularly for sensor orientation and velocity model calibration.  All events are located using multi-array co-location algorithms, regardless of whether data was acquired on multi-arrays or single arrays.  With millions of events and tens of thousands of stages processed, operators can have confidence in the accuracy of ESG's microseismic results to make important data-driven decisions.

Spectraseis Surface Microseismic Processing

The S-waves triggered by microseismic events are often the strongest signals recorded in microseismic data. A standard requirement in borehole microseismic and VSP applications, 3-C recording is essential in surface microseismic surveys to capture the full three-dimensional wavefield. Recognizing this, ESG is one of the few surface microseismic providers that focuses on the benefits of 3-C recordings.

ESG uses two powerful approaches to process surface microseismic data.  Time-Reverse Imaging (TRI) is a patented method that delivers rich fracture characterization and improved reliability, eliminating the assumptions and simplifications of ray-based techniques through full elastic migration of microseismic data.  Efficient Multi-component Migration Algorithm (EMMA) is a fast and efficient method based on Kirchhoff ray-based migration that produces robust locations from the combined P & S wavefields.  Surface processing produces event locations, source parameters and fault plane solutions for improved insight into fracture mechanics at play during hydraulic fracture stimulations.

Download the brochure: Surface-based Hydraulic Fracture Monitoring

Data Analysis

ESG specializes in advanced microseismic analysis so you can do more with your data. Our analyses go beyond the cloud to provide high resolution diagnostics and previously unattainable clarity around your fracture network.

Customized deliverables

ESG strongly believes in the value of client-driven analysis to ensure that our customers get what they need from their microseismic datasets to make important operational decisions. Our unique phased reporting process centers around communication with our clients about their project goals and data needs.  

FracMap Clarity™

Our core microseismic acquisition, processing and analysis service has always been known as FracMap®. FracMap Clarity™ builds on FracMap® analysis to offer real-time processing and rapid turnaround for insights related to:

  • Quantifying Productive Fracture Regions
  • Frac Hits and Well Interaction (communication/interference)
  • Well spacing and perforation strategy
  • Completion Efficiency
  • Numerical Production Forecasting Models

FracMap Clarity™ is powered by proprietary microseismic analysis that we call Dynamic Parameter Analysis (DPA), Seismic Moment Tensor Inversion (SMTI) and a novel microseismic-calibrated approach to RTA analysis.

Deliverables include:

  • Refined fracture half-lengths, widths, heights and stimulated volumes;
  • Spatial interpretation of wet vs. dry fractures, parent-child relationships, depleted zones, geology and frac sequencing;
  • Engineering-driven analysis of completions efficiency using proprietary microseismicanalysis and completions data;
  • Reservoir characterization, production forecast and recommendations on well spacing from single- and multi-well RTA models;
  • Relevant event catalogs, fracture dimensions and production models for import into the software platform of your choice;
  • Access to free 3D seismic visualization platform for review of data at any time.