Using microseismic events to constrain fracture network models and implications for generating fracture flow properties for reservoir simulation

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Microseismic monitoring of hydraulic fracture stimulation treatments has done much to diminish the expectation of engineers and geoscientists that symmetrical bi-wing fractures extending away from the well bore from as a result of the treatment. Mapping of microseismic event locations indicates that more often, zones of high complexity form which suggest multiple rock failure mechanisms could be in play during the stimulation treatment. The complexity of the failure is further complicated, or perhaps explained, by the interaction of the perturbed stresses with existing fractures in the reservoir relative to the unperturbed stress state of the reservoir. Existing fracture planes favorably oriented for shear will fail at lower stresses than are required to create new fractures. Geologic mapping and regional to local in-situ stress information will allow informed interpretation of the resulting microseismicity patterns as well as providing predictive capability for fracturing patterns of treatments in subsequent area wells and production planning. Correlative to the improved fracture mapping is the use of the fracture interpretation as input to fractured reservoir modeling and fractured reservoir simulation. Utilizing microseismicity data not only to constrain location of fractures, but also fracture size, shape and orientation allows creation of improved fractured reservoir models based on geologic concepts and supported by the real time data. In this paper two examples are presented from a hydraulic stimulation of North American mid-continent wells that were monitored with a surface-based geophone array. The resulting microseismicity patterns in both wells show that the fracture development was strongly influenced by pre-existing discontinuities (fractures or faults), which are easily explained by geologic and in-situ stress analysis. The fracture interpretation and microseismicity data from one example is used to generate a discrete fracture network from which fracture flow properties are created in a geocellular model. The resulting model provides a quantitative framework for production history mapping and reservoir behavior, with hard constraints for the behavior of the dominant fractures in the fracture network.

Original languageEnglish (US)
Title of host publicationSociety of Petroleum Engineers - Shale Gas Production Conference 2008
Pages70-76
Number of pages7
StatePublished - Dec 1 2008
Externally publishedYes
EventShale Gas Production Conference 2008 - Irving, TX, United States
Duration: Nov 16 2008Nov 18 2008

Publication series

NameSociety of Petroleum Engineers - Shale Gas Production Conference 2008

Conference

ConferenceShale Gas Production Conference 2008
Country/TerritoryUnited States
CityIrving, TX
Period11/16/0811/18/08

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geology
  • Geophysics

Fingerprint

Dive into the research topics of 'Using microseismic events to constrain fracture network models and implications for generating fracture flow properties for reservoir simulation'. Together they form a unique fingerprint.

Cite this