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GeoSierra News

January 2018   GeoSierra Environmental, Inc. is mobilizing for the installation of an iron PRB (Permeable Reactive Barrier) for groundwater remediation in Norco,                                  CA.The PRB is 300' long, to be constructed from 20' depth down to a total depth of 95' BGS along a busy city street. Any PRB enquiries                                                  contact Deborah Schnell. The PRB construction will be monitored in real time by GeoSierra's active resistivity imaging technology.




August 2017  -  Funding for the Geothermal Energy trial cell has been approved, subject to the bench scale performance of the lithium enrichment cell, for the final                                 design, land and lease acquisition for construction in the 4th qtr 2018 in the Salton Sea Geothermal Field, Imperial County, California. The trial cell                                 will extract groundwater geothermal brines, store and cycle supercritical carbon dioxide in the sub-surface for electric power generation, and extract                               lithium from the geothermal brines. Revenue for the trial cell is from four streams: 1) carbon dioxide storage, 2) electric power generation,                                               3) minerals extracted from the groundwater brine, primarily Lithium, and 4) sale of desalinated groundwater.

                          The lithium enrichment cell uses alternating polarity electrodes constructed from calcined petroleum coke proppant as developed by Asbury Carbons                              in association with GeoSierra, for GeoSierra's ERG - electric resistive heating enhanced bitumen/heavy oil recovery process - see Electric EOR. The                            calcined coke proppant is coated with different compounds to produce the alternating polarity lithium and chloride ion selective electrodes, that extract                            the lithium ions from the geothermal brines and concentrates the lithium ions in a battery grade lithium concentrate solution.

                          Without significant lithium revenue, baseload geothermal electrical power generation in southern California is not an attractive investment, primarily                                 due to the lack of a meaningful tax on carbon emissions, the regulated electrical pricing is tied to the current natural gas price, and the low                                               revenue/MWhr for baseload electricity. Using supercritical carbon dioxide as the subsurface working fluid, a large portion of the baseload generation                               can be provided as on-demand peak generation capacity, thus significantly increasing the revenue/MWhr. The performance of the lithium                                                 enrichment cell and the siting of the field trial in high lithium groundwater are both crucial for a successful field trial of the lithium enrichment                                             process.

                           GeoSierra Environmental, Inc. has been awarded a design/build contract for a 900' long, deep (96' bgs), iron PRB for groundwater remediation in a                                southern Californian city. The PRB is to be constructed along a busy residential street. Any PRB enquiries contact Deborah Schnell.




March 2017  - GeoSierra recently completed a review of the UK 2011 Preese Hall well stimulations. A copy of this review                                                                                                 and recommended alternate stimulation methods are contained in this review report. GeoSierra presented                                                                                               to the Massachusetts Institute of Technology in January on the importance of anelasticity in petroleum                                                                                                       geomechanics - view the abridged presentation.





December 2016                                                                   GeoSierra Environmental Inc. completed the construction of 1,100' PRB at the former Scotia Navy Depot.



October 2016                                                                  GeoSierra is under contract to Massachusetts Institute of Technology (MIT) to assist MIT in a large multi-                                                                                                  year research project on hydraulic fracturing, with specific emphasis into the interaction and propagation of                                                                                                hydraulic fractures with natural fractures and formation interfaces, funded by a major national oil company.


August 2016                                                                    Cascade Environmental Holdings LLC acquires GeoSierra Environmental Inc and Panther Technologies                                                                                                     Inc to enhance their environmental capabilities and services - see announcement.


March 2016                                                                      GeoSierra's geothermal electrical power generation system in enhanced hot ductile low perm formations is                                                                                                 in final feasibility assessment study for field pilot deployment mid-2017.

                                                                                          GeoSierra's carbon energy storage system in ductile turbidite reservoir legacy oil and gas fields is in final                                                                                                   feasibility assessment study for field pilot deployment mid-2017.

                                                                                          GeoSierra Environmental Inc. is finalizing the design and mobilizing for the construction of a 1,000' long                                                                                                     iron proppant Permeable Reactive Barrier at the former Scotia Navy Depot, Glenville, NY. The PRB                                                                                                            is to be constructed to a total depth of 110', and it's injected geometry will be mapped in real-time                                                                                                               by GeoSierra's active resistivity mapping technology. For enquiries into design/build services of PRBs                                                                                                        in the USA contact Deborah Schnell at dschnell@geosierraenv.com.


March 2015                                                                      The planned in situ heavy oil recovery ERG field trial, using electric resistive heating with gravity                                                                                                                drainage is on indefinite hold due to the low price of Kern River crude.

                                                                                          The stimulation of the light oil turbidite reservoirs in the Southern San Joaquin Valley using the Azi-Frac                                                                                                     technology is postponed until the price of WTI stabilizes at $65/bbl or higher.


October 2014                                                                   GeoSierra Environmental Inc. recently completed an iron proppant PRB at a SuperFund site in                                                                                                                   Peterborough, New Hampshire for groundwater remediation. More than twenty (20) iron proppant PRBs                                                                                                     have been installed in the USA by GeoSierra's trenchless technology.

                                                                                          GeoSierra's electrically conductive -8/+20 proppant and grahite electrodes are now ready for deployment in                                                                                               the EOR field trial of the ERG system, i.e. electrical resistive heating with gravity drainage. The first trial                                                                                                     is planned to be conducted in a shallow heavy oil unconsolidated sand reservior in western USA.

                                                                                          GeoSierra's electrically conductive calcined petroleum coke proppant is available in three size                                                                                                                     distributions: coarse -8/+20, medium -20/+40 and fine -40 mesh.

                                                                                          GeoSierra's retrofit stimulation tool for stimulating deep existing wells in turbidite formations is not                                                                                                               expected to be field deployable until mid-2015.



New Technology Magazine Article

 September 2013 & September 2011

Above article describes GeoSierra's Azi-Frac and Halliburton's X-Drain technology for heavy oil enhanced recovery, plus an earlier article from the same magazine of September 2011.


47th US Rock Mechanics/Geomechanics Symp.  June 2013

Grant Hocking presented at the symposium in San Francisco

Hocking, G., T. W. Cavender, T. Hunter and G. Li. 2013. "Comparisons of Plane Propagation from Dilating Casing and Conventional Perforations when Stimulating the Milk River Formation", 47th US Rock Mechanics/Geomechanics Symposium, San Francisco, Paper# ARMA 13-254, June. Presentation


SPE Heavy Oil Conference Canada, Calgary         June 2013

Grant Hocking presented at the conference in Calgary

Hocking, G. and D. A. Walters. 2013 "Vertical Single-Well SAGD with Multiple Producers", SPE Heavy Oil Conference Canada, Calgary, Paper# SPE 165433, June. Presentation 


SPE Heavy Oil Conference Canada, Calgary         June 2012

Travis Cavender presented at the conference in Calgary

Hocking, G., T. W. Cavender, J. Person and T. Hunter. 2012 "Single-Well SAGD Field Installation and Functionality Trials", SPE Heavy Oil Conference Canada, Calgary, Paper# SPE 157739, June. Presentation


Canadian Unconventional Resources Conference     November 2011

Grant Hocking presented at the conference in Calgary

Hocking, G., T. W. Cavender and J. Person. 2011 "Single-Well SAGD: Overcoming Permeable Lean Zones and Barriers", Canadian Unconventional Resources Conference, Calgary, Paper# SPE 148832, June. Presentation



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