STRUCTURAL GEOLOGY DIVISION

Upcoming Division Events

The potential fault reactivation induced by pore pressure changes under the strike-slip regime: case study of 3D coupled reservoir geomechanical modeling in the St. Lawrence Lowlands, Quebec  
Speaker: E. Konstantinovskaya, University of Alberta
Location: Schlumberger Canada, Province Conference Rooms 2nd floor - Palliser One Building, 200, 125 9th Avenue SE 
September 6, 2019, 12:00noon


*CSPG members can register for free and track their CPD hours!
 
ABSTRACT 
E. Konstantinovskaya1, L. Qiuguo2, J. A. Rivero2, M. M. Faskhoodi2, B. Campbell2
1 University of Alberta, Edmonton, AB, Canada, konstant@ualberta.ca, 2 Schlumberger, Calgary, AB, Canada, lqiuguo@slb.com, jrivero7@slb.com, mfaskhoodi@slb.com, bcampbell4@slb.com


How high-angle normal faults would be reactivated under the strike-slip tectonic regime if pore pressure increases during injection operations? What parameters would control shear slip localization? To answer these questions, 3D coupled reservoir geomechanical modeling (Petrel-Visage-Eclipse) is carried out in the St. Lawrence Lowland region. We evaluate the potential for shear failure along the pre-existing sub-surface Yamaska high-angle normal fault under the present-day strike-slip tectonic regime. This study represents a follow-up of the previous step of 2D geomechanical modeling aimed to assess the potential of safe CO2 injection into a sandstone reservoir (the Covey Hill Formation) within Early Paleozoic sedimentary basin in the Becancour area located at 110 km southwest of Quebec City. The Yamaska Fault in the area is oriented NE-SW with a strike varying from subparallel to ~35° to the orientation of maximum horizontal stress SHmax (NE63°) and dips to the SE at ~60° with  ~800 m vertical throw. Multiple runs in the 3D model simulate several steps of increasing pore pressures due to CO2 injection in the Covey Hill sandstone reservoir within the footwall at ~1.2 km of depth. The pore pressures increase by 4, 6, 8 and 15 MPa, respectively, at the four time-steps simulated. Our modeling results show that plastic shear deformations along the Yamaska Fault are initiated at the step of pore pressure increase by 8 MPa and a larger area slipped during the next injection stage. The non-linear geometry of the fault results in localization of plastic shear strain on the prominent fault segments optimally oriented, while other segments remain inactive.  The dextral shear slip occurs mostly at the depth level of the injection interval propagating upward to the top of the Utica shale in highly stressed fault segments. We analyze a field example of the Montmorency Fault, an outcrop analog of the Yamaska Fault and an example of past strike-slip reactivation of a high-angle normal fault that was likely caused by rotation of paleo-stress field in the Late Cretaceous – Early Tertiary. Our study helps to quantify the risk of fault reactivation induced by injection operations.

BIOGRAPHY 
I joined University of Alberta in 2017 as Associate Director of Integrated Petroleum Geoscience Program to teach reservoir geomechanics, seismic interpretation and supervise capstone projects. Before that I had a career both in academia and consulting industry, having worked at Schlumberger as Moscow Team Leader of geomechanics engineers, as research scientist at INRS-ETE, Quebec City, and Geological Institute of Russian Academy of Sciences, Moscow, and as invited professor at CNRS-University Montpellier II. I obtained BSc Degree in Geology at Lomonosov Moscow State University and PhD Degree at Geological Institute, Russian Academy of Sciences. 

My interests involve structural geology and tectonic evolution of orogenic belts and sedimentary basins, analog modeling of fault kinematics, fault architecture and influence of natural and hydraulic fractures and faults on the distribution and state of stresses, pressure regimes, and permeability of flow units in subsurface reservoirs. My recent research focuses on predictive models of faults hydraulic behavior and fault shear reactivation potential and topseal breaching under the in situ stress and pore pressure changes caused by depletion or injection operations.

UPCOMING FIELD TRIP

Folds, Fractures, and Reservoir Compartmentalization in structurally complex reservoirs: Canyon Creek Southern Canadian Rocky Mountains

Leader: 
Paul MacKay, Shale Petroleum
Date: September 21, 2019 (1 day)
Time: 7:15am, depart 7:45am (anticipated end time- 7:00pm) 
Field trip location: Canyon Creek 
Meeting location and further details will be provided to registrants 1 week prior to departure. 

TRANSPORTATION NOTICE: 
Registrants will be asked if they will participate in carpooling for this field trip. No other transportation will be provided for this event. 

The carpool meeting location will be emailed to the registrants 1 week prior to departure.  

CSPG Member: Free 


This is a member only event. If you would like to become a member please complete a membership form
Registration close: September 13, 2019 
CPD: 8

PLEASE NOTE: Limited registration spaces available. 

ABSTRACT: 
The objective of the field trip will be to visit the section of outcrops in the McConnell Thrust sheet that lie along Canyon Creek to the West of the Powderface trail in Kananaskis Country.

This trip contains good examples of folded and fractures Paleozoic carbonate strata.

The patterns in the fracture distribution and structural style of the outcrop are similar to those in gas reservoir within the Alberta Thrust Belt. The outcrop provides an opportunity for the geologist to see the geometry and distribution of fractures in three dimensions and to view the relationship between the fractures and the geometry of folds. Although the situation within a buried reservoir may differ, the Canyon Creek structures are useful analogs to many fields that produce a significant amount of hydrocarbons within the Rocky Mountains.

To reach the outcrop one must hike approximately 4 kms on the dry bed of the river on an easy walk.

NOTE: THE FIELD TRIP IS WEATHER DEPENDENT, IF HEAVY RAIN THE FIELD TRIP WILL BE CANCELLED

Division Sponsor


Committee Profile
Talks are free; please bring your lunch. If you would like to be on the Structural Division e-mail list, or if you'd like to give a talk, please contact Valentina Vallega or Dragan Angejelkovic. Division policy is that no photos or videos of the presentations are permitted.

Committee Members

Valentina Vallega: VVallega@slb.com 
Dragan Angejelkovic: DAndjelkovic@slb.com 
Tim Hartel