North America GTW
Sweet Spots, Reservoir Compartmentalization and Connectivity
6-7 August 2013 | Norris Conference Center | Houston, Texas
as of July 10, 2013
Practical Implementation of Stratigraphic Compartmentalization in Turbidite Lobe Reservoirs
Antoine Bertoncello, Hess
In sheet-sand reservoirs, the presence of shale draping the lobes tends to compartmentalize the reservoir sand into multiple flow units. This stratigraphic compartmentalization has dramatic implications in term of field development and hydrocarbons recovery, and has to be characterized as early as possible in the field life. Geochemistry and fluid pressure analyses along the well path are common tools to identify the different flow units (a flow unit corresponding typically to a lobe) but they provide an incomplete description of the full 3-D reservoir compartmentalization. A traditional approach to achieve a complete reservoir description from sparse data is to use geostatistical algorithms. However, geostatistics are ill-equipped to integrate compartmentalization information and to generate the corresponding shale drape geometry.
Competing Approaches to Identifying and Evaluating Sweet Spots to Optimize Drilling, Completions, and Stimulation
Larry Chorn, Halliburton
Microseismic and Sweet Spots
Peter Duncan, MicroSeismic
Focusing Stimulation Efforts on Sweet Spots in Shale Reservoirs for Enhanced Productivity
Khaled H. Hashmy, Weatherford
Measurements on drilling fluid and drill cuttings and new LWD techniques that help identify sweet spots and recognize stress anisotropy are described. Stimulations are more effective when they are concentrated on sweet spots.
Completion and Stimulation of Unconventional Reservoirs: What Makes the Difference in Well Productivity?
Randy LaFollette, Baker Hughes
This presentation will review reservoir mobility vs stimulation requirements, focus on data mining highlights from different formations and case studies. The with respect to fracturing fluid and proppant selection.
Using Petroleum Systems Analysis to Evaluate Play Fairways in the Bakken Shale
Jay E. Leonard, Platte River Associates, Inc.
Petroleum systems and play analysis in conventional plays consists of a geological evaluation of the petroleum system elements (source, reservoir, trap, seal, and charge access). These elements are then translated into a “probability of geologic success” or some other measure of risk. The unconventional petroleum system should be evaluated with exactly the same conceptual approach. However, unconventional systems differ from their conventional counterparts. These differences include the nature of the geologic proxies used to evaluate the petroleum and play systems, and their relative contribution to play risk.
Finding Fluid Conduits or Barriers through Seismic Fault Extraction—A Revolution in Sweet Spot and Compartment Mapping
Ralf Oppermann, OPPtimal Exploration & Development Pty Ltd
This talk discusses the basic workflows to highlight faults from seismic data at very high resolution and describes the calibration methods as well as the general benefits that can be obtained when linking fault extraction results with other observations, which typically yields completely new insights into the effects that faults & fractures can have on fluid flow in the subsurface.
It will be shown how fault/fracture networks are often directly linked with drilling problems (fluid losses, geomechanical/borehole stability issues) or production problems (water or gas channelling along fault planes, crossflow between wells, reservoir compartmentalisation etc.). It will also be shown how faults can be directly linked with hydrocarbon shows and productivity in tight, fractured and unconventional reservoirs, where these faults can provide direct access to productive natural fracture networks.
Reliable Sweet Spot Identification from Seismic—Case Studies from Around the World
Ralf Oppermann, OPPtimal Exploration & Development Pty Ltd
During this talk, several international fault extraction case studies from America, Europe, Africa, Middle East, Asia and Australasia will be shown, focusing on some of the following resource plays:
- fractured Carbonates (Middle East, Tunisia, Denmark, USA, Canada, Kazakhstan, Vietnam
- fractured Carbonate Basement (Vietnam)
- fractured Granite Basement (Yemen)
- shale gas (USA, Canada)
- tight gas & oil (India)
- compartmentalised reservoirs (Holland, Germany, India)
- coal seam gas (Australia, Botswana)
- coal mining (Australia)
- ore mining (Finland)
- geothermal (Australia)
- geosequestration (Australia)
A few case study movies will help to illustrate the 3-dimensionality and complexity of the visualised fault networks.
Relative Permeability in La Luna Formation (Colombia) using Digital Rock Physics
Joel Walls, Ingrain
As more organic rich mudstone resource plays are developed internationally, the need to understand flow potential and long term well performance increases dramatically. Many international locations have limited infrastructure for the economic development of these low permeability formations. Therefore, operators require comprehensive rock data and careful reservoir modeling to help reduce the risk of early-stage development. This paper describes the methods and results of a project designed to quantify the range of expected permeability and relative permeability in samples from the La Luna formation, middle Magdalena Valley, Colombia.
Seismic Attributes and Workflows for Sweet Spot Determination (tentative)
Helping to Understand Compartmentalization and Reservoir Segmentation Using Mass Spectrometer Mud Gas Analysis
Bruce Warren, Crown Geochemistry, Inc.
The development of a portable mass spectrometer suitable for drillsite deployments has made possible a new generation of geochemical evaluation that is contributing significantly to better reservoir understanding and in some cases improved completion strategies. The analysis of organic and inorganic compounds in both lateral and vertical wells can yield a useful depiction of heterogeneity by determining segments of compartmentalization related to variability in composition of inorganic and organic compounds, permeability, stratigraphy and micro-fracturing.
Introducing Signal Processing Techniques as a Means to Maximize Extracting Geomechanical Data from Petrophysical Logs
Hamed Soroush, Shell Exploration and Production Company
Well logs are key input data to construct and verify geomechanical models and unquestionably the most important data when it gets to rock property modeling. In addition, they usually show correlations, in some extent, with down-hole information such as fractured intervals, enlarged whole sections, oil/water/gas bearing zones etc. Although there are many petrophysical approaches to extract highest amount of information from logs, there is still a lot more valuable information buried in different frequency levels of log signals which cannot be pull out with the common petrophysical methods.
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