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|AAPG Members||$1,795||$1,995||Non Members||$2,095||$2,295|
Log Analysis of Hydrocarbon-Bearing "Shale" Reservoirs
- INSTRUCTOR :
- George B. Asquith, Texas Tech University, Lubbock, TX
- October 18, 2013
- Norris Conference Center, City Centre Location, Houston, Texas
(if purchased individually)
Registration for the entire week is $1,795 for members, $2,095 nonmembers. Goes up to $1995/$2295, and/or individual course prices increase by $50/course day on 9/16/2013. Course notes, refreshments and lunch buffet included.
No refunds for cancellations after 9/16/2013
- .7 CEU What is a CEU?
Who Should Attend
The course is designed to be of benefit to geologist, engineers and technical support people who are involved in oil and gas exploration and production in hydrocarbon-bearing shale reservoirs. As the title states this is a guide that concentrates on methods used to analyze potential “shale” reservoirs. It is an advance course and assumes the course participants are already well informed about basic well logging principles.
At the conclusion of the one day course the course participants should be able to do the following:
- Apply numerous QUICK-LOOK Methods to evaluate and map potential “shale” reservoirs.
- Be able to determine thermal maturity from well log data.
- Determine total organic carbon (TOC) by several methods including Schmoker, Passey, etc.
- Determine volume of clay (Vcl), total porosity, effective porosity, water saturation (Sw), permeability (ka) in a “shale” reservoir using both a standard logging suite and with GEOCHEM logs.
- Be able to calculate OGIPscf and OOIPstb utilizing both a standard well logging suite and using GEOCHEM log data.
- Determine formation water resistivity (Rw) in a shale.
This is a one day course that will include background material on hydrocarbon-bearing shales, methods of evaluation, and case studies of both gas and oil bearing shales. The course begins with a quick review of general information about hydrocarbon-bearing shales that will include: 1.) areal distribution, 2,) classification, 3.) hydrocarbon resources, 4.) key geological and engineering parameters, 5.) a comparison of the mineralogy of an average shale to a hydrocarbon-bearing shale, 6.) shale porosity and permeability, and 7.) an expected shale production model. Next the log parameters used for a quick log scan evaluation are presented along with the standard quick-look methods. All of these quick methods are designed so that the geologist or engineer can evaluate the potential shale to determine if a more detailed log analysis is required. The parameters included in a more detailed log analysis include the determination of: 1.) total organic carbon, 2.) effective porosity, 3.) effective water saturation, 4.) hydrocarbon-filled porosity, and 5.) permeability.
The methods for determining the thermal maturity of organic shales will include: 1.) vitrinite refection (Ro), 2.) coloration of spores and conodonts, and 3.) determination of thermal maturity from log data [Maturity Index ( MI; Zhao & others, 2007). The determination of thermal maturity is an important step in the analysis of an organic shale, because the level of maturity (i.e. oil or gas) determines how the log data will be analyzed. The next step is the determination of TOC(wt%) from log data. The methods outlined are Passey & others (1990), the Schmoker Equation, and uranium content from spectral gamma ray logs.
If the potential shale is a gas reservoir the next step is the determination of the adsorbed gas content (gc in SCF/ton). The two methods for determining adsorbed gas content that will be outlined are the Langmuir Isotherm and the TOC versus gc (SCF/ton) methods. A flow chart is provided to guide the geologist/engineer through the analysis.
There is a review of the application of non-standard well logs to the log analysis of hydrocarbon-bearing shales that includes Nuclear Magnetic Resonance (NMR) imaging logs, Geochemical logs, and SWS Multi-Frequency Polarized Dielectric Scanner.
Four case studies Devonian Woodford Shale [GAS], Permian Leonard shales [OIL], and two Permian Wolfcamp shales [OIL] are presented to illustrate the methods outlined in the course. At the end of this section is a list of an ideal data base (logs and core data) for hydrocarbon shale analysis.
Next is a review of the Array Sonic logs, and their use in the evaluation of horizontal stresses and orientations [maximum and minimum] and fracture orientations. The final section is a review of methods that can be used to determine formation water resistivity (Rw) in shales.