Saturday, August 27, 2016

Xplotter - New Updates; multi-well cross plots and some nice color palettes

While starting a petrophysics consulting business I am making software on the side to support the consulting.  This is to combat the high cost of the major petrophysical software programs available and also have something professional and customizable.  Xplotter is a cross plot program that will read a CSV or LAS file directly and even allows adding in multiple LAS files to compare measurements in the same intervals.  This software is not yet ready for commercialization, but I am thrilled with how it is coming along.  Here are some of the recent updates and fun examples.

1)  Multi-well cross plotting & limit data to interval of interest

Some of the existing geologic software packages that include petrophysical packages still can't perform multi-well cross plotting.  This is vital when making a petrophysical model across a basin.  In this example I've pulled in three wells and have limited their data to the tops I picked for the Wolfcamp A.

2)  Fun with color palettes

I never meant to be an interior designer.  My clothes are very plain and I can't see the differences in shades of yellow paint.  But my color palettes for logging measurements is getting pretty complex and awesome.  Here are some fun examples.

Gamma Ray Uranium vs. Total Gamma Ray - colored by volume of calcite

Neutron vs. Bulk Density - colored by volume of calcite

Bulk Density vs. Neutron - colored by clay volume

UMAA vs. RHOMA - colored by clay volume

I call that last color palette "Coffee is good for Scientists".  Of course, I added some lines, text and title boxes outside of Xplotter.  I've worked out the code to be able to add comments to plots, move them around and just need to implement.

3)  Log/log & semilog

A while back I put in logarithmic capabilities.  I think that instead of writing a completely separate program for decline analysis, I will just include the calculations into Xplotter for decline and EUR calculations.  In the example below I am using public data from the Texas Railroad commision and looking at when different wells came online in the same section.I added the yellow and green boxes and text outside of Xplotter.

Thanks for reading!


Saturday, August 20, 2016

OCGS Talk - August 31st - Permian Basin Value Model


August 31, 2016

SPEAKER: Jon Reynolds,
Glacier Geosciences, LLC

“Permian Basin Reservoir Characterization:
Generating a Value Model with
Petrophysics, Geosteering and Production”

10 NW 6th Street

WEDNESDAY August 31, 2016
Social Hour 4:30 pm – 5:30pm
Presentation 5:30 pm – 6:30 pm

Reservations are appreciated by Monday August 29th, 2016

The oil and gas industry is optimistic about 2017. In order to fully prepare for potential acquisitions a good basis of comparison is nice to have in your back pocket. The Permian Basin has a wealth of public data for Midland and Delaware Basin to build a value model to compare against potential deals within the basins and for comparison against other basins. The data also covers an important time period in the development of shale oil that can be used as a teaching tool. In this talk we will answer technical questions such as:

“How much does lithology matter when you drill your horizontal in the Permian Basin?”
“Is there enough data in the Permian to build a multi-mineral petrophysical model without core data?”
“What data is available for free?”
“What would I need to purchase to infill and map the whole basin?”

For example, in the University of Texas Lands database:
     1) 29 gigs of LAS Files
     2) 10,000+ LAS (1,900 with triple combo)
     3) 4,200+ wells
     4) Not including the thousands of rasters

This talk will cover:
     1) Using the available public data to build a multi-mineral petrophysics model without core data for porosity, saturation and identify flow units
     2) Determine which intervals of the different formations were targeted using directional surveys and gamma ray logs in order to group like wells for production analysis
     3) Analyze production, petrophysics, geomechanics and stratigraphy to
optimize target zone selection

Bio: Jon Reynolds

During the last ten years Jon has worked for American Energy Partners,
Chesapeake Energy, Fronterra Geosciences and Baker Hughes. Currently he is an
independent Petrophysicist and formed his own company, Glacier Geosciences.
His background includes working unconventional oil and gas shale plays across
the United States, Argentina, Mexico and Australia. These include but are not
limited to: Wolfcamp, Bone Springs, Spraberry, Point Pleasant, Marcellus,
Haynesville, Woodford, Vaca Muerta, Bakken, Eagle Ford, Buda, Velkerri, Kyalla,
Barney Creek, Lawn Hill, and Pimienta. This includes full scale basin wide
reservoir characterization of mineralogy, porosity, organic maturation, pressure,
volumetrics and reserves. He has developed techniques to handle large data sets
of tens of thousands of wells at a time to the small scale, high resolution
stratigraphic modeling.


Drinks will be provided prior to the presentation.
Reservation is not required for the open house and presentation. An accurate
headcount will ensure a more enjoyable social hour. Thank you for your
Please RSVP to
Name: ________________________________ Company: ____________________________