deltic stock is going nuts i guess because they have such a huge
mineral interest in the brown dense area and the leasing companies
are still going full bore so i would conclude that the well is a smoker.
anyone else have any insight?
Tags:
"It would be a mistake to judge any facet of this completion design against those of other formations in other plays."
Well I hope they learned their lesson. Did they acidize it with Hcl?
Calcium Carbonate and Limestone are synonymous. The Eagleford is a shale formation, though it is quite calcarious - has a considerable amount of carbonates (limestone). Distinguishing between carbonates and shales (clay) can be very easy, or it can be very difficult and require a lot of guesswork. When a formation is composed of 50% shale and 50% Carbonates, many Geologist would describe it as a calcarious shale and many would describe it as an argillaceous limestone (argillaceous is from the Latin word for clay) and still others might call it a marl. If you gave the same sample to 100 different geologist, you would likely get 100 different descriptions for identical samples.
HCl is an important tool for distinguishing between shales and carbonates. When dropped onto a clean, uncontaminated cutting, the release of CO2 will be observed if carbonates are present. The more the sample fizzes the more calcarious it is. If the cutting can be completely broken down by the acid, then calcite was key to the formation's framework and you definitely have a Limestone. Then you can proceed to estimate the clay content by the amount of residue left behind to determine if the limestone is argillaceous or not. On the other hand, if the formation does not break down and the cutting remains whole, then the matrix is supported by clay and described as a shale. Again, there is a lot of guesswork here, which is not that bad when the same geologist consistently describes all samples in question. It is the compounded human error integrated at tour change and crew change that has really lead to a lot of Mud-Log inconsistencies.
The Haynesville Shale itself is considered by many to be a carbonate. Clastics such as sand, silt and, shale(clay) are all made of the same stuff, just different grain sizes - fairly simple. Deposition Rates are key to understanding their nature. Unlike clastics, carbonates and especially carbonate porosity can get very deep in quite a hurry and require high order differential equations to describe mathematically. A given carbonate can offer huge amounts of porosity, yet little or no permeability (or connectivity of that porosity).
Paul Hess is an expert in this arena and would be far better suited for describing the many complexities of carbonate porosity such as moldic formations, dolomites, inter-crystaline porosity, etc.
I hope that this helps a little... Please find the attachment, Carbonates are the reason that Saudis' Oil and Gas fields are so prolific...
New Permit/Horizontal Well:
44405 03 027 11808 Brine Supply Well 75 Village TVD: 8080' Smackover Lime
Albemarle Corporation SHL: 1871' FSL & 252' FWL Columbia MD: 12035'
P.O. Box 729 PBHL: 724' FSL & 600' FWL
Magnolia, AR 71754 21-17S-19W
Savanna Latitude: N 33.24046605º
2/21/2011 Longitude: W -93.08745477º
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