Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Gold/Mining/Energy : Gran Tierra Energy (GTE) -- Ignore unavailable to you. Want to Upgrade?

To: KaiserSosze who wrote (93)	6/12/2008 7:52:14 PM
From: architect*	Read Replies (1) \| Respond to of 161

Costayaco -4 preliminary results have not yet been released to the press. C-4 was also cored, which extended the drilling time considerably, the test results of core samples will provide in-depth geological and technical data on the reservoirs, in addtion to the typical logging and DST (flow testing). a couple of geologic notes on well bore coring thanks to JohhnyFocker from Investor Village. "I thought I might add a few points from a geology perspective. Coring is becoming a rarer operation. It is definitely not common in most areas. Coring does provide invaluable info for geoscientists though. The drill bits grind up the formations and the samples that wellsite geologists get are actually small drill cuttings (analogous to coarse sawdust when a piece of wood is drilled). Most drill cutting samples are caught over a 5-meter interval. The drill cuttings are well-mixed by time they are caught and examined so it is an inexact puzzle-making science to plot those mixed up cuttings for each 5-meter interval as drilling continues. Cores on the other hand are the absolute cat's meow. You get to examine up to 18 meters continuous (sometimes more) of formation that is completely intact. This intact nature of the core sample is invaluable to geoscientists for a number of reasons. The core will be examined for individual rock layers and (just as important) the contacts between these layers. Numerour physical features will be evident in core that cannot be seen in sample (intact fossils, grain size changes, bedding features and contacts). All these features are used to put together geological models that, when used with seismic and geophysical logs in the area, can predict sweet spots in the reservoir, potenail lateral continuity of these sweet spots, etc. I have not seen an instance where a company will hold up a NR on a well to await for core test results. but who knows? Often those results are available before drilling ops are completed. The cores are physically examined by the wellsite geologist on location immediately after they are retrieved from the hole. This only takes an hour or two. Then, right away, they are hotshotted to a lab either by vehicle or plane. As I say, it's common to have the types of data that jw speaks of even before the well is logged. (ASIDE: Going back to drill cuttings vs cores. The sawdust analogy can apply here too. Cut a tree down and give someone the sawdust to evaluate. It can be tough. Bring them to the stump you cut and the tree laying down beside ti. They can now tell you the tree type, health, age, even good vs draught years.. That;s what coring does and then some.)