I am forever asking you guys for information, and this is no exception. Does anybody have the service manual for the MLS chart recorder that was made up until...
Pardon my lack of knowledge in this environment, but I am trying to understand the acquisition technology and report generation process involved with well...
Joe, Every logging tool manufacturer has a different acquisition method. The good news is that a common data file type called LAS or Log ASCII is commonly used...
Folks, I have two notes: 1) Concerning wireline log data in electronic format and LAS, the Kentucky Division of Oil and Gas, the regulatory agency for the...
Rick Bender over at DOG was asking me about digital well log formats a few months back. Now I know why. The problem I see with such a requirement is that some...
Syd, I have to agree about the potential quality of analog data, but the truth is that it is a difficult task to push a couple of millivolts over 5000 feet of...
I only meant pulse tools like a temperature log where you are not pushing small signals up the line. The temp log is a special case where tiny changes can be...
At the slow speed you move up and down the whole you can greatly improve the resolution of you digital reading using a V/f converter. The basic circuit ...
I know what you are saying about the temperature logs, Syd, I had to opportunity to work on one at one time and ran up against that digital resolution problem...
Syd is right, (kind of:) A Temp tool that converts temp to voltage to frequency is analog. Take a hypothetical case: It is possible to have, in a 5 count per...
Chuck, I follow your discussion about analog/voltage/frequency, all done in the tool, which is the basis for most of the digital tools I use. So is your ...
Art, You are right. That's the point. Digital (just 12 bits) has resolution that is MORE than satisfactory. The BONUS is that digital retains better...
Gordon, the V/F converter circuit is actually the basis of many pulse type tools (temperature, caliper, etc.). ... From: "Gordon Couger" <gcouger@...> ...
All of what you say is true. However a platinum RTD mounted in a well will respond fast enuff and with sufficient resolution to make some pretty dern subtle...
The reason the resolution is infinite is that the analog rate meter integrates the pulse rate. Hence, one can think about the distance between the pulses as...
I got this email this morning. I have no expertise in this area; anybody have a suggestion for this guy? Early next year Hot Rock GmbH will drill a 10,000...
Chuck, I think we must be talking about entirely different markets here. If we are talking about "Well log data in electronic format" we probably should...
Syd, Temperature logs are run pretty commonly with the tools I have worked on, most of the majors have offered this service for at least the last 15 years or...
Is he looking for a x-y caliper log on the well? Ray Ethridge ... From: Syd H. Levine To: wireline@yahoogroups.com Sent: Friday, July 04, 2003 4:16 PM Subject:...
No, I think he is after a determination of borehole deformation due to in situ stress. Coleen Barton at Stanford had done a lot of this using the acoustic...
Syd, I am curious about the stair-steps in the curve you mention. If a station reading takes place in time drive with a sample interval of one second - it is ...
Problem is that virtually all the independents are going to the Warrior computer system, and it definitely produces steps in the curve (or at least the last...
I don't know why there are stair steps, but there are. I would guess that for temp logs, 5 samples per foot ain't enuff for the real expert analysts like Mac...
Ray, Thanks for the information. My case was a hypothetical case to represent the issue of resolution. Not to represent the de-facto current state-of-the-art...
A borehole viewer will allow the determination of borehole breakouts which infer in situ stress. The best method for insitu stress determination that I am...
I guess I didn't ask the question about the RTD correctly, what physical package and mounting is used for the platinum RTD you are talking about? My fiasco...
Chuck, Yes, we do seem to get "off topic" here pretty easily. But as long as we have strayed so far already and you broght it up, the use of the mil spec...
Pat has the idea. Horizontal stress measurement is related to the question of horizontal permeability and horizontal fluid production and fracturing or proping...
Ray, The information I have on the platinum RTD says it's linear from -75 to 150 C with an error of less than .4 percent. That seems like a very good sensor. A...
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