6k filed- Flow Testing Begins

[Getitrt2]

Thanks, again, Pet! All this makes me wonder just how far WEST of A5 the formation extends toward the fault! I guess the resource engineers will need to make good use of (enhanced) seismic in that area, which I think IOC has a fair amount of west to the fault, right? A5 will also help them in their use of that seismic, right? Now I'm beginning to wonder whether A6 on the East side of the formation will turn out to be another positive or a negative. Any thoughts on that at this point?

The drilling data at Antelope-5 will of course help them in the better interpretation of the seismic data. The drilling data is the actual depth whereas the seismic data is interpreted depth. They have previously also been running a VSP log at the bottom of each well which gives them the true sonic travel time for that location and depth. I believe the western thrust fault cuts through the formation at a relatively shallow angle making it the western boundary of the reservoir. The fault will also be the bottom boundary of the reservoir in the area near the fault. Away from the fault the bottom boundary of the reservoir is the gas/water contact.

Will Antelope-6 come in higher than expected like Antelope-5 did? That is anyone guess. I think all of the wells except Antelope-4 have come in higher than expected. Antelope-4 came in about as expected. At Antelope-5 they said they had trouble telling the difference between the shale above the reservoir and the reservoir itself so it was difficult to pick the formation top. I think sometimes a high porosity gas filled limestone may have  slower than  expected travel time which may cause interpretation difficulties. I believe they wanted to drill Antelope-4 and Antelope-6 to prove that the formation did not dip more steeply than shown by the interpreted seismic data. Their map at http://tinyurl.com/n4tcq8g page 10 does not have the contour lines marked but they are 100 meter contours with the indicated gas/water contact at -2,214 meters sub sea depth. So according to the map Antelope-6 should come in about 100 meters higher than Antelope-4. That should give us about 1,300 feet of gas column at that location. I believe they are also trying to hit the high porosity limestone and high porosity dolomite. I think we will have a thicker section of dolomite and high porosity limestone at Antelope-6 than we did at Antelope-4. If you look at Map 3 of the GLJ report you will see where they interpreted the three reservoir types to be located. Of course the major part of the gas resources are located in the high porosity limestone/dolomite reef. So they will be trying to prove both that the reservoir is not more steeply dipping than expected but also that the high porosity limestone and  dolomite are present at the Antelope-6 location and by extrapolation at other locations indicated by seismic interpretation.

Very interesting, indeed, PET.  Thanks once again.

On the fault, forgive me, but are you talking about a shallow angle from the horizontal or from the vertical?

Less than 45 degrees from the horizontal. Of course I am guessing. But with these reverse thrust faults I think that is the case. The top block is pushed up and over the lower block.

I am no geologist, but it sounds like to me that a fault with a more shallow angle from the horizontal means more gas to the west?

[petrengr1]

Thanks, again, Pet! All this makes me wonder just how far WEST of A5 the formation extends toward the fault! I guess the resource engineers will need to make good use of (enhanced) seismic in that area, which I think IOC has a fair amount of west to the fault, right? A5 will also help them in their use of that seismic, right? Now I'm beginning to wonder whether A6 on the East side of the formation will turn out to be another positive or a negative. Any thoughts on that at this point?

The drilling data at Antelope-5 will of course help them in the better interpretation of the seismic data. The drilling data is the actual depth whereas the seismic data is interpreted depth. They have previously also been running a VSP log at the bottom of each well which gives them the true sonic travel time for that location and depth. I believe the western thrust fault cuts through the formation at a relatively shallow angle making it the western boundary of the reservoir. The fault will also be the bottom boundary of the reservoir in the area near the fault. Away from the fault the bottom boundary of the reservoir is the gas/water contact.

Will Antelope-6 come in higher than expected like Antelope-5 did? That is anyone guess. I think all of the wells except Antelope-4 have come in higher than expected. Antelope-4 came in about as expected. At Antelope-5 they said they had trouble telling the difference between the shale above the reservoir and the reservoir itself so it was difficult to pick the formation top. I think sometimes a high porosity gas filled limestone may have  slower than  expected travel time which may cause interpretation difficulties. I believe they wanted to drill Antelope-4 and Antelope-6 to prove that the formation did not dip more steeply than shown by the interpreted seismic data. Their map at http://tinyurl.com/n4tcq8g page 10 does not have the contour lines marked but they are 100 meter contours with the indicated gas/water contact at -2,214 meters sub sea depth. So according to the map Antelope-6 should come in about 100 meters higher than Antelope-4. That should give us about 1,300 feet of gas column at that location. I believe they are also trying to hit the high porosity limestone and high porosity dolomite. I think we will have a thicker section of dolomite and high porosity limestone at Antelope-6 than we did at Antelope-4. If you look at Map 3 of the GLJ report you will see where they interpreted the three reservoir types to be located. Of course the major part of the gas resources are located in the high porosity limestone/dolomite reef. So they will be trying to prove both that the reservoir is not more steeply dipping than expected but also that the high porosity limestone and  dolomite are present at the Antelope-6 location and by extrapolation at other locations indicated by seismic interpretation.

Very interesting, indeed, PET.  Thanks once again.

On the fault, forgive me, but are you talking about a shallow angle from the horizontal or from the vertical?

Less than 45 degrees from the horizontal. Of course I am guessing. But with these reverse thrust faults I think that is the case. The top block is pushed up and over the lower block.

I am no geologist, but it sounds like to me that a fault with a more shallow angle from the horizontal means more gas to the west?

Getit that is a kind of an odd question. I guess one answer would be “compared to what?” or as Sageo might say we will get what we get or it is what it is.

OK, since you asked I will try to answer. Looking at http://tinyurl.com/n4tcq8g page 10 we see a brown area west of the field on the “3D” map. This brown area is a fault plane coming out of the top of the reservoir. If you visualize this map in 3 dimensions you will see that the fault plane is at a considerable angle. The only place we can see the location of the fault in relation to the reservoir is at the top of the reservoir i.e. the eastern edge of the brown color or the boundary between brown color and the structure map.

Now if the fault was vertical at that point the full thickness of the reservoir from the reservoir top to the gas/water contact would extend all the way west to the fault. That would be the maximum amount of gas that could be contained to the west of Antelope-5. If the angle of the fault is at 45 degrees that maximum volume would be cut in half. So the more shallow the angle of the fault is the less gas  will be contained west of Antelope-5.

[sageo]

"Professor" Pet - Thanks for your "quality" explanation. My old prof at UT would have been proud to have had you in one of his classes ! Have a good one !

[Bevo]

Sageo,  Hook'em!

[sageo]

Sageo,  Hook'em!

 Bevo - Right on,my man !  Three of our "original little ones" chose Bevo,but several of the " new batch" think since Reveille (the pooch....for those who aren't 'Texicans' is a general, they decided to "try him on for size". Oh well, time will tell.....as with IOC. Ho,ho. HAGD !

[petrengr1]

"Professor" Pet - Thanks for your "quality" explanation. My old prof at UT would have been proud to have had you in one of his classes ! Have a good one !

Maybe he did have me in one of his classes.

[Brew Swillis]

Maybe he did have me in one of his classes.

If is was Dr. McBride then I too was in one of his classes.

[sageo]

Sorry ,guys. I wasn't ignoring you, just had to take care of a little (big family) business . Do either of you recall a Dr. Robert Folk ?  He was a rather unusual guy....but very knowledgable. [ My time with him.....middle to late fifties ]  I believe he retired from the teaching field in the late eighties.

[petrengr1]

Sorry ,guys. I wasn't ignoring you, just had to take care of a little (big family) business . Do either of you recall a Dr. Robert Folk ?  He was a rather unusual guy....but very knowledgable. [ My time with him.....middle to late fifties ]  I believe he retired from the teaching field in the late eighties.

I was there in the late fifties also but I don't remember Dr. Robert Folk. I was busy over in the Petroleum Engineering Department studying at the feet of Dr's. S. J. Pirson, Kermit Brown and a graduate student by the name of Paul J. Root. I think Paul was a professor after he got his PHD. He and I ran the Petroleum Engineering lab where we taught the boys how to do core analysis, gas measurement and how to make drilling mud. He was the Professor and I was his grader and helper.

[sageo]

Sorry ,guys. I wasn't ignoring you, just had to take care of a little (big family) business . Do either of you recall a Dr. Robert Folk ?  He was a rather unusual guy....but very knowledgable. [ My time with him.....middle to late fifties ]  I believe he retired from the teaching field in the late eighties.

I was there in the late fifties also but I don't remember Dr. Robert Folk. I was busy over in the Petroleum Engineering Department studying at the feet of Dr's. S. J. Pirson, Kermit Brown and a graduate student by the name of Paul J. Root. I think Paul was a professor after he got his PHD. He and I ran the Petroleum Engineering lab where we taught the boys how to do core analysis, gas measurement and how to make drilling mud. He was the Professor and I was his grader and helper.

Good Sunday am ,Pet . No wonder you are so valuable to our board members and our "cause" .Some of the geos with me (namely me) probably weren't 'sharp' enough to be over at the PE department with you,but that doesn't prevent me (and other good guys in our 'group' from appreciating your talents . Good health and many thanks to you for your very "educating" help !  sageo