shareholdersunite.com

Opportunities in smallcaps

shareholdersunite.com header image 2

What are the odds of drilling a dry hole at Triceratops-2?

HomeForumsInterOil ForumWhat are the odds of drilling a dry hole at Triceratops-2?

This topic has 8 voices, contains 30 replies, and was last updated by  petrengr1 72 days ago.

Viewing 25 posts - 1 through 25 (of 31 total)
Author Posts
Author Posts
January 27, 2012 at 9:22 pm #6942

petrengr1

This question comes along every time we drill and you probably already know what my answer to that question is but let me make a short story of a one word answer.

Back in August of 2009 someone asked a similar question about what to expect at Antelope-2. My answer may be found at: http://messages.finance.yahoo.com/Business_%26_Finance/Investments/Stocks_%28A_to_Z%29/Stocks_I/threadview?bn=26290&tid=115901&mid=115998

I guess my first thoughts about Triceratops-2 (Formerly Bwata-2) were mentioned in Part II of this string back about one year ago: http://messages.finance.yahoo.com/Stocks_%28A_to_Z%29/Stocks_I/threadview?m=tm&bn=26290&tid=242164&mid=242164&tof=-1&rt=1&frt=2&off=1

So, what has happened in the last year to influence my thinking about Triceratops-2?
1. They have acquired more seismic data and concluded that Triceratops/Bwata is one large structure.
http://www.interoil.com/presentation/2011-08-16_Enercom_Final.pdf charts 24 and 25.
2. Both the IOC and Knowledge Reservoir (3rd party) Geo-scientists have evaluated the data and, based on preliminary data, Knowledge Reservoir has estimated that in the “most likely case” the reservoir would contain 4.594 TCF of gas in place. Chart 25
3. Chart 26 suggests that Triceratops-2 (Formerly Bwata-2) is expected to be 1,500 feet higher than
Bwata-1which had a 512 foot gas column, meaning that Triceratops-2 is expected to have a 2012 foot gas column.

4. Chart 26 also suggests that “the seismic reflection character at Bwata is analogous to the Antelope reefal build up”.

5. Since the above estimate of gas was made by Knowledge Reservoir the Phase 3 seismic has been completed and evaluated. http://www.interoil.com/presentation/2011-11-15_3Q11_Results_Presentation_Final.pdf charts 13, 14 and 15. On the conference call Phil and David Holland said the new data indicated the field was bigger and broader than previously thought. This would lead one to think the Knowledge Reservoir estimate is low since it was made prior to the acquisition latest seismic data.

My latest guess about the odds of making a dry hole at Triceratops-2 is once again zero. Of course I must remind you all of my guesstimates come from data provided by IOC. We will be drilling on a large “hump” thought to be a reef, 1500 feet higher than a known gas well. So it is not too big of a stretch to expect to make a gas well. Even if there is no reef (highly unlikely I think) then we should have +/- 2000 feet of fractured limestone which would contain gas. Even with that remote possibility we would have a very high volume gas well but the reserves would have to be reduced. I do not expect this last described worst-case scenario.

Yes, we did drill a dry hole at Triceratops-1, but I believe with the additional seismic data and the much higher structural location we will make a good gas well. The likelihood of drilling through 2000+ feet of reef or limestone without finding some porous rock or fractures seems quite remote to me.

I hope this make you sleep well this weekend.

January 27, 2012 at 10:01 pm #6943

admin

Thanks Pet, much appreciated. I was sort of thinking not finding a reef would be almost as bad as a dry hole, as from memory the low estimate from KR is something in the range of 1-2Tcf and although I realize there are numerous companies who would kill for that, it could be a bit disappointing for IOC, especially with the talks of reducing IOC’s stake in E/A to 10%. It would basically be a large Elk and not enough to feed a new LNG venture. Or perhaps we’ve just been too spoiled with these whoppers at Antelope.

But if you think it’s highly unlikely, that’s quite encouraging

January 27, 2012 at 10:33 pm #6944

Tree

I’ll drink to another 4-5Ts of temporarily stranded gas!

If you are sleeping well with T-2′s chances of success, so am I.
Thanks Pet.

January 27, 2012 at 10:57 pm #6945

Spartina

Thanks Pet- that is like music to my ears coming from you. Forgive me for I know I have brought up this point before, but I still believe that this point is more significant than folks are giving it credit for and I would love to get your take on this Pet. Triceratops is significant because when we hit there it will prove that E/A wasn’t just a one hit wonder. This now speaks to the higher probability of ALL THE OTHER STRUCTURES ON THE ROLODEX being valuable, and containing more T’s of gas. The possibility of Arun like numbers then seems VERY probable. Gentlemen this is the stuff that dreams are made of… sleep well? Are you kidding? I am too damned excited to sleep well!

January 28, 2012 at 8:48 pm #6952

maui4marko

They should snap up Laurus Energy next door to the SE with the $$$ from deals. Extend the string of pearls from the twin peaks all the way down to the valley.

January 28, 2012 at 10:00 pm #6953

Palmtok

Pet, it is great having your analysis to rely on. Reading those older posts is as close to crystal ball technology that we can have. Even your comments on the road that IOC has been building are spot on. It’s interesting also your comments on FID as far as Mitsui and EWC. That really reminds of what the interplay is between the different partners and how valuable having Mitsui involved is. They have had to do an enormous amount of adapting the plans as things have changed. They really are the main cog in this project when you think about it.

Thanks again for all your analysis over the years. Having these posts to read and re-read is huge, and a lot easier when we don’t have the Yahoo noise to filter out.

January 30, 2012 at 1:21 pm #6973

sageo

Pet-Am new to board. First,thanks for your skillful insight. Second,could you comment any further on small anticline b/low carbonate base? Third, how far down do you think we will go with surface casing?(also casing diameter) Many thanks.

January 30, 2012 at 3:56 pm #6979

petrengr1

Sageo- These are some of the same questions I would like to have the answer to so I can not be of much help.
On the PR where they announce the spudding of Triceratops-2 they said they would “3) in the event of success,
complete the well as a future production well.”
If they are planning to complete the well as a high volume producer they may start off with larger casing so they can end up with 7″ tubing for the producer. Just a guess of course.
At Antelope-2 they set 18 5/8″ surface pipe at 810 feet and intermediate 13 3/8″ at 3609 feet with 9 5/8″ at the top of the carbonate.

At Triceratops-1 they set 13 3/8″ at 381 feet and 9 5/8″ at 2,539 feet.
My guess is they will follow the casing sizes they used at Antelope. Since the well will be a bit more shallow I would expect to see the casing strings set a little more shallow than Antelope. The 13 3/8″ may be set somewhere near the sandstone they are expecting at +/-950 meters (3,117 feet).

If you are new to the board you must hear my disclaimer that I am not a geophysicist. So you must take anything I say about seismic pictures with a grain of salt. Regarding my comment about the little anticline below Triceratops-2 that is just something that looks interesting to my untrained eye. There has been some talk about finding the Pale/Subu sandstones below the Limestone section but we have never drilled deep enough to test that theory. The theory may only apply in areas East and Southeast of Antelope. Still it would be interesting to know what real geophysicist would say about the cross section http://www.interoil.com/presentation/2011-11-15_3Q11_Results_Presentation_Final.pdf slide 15.
I don’t think IOC plans to drill deep enough to test this section at Triceratops-2.
IOC had previously hoped to find oil in the Pale/Subu sandstones in the area North, East and Southeast of Antelope.

January 30, 2012 at 4:51 pm #6980

sageo

Pet-Thanks for your enlightenment. I wish that ioc would consider going that 1500 ft.(?) deeper.If that fm. contained oil, we could “shout it out”.(No?) Phil then could claim “hero” status.

January 30, 2012 at 5:56 pm #6981

admin

Welcome aboard Sageo!

January 31, 2012 at 9:44 am #6994

sageo

Admin-Thank you. Good luck to all you guys(and gals).I admire your tenacity.

February 1, 2012 at 9:41 pm #7017

petrengr1

I have been playing with IOC’s numbers again. On the PR http://www.interoil.com/newsrelease/2012-01-17_T2_Spud_Final.pdf they say they plan to drill Triceratops-2 through the “entire reservoir interval” to a total depth of 7579 feet (2310 meters).

On http://www.interoil.com/presentation/2011-11-15_3Q11_Results_Presentation_Final.pdf chart 15 they say they expect the top of the reservoir to be at 1320 meters (+/- 200)

Reservoir interval= 2310 – 1320 = 990 meters or 3248 feet.

The PR also says they expect to hit the top of the reservoir 1500 feet higher than the gas/water contact found at Bwata-1 so, based on that they are suggesting they expect a gross gas filled reservoir interval of 1500 feet. So less than half of the drilled reservoir interval is expected to be filled with gas.

Chart 15 is a cross section of the red line shown on the Phase 3 map on Chart14. So the reef falls off fairly quickly to the north. The highest part of the reservoir is along the fault to the south and west of Triceratops-2 is being drilled.

February 16, 2012 at 6:06 pm #7679

sageo

Pet-Again, thanks for all your time-consuming great work. I blew up to 200% page 14 concerning Tri/Bat field. As best I could tell from the contour lines it looks like the eastward extension might give us a drill site that would tag the reef(or lms)at a slightly lower elev.,but could still yield a significant gas column.Your thoughts please.

February 16, 2012 at 8:24 pm #7680

petrengr1

Sageo- Yes there is plenty of room for another location east of T-2. Southeast would be better. Look at the scale at the bottom of the map and you can get an idea how big the area shown is. With 62 square miles of closure there is plenty of room for locations. I tried to describe this map in my Masterpiece on Yazoo back of Nov. 16, 2011 http://messages.finance.yahoo.com/Business_%26_Finance/Investments/Stocks_%28A_to_Z%29/Stocks_I/threadview?bn=26290&tid=304359&mid=304359 If you look at the color code scale on the left side of the map on http://www.interoil.com/presentation/2011-11-15_3Q11_Results_Presentation_Final.pdf chart 14 with some effort you can see that the dark blue starts at -1500 meters sub sea. The map is drawn with 50 meter contour intervals and is based on sub sea depths. If you look at chart 15 you will see that Knowledge Reservoir believes the gas/water contact is at -1500 meters sub sea for the Most Likely Case. Back to the map on chart 14 you will see that the dark blue starts at the -1500 meter sub sea contour line. So, everything on the map above the dark blue should contain gas. T-2 is on the -850 meter contour line. If the map turns out to be correct we should have (1500-850) 650 meters (2133 feet) of gas column at T-2. Latest word from IOC is they expect 1500 feet. I think they are just hedging their bets a little in case it comes in lower than expected.

I can see a string of locations right down the -1000 meter sub sea contour line 1 km apart. According to this map, wells drilled on the -1000 meter sub sea contour line would be expected to have a gas column of 500 meter (1641 feet) .I would also put one on the high spot north northwest of T-2 which shows a -900 meter contour which would give it a 600 meter (1969 feet) gas column. There are many locations that could be drilled with a 1600 foot gas column or more.

After thinking that over we can consider what is west and northwest of this map where the green and yellow goes off the map. Looks like room for more locations to the west and northwest of what is shown on this map.

Now the good news. I just noticed that all of the above comments are based on the Phase 2 Map. Now compare the Phase 2 map with the Phase 3 map and you will see that there is much less dark blue and purple on the map. Remember the dark blue and purple would be below the gas/water contact so there is much more gas filled rock on the Phase 3 map.

Trace out the contour lines on the Phase 3 map and you will see that the location for T-2 is on the 750 meter contour line instead of the -850 meter contour line mentioned above for the Phase 2 Map. So according to the Phase 3 map we should expect to see a gas column of (1500-750) 750 meters or 2461 feet. And again plenty of room to drill on the -1000 meter sub sea contour line or higher.

And yes I do now see the location you apparently see which is a good 8.5 km East of the T-2 location. There appears to be another drillable reef on the east side of the Phase 3 map that was not on the Phase 2 map. That was a very good observation on your part Mr. Sageo.

Here is a hint for everyone looking at this Chart 14 map. Put your computer on 100% and the scale at the bottom works perfectly at 1 centimeter= 1 km. It is 10 km from T-2 to the western edge of the map (field continues West) and it is 8.5 km East to the new reef noticed by Sageo. This thing is looking “bigger and broader”.

Have a good evening!!!

February 16, 2012 at 10:51 pm #7684

Palmtok

Pet and Sageo, thanks for this exchange. To read that this thing more than living up to its name sure takes away some of the frustrations and ups and downs we’ve had over the last year. I know Pet that you’ve said the comments we’ve gotten have confirmed your suspicion that management purposely cut off the Phase 3 edges until they can drill T2 and get more seismic work done on this formation. That’s more than exciting. I know it’s always dangerous to make the comparisons to Arun (and GLJ’s Arun comment at Ant I believe was aimed at its potential productivity % and not the size of that formation), but some of that may be appropriate. You’ve already mentioned that Arun is a much deeper formation, but with what you know and see, how large would Tricertops need to be horizontally in km to start approaching even half the volume that Arun is? With this formation being less thick than Arun it seems it would be a great candidate for directional drilling. Any feedback is more than appreciated.

February 16, 2012 at 10:57 pm #7685

maui4marko

pet & sageo nice eyes and great analysis as always pet.

Q: could any of the string of locations and/or high spots support multiple wells (perhaps in diff directions) from a single pad? Using lessons learned from E/A could they “fill the gaps” to obtain max Ts with minimum drill loc’s (with respect to GCA req’s)?

February 16, 2012 at 10:59 pm #7686

maui4marko

palmreader – I see you have the same ? as I do re: directional… you been tappin’ into the VO again?!?

February 16, 2012 at 11:24 pm #7687

Palmtok

Mauimindmeld, you did it again. Projected your thoughts across the pond through the use of the foil cap you invented. It really does work; I thought you were kidding. In that case I think you CAN make a living selling those things on the web. So either we are both going to look really smart here or you are going to look dumb because I’ll blame my ideas on your foil beanie.

February 17, 2012 at 9:58 am #7696

sageo

Pet,Palm,et.al. Gentlemen-thanks for those kind words about my input.If,and that’s IF,we wind up in the future with 7-9 wells at Tri/Bat and build another CSP(wet NG),could we use the ROW from E/A to the gulf or would we consider selling the gas to XOM? Their pipeline might be fairly close to our very large res. at T/B.(I know,I’m thinking out loud again!) Also, thanks Supa for your fine commentary this AM.

February 17, 2012 at 10:37 am #7697

Palmtok

Sageo, I think that one of several battles being waged right now in the bidding for IOC. We have E/A with Mitsui pretty well entrenched and JAPEX very familiar with the formation and drilling results. Must feel pretty good about things with the “announcement” of the JKM consortium. And of course they most likely feel very good about T/B and what they’ve seen with the seismics. On most of their presentations IOC shows gathering lines that bring the wet gas to the area of EA (See slide 15 of the January 2012 IPAA Presentation). The lines from T/B show a couple of possible routes, but end up at the CSPs at E/A. So my guess is that JKM is also assuming they get T/B. Pet has also mentioned (I believe) that there could be the possibility of CSPs up at T/B depending on what’s found there.

As you mention XOM/OSH are scouring for more NG to feed their additional trains. OSH is finding some small pools, but nothing like E/A or T/B. So I would guess for assurance purposes they are very interested in the whole pie; whether it’s to feed their existing plant being built or to build in the Gulf to appease Kavo and take any excess to their plant. They also should be very interested in PL 236 as that gas could be fed most easily to their planned LNG plant.

Then we have Shell who would love to have it all also, but how they would develop the fields is anyone’s guess, and what they are willing to pay is even more of a guess.

I would think these are the three most interested groups, and it’s not to say that even if XOM does not get the whole things that they wouldn’t still want to buy some conditioned or wet gas. That could also be a way to keep Shell at bay; have JKM be the SD partner and work out a deal with XOM for feedstock. Would be hard for PNG to force Shell if a deal like this were to be proposed.

February 17, 2012 at 11:31 am #7704

petrengr1

Palm/Maui- Thanks for your input. I will give you my opinion on some of your comments.

1. “GLJ’s Arun comment at Ant I believe was aimed at its potential productivity % and not the size of that formation”

Yes the analogy of Antelope being another Arun has been very much over played. About all they have in common is they are both thick limestone reefs. Here is some information from one of my old posts:
Some history of Arun Field
Discovery well had 1100 feet of reefal limestone.(Antelope-1 had around 2,300 ft.)
Production began in 1977.
Average reservoir depth 10,050 feet.
Original reservoir pressure was 7100 psi in 1977.
After producing for 12 years the reservoir pressure was still 4330 psi in 1989.
The original reserve estimate in 1975 was 16.1 TCF.
Field size 23,240 acres. (2+ times the size of Antelope but less that half as thick. The reason the recoverable reserves are some 2x higher than Antelope is the much higher original reservoir pressure. The original reservoir pressure at Antelope is about 3660 psi depending of the depth the pressure is measured. So original pressure at Arun was almost twice the pressure at Antelope.)
Arun Field has now been producing for 34 years.

The largest number I see here for possible recoverable gas from Arun field is 20 TCF.

2. “how large would Triceratops need to be horizontally in km to start approaching even half the volume that Arun is?”

It is already large enough to contain more than half the volume of Arun if we find a significant amount of reefal reservoir rock in all of the high spots that look like possible reefs. Arun field was 23,240 acres. If Triceratops is 62 square miles that is 39,680 acres. The discovery well at Arun had 1100 feet of reefal limestone. I think Triceratops may have a gas column height in excess of 2,000 feet. Arun was more than twice as deep as Triceratops so the higher pressure at Arun means an equal pore space would contain about 2.4 times as much gas at Arun as compared to Triceratops and about 1.9 times as much as Antelope. The original reservoir pressure at Arun was about 7,100 psi. I expect the pressure at Triceratops to be about 3,000 psi.

3. “With this formation being less thick than Arun it seems it would be a great candidate for directional drilling.”

Actually I think the formation at Triceratops will be thicker than Arun. As far as directional drilling is concerned, I believe we will see multiple wells from individual location pads. If we find high porosity/permeability reefal limestone the reservoir can probably be depleted without drilling the wells too close together. I believe the main reason for using directional drilling will be to save money on rig moves (helicopter), location preparation, roads and pipeline rights-of-way. The Triceratops Field area is very rough terrain (much worse than Antelope) and it will be expensive to build roads, locations and pipeline rights-of-way in this area. If we minimize the number of locations we will minimize the other requirements.

The more shallow depth of the Triceratops Field limits the “reach” of directional wells (as compared to Arun for example) unless they do go horizontal. I think they could develop an area up to 1 km in all directions from a single location. So location pads could be 3+ km apart without any problems. I think we will also likely see directional wells at Antelope.

4. “could any of the string of locations and/or high spots support multiple wells (perhaps in diff directions) from a single pad?”

I believe this is answered in No. 3 above.

5. Regarding the need for horizontal wells, I think this is misunderstood in some quarters.
Horizontal wells were originally used to increase the number of feet of “net” pay by drilling horizontally in a relatively thin pay zone or to get a much greater amount of pay zone open in low permeability reservoirs (shales, shaley sands, or shaley limestones). This allows the use of multi-zone frac treatments which allows for commercial production whereas a vertical well would produce uneconomical or less economical results.

In the case of very thick high permeability zones such as Antelope (and I hope Triceratops) horizontal wells are not required for the above described reasons.

At Antelope-2 I think IOC used the horizontal drilling for the following reasons:
a. They thought they had an oil column which they wanted to prove and test.
b. They wanted to show that the reservoir rock extended some distance from the vertical well.
c. They needed to pin down the gas/water contact if no oil zone was present.

Due to the higher expense and difficulty of horizontal drilling in this over pressured high permeability (loss of circulation) formation I would expect IOC to utilize directional drilling rather than horizontal drilling. Even with conventional vertical and directional drilling I think they will continue to have to use the pressure managed or mud cap drilling technique due to loss of circulation.

February 17, 2012 at 12:19 pm #7705

sageo

Maui,Pet-Aren’t we about ready to set some 13+ inch casing at T2? Also,OT,would Shell be interested in acquiring ppl just west of our ppl 237?

February 17, 2012 at 12:25 pm #7707

petrengr1

They should have already set and cemented the 13 3/8″ casing barring other problems.

February 17, 2012 at 3:44 pm #7722

maui4marko

Sageo – pet is more knowledgeable than I am wrt drilling progress, but assessing it purely from a project scheduling perspective, I previously estimated in the PalmJumeirah post the time range to set 13-3/8″ casing at ~3,100′ was at the earliest Feb 15th and the latest March 15th http://shareholdersunite.com/forums/topic/ipaa-presentation/#post-7087

So I agree with pet that if they didn’t run into any problems, they should have already started the 9-5/8″ casing or if issues arose then could be at most a few more weeks.

Looking forward to the next drilling update so we can revise the target dates. Goes without saying there is high interest in be how far they will have come by the mid- to late-March. Could be anywhere from completing the 13-3/8″ casing from the most pessimistic all the way to hitting TD at the most optimistic. Still necessarily quite a large range, until we get more clarity re: progress.

February 18, 2012 at 1:37 pm #7760

sageo

Pet et.al. commenters,thanks much.I tried to find the info on the 2009 Poroman seismic survey but my limited skills didn’t help me much.I do recall some talk about joint co-op between LNG corp and ioc. If one of you had time, would appreciate your input on this while we are waiting on T2 update. Tia.

Viewing 25 posts - 1 through 25 (of 31 total)

You must be logged in to reply to this topic.