Reef Detective Work

[petrengr1]

A little reef detective work. Look at http://www.interoil.com/faq/Elk_Antelope..._FINAL.PDF page 49. (Note I believe this map has the names of PPL237 and PPL238 transposed) I think some of these onshore reefs are where the reefs actually outcrop at the surface. Of course a reef outcropping at the surface is no good for a reservoir but what it might tell us is where we should look for those reefs that are buried deep enough to have reservoir potential. Note that the offshore reefs Pandora, Pasca, Uramu and the reef shown North of Bwata are all aligned with the Bwata complex as well as T-Rex and Seismosaurus, Allosaurus and Brontosaurus.

Now look at the Map at http://www.igcworld.com/PDF/Basin_Discovery.pdf . Note that the barrier reef shown on page 49 above appears to agree with this map regarding the outcropping of the Dari carbonate west of out PPL 237 (shaded in purple). This what IOC calls the Puri Limestone. Read the first paragraph below the map. Note that they say this carbonate is only prospective west of the outcropping where the carbonate is buried. That would be where the shallow Kuru gas field is and where the above mentioned deeper prospects T-Rex, Seismosaurus, Allosaurus and Brontosaurus are located.

Now the string of pearls swings around the outcropping at the northwest corner of PPL238 (marked on the map as PPL237) and heads south-southeast to Antelope reef and to the next outcropping shown on the southeast boundary of PPL238 (PPL237 on the page 49 map). Now look at http://www.interoil.com/presentation/201...tation.pdf chart 24. The yellow spots are outcroppings of Miocene limestone. See the Saw Mountain outcropping near Tuna. The outcroppings on this map to the northwest and west seem to agree with the other maps. The string of pearls then follows the coast line down to Tuna, Wahoo, Mako, Mackeral and several others if I am not wrong. Of course we must not forget those pearls in PRL 15 and all of the others between Antelope and Tuna i.e. Big Horn, Wolverine, Zebra and maybe others. I think all of the leads along the coast line in PPL236 are prospective for reefs. Whale may be too shallow for a reef prospect. Whale was originally a Pale/Subu prospect. Remember as you move to the East toward the Mountains the reefs become more shallow or outcrop. Note that the reef outcrops on the West, North and East. The buried reefs are in between these outcroppings.

[Palm]

Pet, not sure how you remember/find all of these things, but this is very fascinating. Bwata/Triceratops sure seems to line right up with E/A and then like you say, all the way down the coast. Thanks for spending the time.

Forgot we had a Zebra in our licensed area. Makes more sense of OPeration Zebra now.

[efi426hemi]

Hey Palm, it is quite clear actually how Pet finds and comes up with all this stuff. He is the Pet detective and discovering clues and stopping short crime is what he does best. I even heard that they might be doing a movie about him.

imho,
hemi

[oilmd9]

Marl noted on new presentation

Marl
From Wikipedia, the free encyclopedia
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For other uses see Marl (disambiguation).
For the red algal growth form, see Maerl.
Exposure of marl from the Matmor Formation (Jurassic) of southern Israel.
Scala dei Turchi coastal marl formation, southern Sicily.

Marl or marlstone is a calcium carbonate or lime-rich mud or mudstone which contains variable amounts of clays and silt. The dominant carbonate mineral in most marls is calcite, but other carbonate minerals such as aragonite, dolomite, and siderite may be present. Marl was originally an old term loosely applied to a variety of materials, most of which occur as loose, earthy deposits consisting chiefly of an intimate mixture of clay and calcium carbonate, formed under freshwater conditions; specifically an earthy substance containing 35-65% clay and 65-35% carbonate.[1] It also describes a habit of coralline red alga.[2] The term is today often used to describe indurated marine deposits and lacustrine (lake) sediments which more accurately should be named marlstone. Marlstone is an indurated rock of about the same composition as marl, more correctly called an earthy or impure argillaceous limestone. It has a blocky subconchoidal fracture, and is less fissile than shale. The term marl is widely used in English-language geology, while the terms Mergel and Seekreide (German for "lake chalk") are used in European references.
Scheme of the transitional lithotypes from mud (or mudstone) to lime (or limestone), illustrating the definition of marl (marlstone) as a mix of calcium carbonate and clay.

The lower stratigraphic units of the chalk cliffs of Dover consist of a sequence of glauconitic marls followed by rhythmically-banded limestone and marl layers. Upper Cretaceous cyclic sequences in Germany and marl–opal-rich Tortonian-Messinian strata in the Sorbas basin related to multiple sea drawdown have been correlated with Milankovitch orbital forcing.[3]

Marl as lacustrine sediment is common in post-glacial lake bed sediments, often found underlying peat bogs. It has been utilized as a soil conditioner and acid soil neutralizing agent.

[oilmd9]

Background gas with C1-C5. Sounds like we may be close.

[Justin94360]

Oilmd, where are you getting this from?
Thanks for info.

[oilmd9]

The presentation is posted on shareholders unite

[Justin94360]

Thanks, didn't see them - too busy checking IOC website. Should have known we would see it here first.

[Palm]

Some other things to note. On the new presentation Slide 11 which is the Gulf LNG Development Map, there are a couple of differences; Pet usually is a big help on why these changes might be there:
1. Condensate Stripping Facilities; the last presentation showed "12-14” Infield gas gathering pipelines", the new states, "8-14" Infield gas gathering pipelines"
2. Condensate Pipeline- New presentation adds, "120km buried 36" dry gas pipeline from CSP to liquification plants at Gulf and a 12-20" pipeline to floating LNG at jetty export terminal facilities" to the Upstream from Midstream; interesting
3. New presentation simply states "Liquification Plants of 8mtpa capacity with potential for expansion." Prior mentioned both land based and FLNG.

[Palm]

Now estimating top of limestone at 4,070 feet; last presentation mentioned 4,330. That's a nice change!