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07-30-2013, 04:13 AM
(This post was last modified: 07-30-2013, 04:14 AM by petrengr1.)
How to develop large thick gas reservoirs with inhospitable terrain? ]
If you have a zone that is 4000 feet thick, like Triceratops, you could drill about nine wells from each drilling pad site. Maybe one vertical well and an high angle well about every 45 degrees of the compass. If we hit the top of the formation at an angle of about 24 degrees from horizontal and drill through the pay zone at that angle we would have a 10,000 foot pay zone in every well and the individual high permeability/porosity streaks would be 2.5 times as thick as the vertical section. Each pad site would be able to develop about 2 miles in every direction or about 16 square miles (41 sq km). A development plan like this minimizes the cost of locations, roads, flow lines/pipelines and rights of way.
Exxon seems to be using a plan somewhat like this at Hides and they have Nabors Rigs 702 and 703. Now if we could get Exxon as a partner we might end up with similar rigs and a similar plan for our large fields that have thick pay zones.
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Pet, got some goodies from trans which might be of interest to you:
http://ict.sopac.org/VirLib/TR0183.pdf
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'admin' pid='26318' datel Wrote:
Pet, got some goodies from trans which might be of interest to you:
http://ict.sopac.org/VirLib/TR0183.pdf
Admin - Thanks for this information. These geologists really know how to give you a head ache don’t they? I will probably never understand all of this but I take some comfort in knowing that the data was put together in 1995 which was before IOC came on the scene. As you know the Elk/Antelope discovery changed the geologists ideas (at least IOC geologists) of what we might expect in the
Gulf Province and maybe along the coast. Back in 1995 they had the drilling data and quite a bit of legacy seismic data but since then, in the last 15 - 20 years, we have obtained more drilling data, more seismic data and a lot more aerial gravity and magnetic data along with the geologic field surveys and core holes.
In the old days they drilled without sufficient seismic data and they were not very successful. Hopefully we have learned that lesson and we will do all of the necessary seismic work before drilling in the future. As a result I am hoping that we will be able to identify some traps and/or reefs along the coast even though they may be smaller than Elk/Antelope.
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Pet, it was Trans who asked me to pass this on, and interpretation of it is way above my pay grade. However, what I remember is that IOC geologist always believed in their geological model, the one with reefs but that it were others (e.g. Ross Smith Energy Consulting) who disagreed, but the latter had to waive something of a white flag after Antelope1 hit the top of the reef there.
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In the early days of IOC (late 1990's) there were some geological reports available that showed estimates of oil in many of our prospects. Thes were prepared by CISRO as I recall. At the AGM I asked Wayne if he was aware of these reports and he had seen them. I asked if I could get a copy of them as mine disappeared a long time ago. Wayne thought there were some copies in their offices hidden in old file boxes. I think Peteng would like to see these and he has enough prestige that if he requested them someone at IOC would dig them out. I recall that I added up the Original Oil IN Place totalled well over a BILLION
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Barrels of oil and made references to probable gas reserves as well. Has any other SHU member seen these reports? Would they have a copy ?
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Segments of these reports were published on yahoo. Swish now gone.The basic statements was all of the NG came form oil.Now wheres that oil??
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I really like plans to share the pad and site for wells in many directions. This is always a good idea, but especially so in rough terrain and with scarce roads, costly access methods, etc. PNG has them all. Such efficiencies could make the cost of IOC's future newfound NG even lower than IOC's present to date, which already sets the "how low can you go?" limbo standard.
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'strategyguy536' pid='26326' datel Wrote:I really like plans to share the pad and site for wells in many directions. This is always a good idea, but especially so in rough terrain and with scarce roads, costly access methods, etc. PNG has them all. Such efficiencies could make the cost of IOC's future newfound NG even lower than IOC's present to date, which already sets the "how low can you go?" limbo standard.
Strat-When I read Pet's post yesterday, I wanted to reflect on it for awhile .After re-reading it and doing some other research, I truly believe he has "hit the nail on the head"again. Your follow-up on his post was a good one; however,it did make me realize what a long process all this is going to result in. Patience is no longer a plain virtue....it is now become a "double" virtue !!! Good luck.
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PNG LNG from four wells
By Online Editor
12:39 pm GMT+12, 30/07/2013, Papua New Guinea
-Initial supply for the PNG LNG Project, which will have its first exports next year, will come from four major well pads (drills) in the Hides area of Hela.
Esso Highland Ltd (EHL) pipe and infrastructure manager Vincent Giorgi said these were Well Pad B, which has two wells, Well Pad C, Well Pad D, and Well Pad G, which are all in the vicinity of the Hides gas conditioning plant.
Giorgi, who is supervising an international team working around the clock to set up pipes along a 21km access road from the wells to Hides, said on site on Sunday it was a huge task but he was confident of getting everything ready in time for first LNG exports next year.
The access road is a hive of activity as EHL workers and contractors set up the pipes, well pads, and work on road access in the rugged and mountainous terrain.
Giorgi said the company was doing its best to cause as little environmental damage as possible.
“The feeder lines are 22-inch that comes from the well pads to the Hides gas conditioning plant,” Giorgi said.
“This line will import gas, condensate, water, impurities, everything.
“It gets process and gets separated, and you get condensate in an eight-inch and gas in a 32-inch that will flow on to Port Moresby for export.
“We’re using the well pad access road to also be our ride away pipeline alignment.
“We’ve been able to reduce any additional environmental footprints by using current project footprints.
“So we’re putting it (pipeline) on the road, actually, on the side of the road.
“It will connect into the process area (Hides).”
Giorgi said other environmental measures included turning quarries into drilling areas, a vehicle wash to prevent outside pests and diseases, and declaration of environmentally-pristine areas.
He said the 22-inch feeder lines in roadside trenches would be multi-purpose.
“Also in this trench is a high-voltage cable,” he said.
“The process will require power at the well pads, so that will carry high-voltage power into the facility.
“We will have a fibre optic cable as well.
“The fibre optic cable follows the pipeline all the way to Port Moresby.”.
Meanwhile, waste from onshore pipeline activities at the PNG LNG project continues to be processed at the waste management facilities, ExxonMobil environmental field advisor Isaac Jipsy says.
He said this during a recent quarterly media workshop to provide updates on the PNG LNG Project.
Jipsy said: “The project is using the best possible practices available in such a way that it has little or no negative impact to the environment.
“There is always a way to save cost and we are using five methods of waste management – avoid, reduce, reuse, recycle and dispose”.
ExxonMobil also uses old tyres from the trucks at the Hides and pipeline areas as buffers near roadsides.
Jipsy said this is known as the eco-flex method where the interior of the tyre is removed to be used.
He also said that 60 tonnes of biosolids, which include food waste, were reused as top soil at a land fill area to help bring back the vegetation and support recycling.
“These are some of the innovative ways of recycling and reusing of old products,” he added.
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