Earthquake in jakarta
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"Earthquakes of 7.5 and over happen approximately 18 times a year," said John Bellini of the USGS, "
I didn't know there were that many big ones every year... that is kinda scary!!!0 -
Somebody (an aussie) told me the problem is that when they pump the oil up ,it creates a cavity and that inbalance being equalised by the pressure of the ocean...
Mmmaybe [?]0 -
quote:Originally posted by Talented
Somebody (an aussie) told me the problem is that when they pump the oil up ,it creates a cavity and that inbalance being equalised by the pressure of the ocean...
Mmmaybe [?]
WELL NO, IT IS NOT A CAVITY GENERATED QUAKE!! We do not retreive oil from a depth of 180 miles below surface. Further, a simple cavity collapse would NEVER generate anything on the order of a 7.5 magnitude quake. That would be a tectonic quake from plate movement.0 -
Possibly coz no quakes in the Mexican Gulf i presume ?
But tectonic plate areas might be more sensitive to pressure changes
in oilfields...possibly.
No oilfields over here but we had quite a strong quake here last winter originating from the miningcompany filling up a open minehole. Causing pressurechanges in the ground...and more quakes is expected while the ground itselfe adjusting to the new weight of the fillingmaterial.
Well its two things to considere.1.The bottom of the oilfield expanding upwards coz of the oil being pumped up.And maybe implosions of cavitys shocking sensitive tectonic areas.0 -
quote:Originally posted by Talented
Somebody (an aussie) told me the problem is that when they pump the oil up ,it creates a cavity and that inbalance being equalised by the pressure of the ocean...
Mmmaybe [?]
I don't buy that for a second.0 -
[8D] Here we go again i guesse.
Havent read bout boomerangs in years untill i did after my first post on this subject(u know just surfing round the net)...and then Mr boomerang shows up ...Funny coincidence i think.
It's either the "X"man factor or i posses psyforce abilitys...Cant really make up my mind with explanation makes the most sence though. [:)][;)]
But i see the implications if the Indonesians would start believing the oilriggcompanys is responsible for what's going on there...[:0]0 -
i thought that they pumped a heavy brine solution into the ground in order to float the oil up out of the ground?
if so that would mean those "cavities" are now full of salt water ?0 -
quote:Originally posted by Talented
[8D] Here we go again i guesse.
Havent read bout boomerangs in years untill i did after my first post on this subject(u know just surfing round the net)...and then Mr boomerang shows up ...Funny coincidence i think.
It's either the "X"man factor or i posses psyforce abilitys...Cant really make up my mind with explanation makes the most sence though. [:)][;)]
But i see the implications if the Indonesians would start believing the oilriggcompanys is responsible for what's going on there...[:0]
"Let me splain Lucy"
1. Oil is not pumped out of a large cavity in the earth as coal or salt would be mined out of the earth. Although salt and coal mines are considered large cavities in the earth, by human standards, they really are not when the size of the crust and mantle are compared.
2. Oil is pumped from interconnected small, very small pours in the rock strata. At most one would get slow, very slow to minor subsidence of the areas above oil pay zones, as along the gulf coast and Texas.
3. When a magnitude 7.5 quake occurs, a TREMENDOUS amount of energy is released quickly and is then transmitted for thousands of miles in the Earth's crust.
4. A mine collapse will just not generate the amount of energy as required to measure a 7.5 quake event.
5. To put it into perspective, a mine collapse would release the amount of energy of a small tactical nuke, a 1 kilo ton of bomb. The quake that just occurred in Indonesia has the force of roughly 180 mega tons of explosives.
6. As one can see this difference between these two events is approximatley 180,000 times more powerful when compared.
Hope this helps to splain the difference Lucy.0 -
quote:Originally posted by Odawgp
i thought that they pumped a heavy brine solution into the ground in order to float the oil up out of the ground?
if so that would mean those "cavities" are now full of salt water ?
No that heavy brine solution is to kill the well so it doesn't come in while they are working on it. There are various ways to bring a well that doesn't want to come in.
One is kind of like siphoning used by slickline. You run a tool that has a bunch of rubber cups that are about the size of the ID of the tubing. You go down until you grab some fluid and come roaring up the hole and have chixin (sp?) line connected to a fluid tank where all the fluid goes to. You do two things by this. One you take the heavy calcuim bromide out and it also acts like siphoning. This is the old way and not used often anymore.
The other way is to run coil tubing. Coil tubing is huge reels of 20k feet or however much 1 1/4 tubing (comes in different sizes) thats hollow in the middle. They can circulate fluid with coil tubing and pump. They run into the hole and circulate all the heavy fluid or (or the rig may before hand) and pump nitrogen. The nitrogen lifts the oil and starts it to flowing. This way is commonly used now.
The other way if a well just won't come in is they use gas lift. Gas lift is little tubes that go into the side the production tubing. When they are running the tubing they run steel lines as they go to these gas lift pockets and connect them on top to gas. Then they pump gas down the well to lift the oil out. Hence the name gas lift. Gas lift is used throughout the life of the well as the other two methods to bring the well in are only used at the start and then the well will flow on it's own.
Not sure how big the pockets we create flowing oil. I know they start out in thin sheets between the layers of earth. Then they drill down to the oil and frak (sp?). Fraking is basically pumping a ton of fine sand down into the formation to widen the thin layers of oil.
Edit: Those pockets are now filled with the fine sand.0 -
Who's Lucy miss Bomerang ?? Your sister ?
Anyway i see a connection here.
Sensitive tectonic edgearea + Oilfield = Earthquake.
Anyway they do use explosives to explore the size of oilfields right ! ?0 -
And detonators are usually used to set of the base explosives.
So maybe something in the oilfields acts as a detonator that sets off the base tectonicplate....This one is dedicated to your sis Lucy
[;)]
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I add this for reference
http://www.sr.se/cgi-bin/euroarctic/artikel.asp?Artikel=1265137&preview=db0 -
quote:Originally posted by Talented
Who's Lucy miss Bomerang ?? Your sister ?
Anyway i see a connection here.
Sensitive tectonic edgearea + Oilfield = Earthquake.
Anyway they do use explosives to explore the size of oilfields right ! ?
The only times I'm aware there are expolsives used in is when looking for oil, but from what I heard it's not large at all. I know when I worked for Schlumberger we had what was called ground pounders. Huge machines that would hit the ground and get readings from the vibration they made.
The only other normal time I know they use explosions in the oilfield is when they run down and shoot off their perfs that just make holes in the casing to get at the formation. I would considering these explosions that large at all.
If a well blows out and get on fire sometimes I've heard of Boots'n'Coots using explosives to blow out the fire, but that is on surface.0 -
quote:Originally posted by Talented
I add this for reference
http://www.sr.se/cgi-bin/euroarctic/artikel.asp?Artikel=1265137&preview=dbWell there you go!! This article clearly indicates that this is the largest mine quake ever felt to date. A 2.9 Richter magnitude, located 260 meters below ground surface. In contrast, the Jakarta, Indonesia quake measured 7.5 Richter magnitude, located 180 miles below surface.
Lucy, are you beginning to see the difference?
A 3.0 magnitude quake is roughly equivalent to 32 metric tons of explosives. This would be equivalent to a Massive Ordnance Air Blast bomb.
A 7.5 magnitude quake is roughly equivalent to 180 megatons of explosives. I have no analogy for this amount of energy release. Believe me, this is big, really big.
The difference in magnitude of this mine generated quake to the Jakarta quake is even larger that I noted in the previous post. I was using a 4.0 magnitude quake for reference for a mine quake. This time the difference in an explosive energy release is roughly 5,250,000 times larger than the quake you referenced.
As a side note, you must be either young or not from the USA if you do not know the "Lucy" reference It is from an old TV show called I love Lucy.
Lastly you are attempting to argue with a geologist that has a background in the oil patch and tectonics. The data you present is just not adequate to support your position. I suggest you read more about tectonics and oil production methods before you assert your ideas.0 -
Hmm no i'm not a geologists .That's why i ask here to hear what other people think.Anyway ofcourse [:D] I'm never ever going to shut up.and i dont think i trust paid people in the trade all that much....[;)]
But thankyou for your insight in the matter,it have been educational.
Ps thanks to Kodiak to for charing your knowleague to.0
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