PANCONTINENTAL OIL - Projekte in Australien, Kenya, Malta, Marocco und Namibia (Seite 185)
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Zum Bohren bis hin für den gewerblichen Gebrauch sind mehrere Casings nötig (bei abnehmendem Diameter):
1. conductor casing (quasi die "Führung" an der Oberfläche)
2. surface casing (zur Stabilisierung)
3. intermediate casing (Verbindung zwischen surface und production casing)
4. production casing (für die Produktion)
Erklärung im Detail:
CONDUCTOR CASING
Normal size - 18 5/8”- 30”
(always cemented upto surface)
To protect near surface unconsolidated formations.
Seal off shallow water zones.
Provide protection against shallow gas zones.
To protect the foundation of the platform in off-shore operations.
It is used to support subsequent casing strings and well head equipment or alternatively the pipe is cut off at the surface after setting
SURFACE CASING
Normal size - 13 3/8” – 18 5/8”or 20”.
Should be set in competent rocks.
To prevent caving of weak formations and maintain hole integrity.
Cover fresh water sands and prevent their contamination by fluids from deeper formation.
Minimize lost circulation into shallow permeable zones.
Cover weak zones that are incompetent to control kick imposed pressures.
Provide a means for attaching the blow-out preventers.
Support the weight of all casing strings (except liners) run below the surface pipes.
INTERMEDIATE CASING
Normal size - 95/8” – 13 3/8”
It is set at a depth between the surface and production casing.
Troublesome zones encountered include those with abnormal formation pressures, lost circulation, unstable shales and salt section.
Good cementation of this casing must be ensured to prevent communication behind the casing between the lower hydrocarbon zones and upper water formations. Longer cement columns are sometimes necessary to prevent casing buckling.
Multi-stage cementation may be opted for.
PRODUCTION CASING
Normal size - 5” - 7”
(May be set above, mid-way or below pay zone)
Isolate the producing zone from other formations.
provide a work shaft of a known diameter to the pay zone.
protect the production tubing and other equipments
http://casingandtubingrunningservices.blogspot.co.at/
1. conductor casing (quasi die "Führung" an der Oberfläche)
2. surface casing (zur Stabilisierung)
3. intermediate casing (Verbindung zwischen surface und production casing)
4. production casing (für die Produktion)
Erklärung im Detail:
CONDUCTOR CASING
Normal size - 18 5/8”- 30”
(always cemented upto surface)
To protect near surface unconsolidated formations.
Seal off shallow water zones.
Provide protection against shallow gas zones.
To protect the foundation of the platform in off-shore operations.
It is used to support subsequent casing strings and well head equipment or alternatively the pipe is cut off at the surface after setting
SURFACE CASING
Normal size - 13 3/8” – 18 5/8”or 20”.
Should be set in competent rocks.
To prevent caving of weak formations and maintain hole integrity.
Cover fresh water sands and prevent their contamination by fluids from deeper formation.
Minimize lost circulation into shallow permeable zones.
Cover weak zones that are incompetent to control kick imposed pressures.
Provide a means for attaching the blow-out preventers.
Support the weight of all casing strings (except liners) run below the surface pipes.
INTERMEDIATE CASING
Normal size - 95/8” – 13 3/8”
It is set at a depth between the surface and production casing.
Troublesome zones encountered include those with abnormal formation pressures, lost circulation, unstable shales and salt section.
Good cementation of this casing must be ensured to prevent communication behind the casing between the lower hydrocarbon zones and upper water formations. Longer cement columns are sometimes necessary to prevent casing buckling.
Multi-stage cementation may be opted for.
PRODUCTION CASING
Normal size - 5” - 7”
(May be set above, mid-way or below pay zone)
Isolate the producing zone from other formations.
provide a work shaft of a known diameter to the pay zone.
protect the production tubing and other equipments
http://casingandtubingrunningservices.blogspot.co.at/
Staberhuk, die Primary Targets wurden zwischen 1.800 und 2.200 m vermutet. Siehe hierzu S. 14 der letzten PCL-Präsentation (Stand 06/12):
http://www.pancon.com.au/investor-centre/company-presentatio…
http://www.pancon.com.au/investor-centre/company-presentatio…
Antwort auf Beitrag Nr.: 43.536.761 von Staberhuk am 27.08.12 11:54:52Hallo,
ich bin der absolute "Nichtfachmann" was Öl angeht.
Aber ich habe eine Interessante Erklärung gefunden.....
CASING EINSETZEN – Das Casing in ein Bohrloch zementieren. Der Zement wird durch das Bohrgestänge zum tiefsten Punkt des Bohrlochs und dann in den Ringraum zwischen Rohrgestänge und Bohrwand des Bohrlochs nach oben gepumpt. Dann lässt man ihn aushärten, damit er die oberen Gesteinsschichten, die Wasser enthalten können, abdichtet. Die geringe Menge an Zement im Casing wird im Zuge der Vorbereitungen für die Perforation herausgebohrt, damit das Öl in das Casing fließen kann. Die Entscheidung, ein Casing (oder Rohr) zu verlegen ist ein Indiz dafür, dass der Betreiber daran glaubt, die Quelle gewerblich nutzen zu können.
CASING POINT – Zeitpunkt, zu dem die Entscheidung darüber fallen muss, ob ein Casing verlegt wird oder ob das Bohrloch ausgelassen und mit einem Verschluss verschlossen wird. Bei einer gemeinsamen Betriebsvereinbarung bezieht sich Casing Point auf den Zeitpunkt, wenn ein Bohrloch bis zu einer objektiven Tiefe gebohrt wurde, Tests durchgeführt wurden und der Betreiber den Bohrparteien seine Empfehlung abgibt, das Casing und den Förderstrang zu verlegen und das Bohrloch fertig zu stellen. Bei Bohrlöchern mit geringer Förderung ist die Entscheidung, ob ein Casing verlegt wird, oft sehr schwierig. Das Casing eines Bohrlochs kostet häufig genau so viel wie das Bohren an sich. Bei ertragbringenden Bohrlöchern wird nicht gezögert; die Betrieber freuen sich, das Casing zu verlegen und das Bohrloch fertigzustellen.
CASING-PUMPE – Eine Tiefpumpe, mit der Öl durch das Casing gepumpt wird, anstatt des verbreiteten Verfahrens des Pumpens durch die Leitungen. Eine Casing-Pumpe wird im Bohrloch an Pumpgestängen verlegt; ein Packer am oberen oder unteren Ende des Pumpfasses stellt eine Sperre zwischen der Pumpe und der Casing-Wand in der gewünschten Tiefe dar. Das Öl fließt von der Pumpe in das Casing und aus dem Bohrloch heraus.
Quelle: http://texasoilandmineral.com/de/glossar/#c
Allerdings sagt der Bericht nichts darüber aus, warum ein oder zwei Casings!!!
Gruß
Stefan
ich bin der absolute "Nichtfachmann" was Öl angeht.
Aber ich habe eine Interessante Erklärung gefunden.....
CASING EINSETZEN – Das Casing in ein Bohrloch zementieren. Der Zement wird durch das Bohrgestänge zum tiefsten Punkt des Bohrlochs und dann in den Ringraum zwischen Rohrgestänge und Bohrwand des Bohrlochs nach oben gepumpt. Dann lässt man ihn aushärten, damit er die oberen Gesteinsschichten, die Wasser enthalten können, abdichtet. Die geringe Menge an Zement im Casing wird im Zuge der Vorbereitungen für die Perforation herausgebohrt, damit das Öl in das Casing fließen kann. Die Entscheidung, ein Casing (oder Rohr) zu verlegen ist ein Indiz dafür, dass der Betreiber daran glaubt, die Quelle gewerblich nutzen zu können.
CASING POINT – Zeitpunkt, zu dem die Entscheidung darüber fallen muss, ob ein Casing verlegt wird oder ob das Bohrloch ausgelassen und mit einem Verschluss verschlossen wird. Bei einer gemeinsamen Betriebsvereinbarung bezieht sich Casing Point auf den Zeitpunkt, wenn ein Bohrloch bis zu einer objektiven Tiefe gebohrt wurde, Tests durchgeführt wurden und der Betreiber den Bohrparteien seine Empfehlung abgibt, das Casing und den Förderstrang zu verlegen und das Bohrloch fertig zu stellen. Bei Bohrlöchern mit geringer Förderung ist die Entscheidung, ob ein Casing verlegt wird, oft sehr schwierig. Das Casing eines Bohrlochs kostet häufig genau so viel wie das Bohren an sich. Bei ertragbringenden Bohrlöchern wird nicht gezögert; die Betrieber freuen sich, das Casing zu verlegen und das Bohrloch fertigzustellen.
CASING-PUMPE – Eine Tiefpumpe, mit der Öl durch das Casing gepumpt wird, anstatt des verbreiteten Verfahrens des Pumpens durch die Leitungen. Eine Casing-Pumpe wird im Bohrloch an Pumpgestängen verlegt; ein Packer am oberen oder unteren Ende des Pumpfasses stellt eine Sperre zwischen der Pumpe und der Casing-Wand in der gewünschten Tiefe dar. Das Öl fließt von der Pumpe in das Casing und aus dem Bohrloch heraus.
Quelle: http://texasoilandmineral.com/de/glossar/#c
Allerdings sagt der Bericht nichts darüber aus, warum ein oder zwei Casings!!!
Gruß
Stefan
Ebenfalls vom user "thecableguy" aus dem Hotcopper Forum. Als Laie finde ich diese Erläuterungen sehr interessant:
How Does Casing Work?
Once a well has been drilled, if it is to become a production well, the well must undergo completion. While drilling a well cuts through the rock formations and allows drilling engineers to reach the reservoir below, the raw sides of the well cannot support themselves. Similar to the bones of your spine protecting the spinal cord, casing is tubing that is set inside the drilled well to protect and support the wellstream.
Casing
In addition to providing stabilization and keeping the sides of the well from caving in on themselves, casing protects the wellstream from outside contaminants, as well as any fresh water reservoirs from the oil or gas that is being produced.
Also known as setting pipe, casing a well involves running steel pipe down the inside of a recently drilled well. The small space between the casing and the untreated sides of the well is filled with cement to permanently set the casing in place.
Casing a Well
The casing is fabricated in sections, or joints, that are usually about 40 feet long and screwed together to form longer lengths of casing, called casing strings. Each end of the casing joint has male threads that are protected by cap called a thread protector until the casings are ready to be jointed. Then, a collar or coupling, composed of a short cylindrical steel pipe that is slightly larger in diameter than the joints and also has female threads, is used to connect the two male joint ends. A thread compound is used on the two ends to ensure a tight seal.
Coupling
Casing is run from the rig floor, connected one joint at a time by casing elevators on the traveling block and stabbed into the previous casing string that has been inserted into the well. Hanging above the drill floor, casing tongs screw each casing joint to the casing string.
Casing is run into the well and officially landed when the weight of the casing string is transferred to the casing hangers, which are located at the top of the well and use slips or threads to suspend the casing in the well.
A rounded section of pipe with an open hole on the end, a guide shoe is connected to the first casing string to guide the casing crew in running the casing into the well. Additionally, the outside of the casing has spring-like centralizers attached to them to help position in casing string in the center of the well.
After running the casing and before the cementing the well, a used drill bit is inserted into the well via a drillstring, and drilling fluid is then circulated for a certain amount of time to remove any remaining cuttings from the well. Also wall scratchers are dispatched into the well to remove any filter cake that may have formed on the sides of the well.
A cement slurry is then pumped into the well and allowed to harden to permanently fix the casing in place. After the cement has hardened, the bottom of the well is drilled out, and the completion process continues.
Casing Programs
Sometimes the well is drilled in stages called a casing program. Here, a well is drilled to a certain depth, cased and cemented, and then the well is drilled to a deeper depth, cased and cemented again, and so on. Each time the well is cased, a smaller diameter casing is used.
Casing program
The widest type of casing is called conductor pipe, and it usually is about 30 to 42 inches in diameter for offshore wells and 16 inches in diameter for onshore wells. The next size in casing string is the surface casing, which can run several thousand feet in length.
In some wells, protection or intermediate casing is run to separate challenging areas or problem zones, including areas of high pressure or lost circulation.
The last type of casing string that is run into the well, and therefore the smallest in diameter, is the production or oil string. The oil string is run directly into the producing reservoir.
Casing Alternatives
In an effort to save money, sometimes a liner string is run into the well instead of a casing string. While a liner string is very similar to casing string in that it is made up of separate joints of tubing, the liner string is not run the complete length of the well. A liner string is hung in the well by a liner hanger, and then cemented into place.
How Does Casing Work?
Once a well has been drilled, if it is to become a production well, the well must undergo completion. While drilling a well cuts through the rock formations and allows drilling engineers to reach the reservoir below, the raw sides of the well cannot support themselves. Similar to the bones of your spine protecting the spinal cord, casing is tubing that is set inside the drilled well to protect and support the wellstream.
Casing
In addition to providing stabilization and keeping the sides of the well from caving in on themselves, casing protects the wellstream from outside contaminants, as well as any fresh water reservoirs from the oil or gas that is being produced.
Also known as setting pipe, casing a well involves running steel pipe down the inside of a recently drilled well. The small space between the casing and the untreated sides of the well is filled with cement to permanently set the casing in place.
Casing a Well
The casing is fabricated in sections, or joints, that are usually about 40 feet long and screwed together to form longer lengths of casing, called casing strings. Each end of the casing joint has male threads that are protected by cap called a thread protector until the casings are ready to be jointed. Then, a collar or coupling, composed of a short cylindrical steel pipe that is slightly larger in diameter than the joints and also has female threads, is used to connect the two male joint ends. A thread compound is used on the two ends to ensure a tight seal.
Coupling
Casing is run from the rig floor, connected one joint at a time by casing elevators on the traveling block and stabbed into the previous casing string that has been inserted into the well. Hanging above the drill floor, casing tongs screw each casing joint to the casing string.
Casing is run into the well and officially landed when the weight of the casing string is transferred to the casing hangers, which are located at the top of the well and use slips or threads to suspend the casing in the well.
A rounded section of pipe with an open hole on the end, a guide shoe is connected to the first casing string to guide the casing crew in running the casing into the well. Additionally, the outside of the casing has spring-like centralizers attached to them to help position in casing string in the center of the well.
After running the casing and before the cementing the well, a used drill bit is inserted into the well via a drillstring, and drilling fluid is then circulated for a certain amount of time to remove any remaining cuttings from the well. Also wall scratchers are dispatched into the well to remove any filter cake that may have formed on the sides of the well.
A cement slurry is then pumped into the well and allowed to harden to permanently fix the casing in place. After the cement has hardened, the bottom of the well is drilled out, and the completion process continues.
Casing Programs
Sometimes the well is drilled in stages called a casing program. Here, a well is drilled to a certain depth, cased and cemented, and then the well is drilled to a deeper depth, cased and cemented again, and so on. Each time the well is cased, a smaller diameter casing is used.
Casing program
The widest type of casing is called conductor pipe, and it usually is about 30 to 42 inches in diameter for offshore wells and 16 inches in diameter for onshore wells. The next size in casing string is the surface casing, which can run several thousand feet in length.
In some wells, protection or intermediate casing is run to separate challenging areas or problem zones, including areas of high pressure or lost circulation.
The last type of casing string that is run into the well, and therefore the smallest in diameter, is the production or oil string. The oil string is run directly into the producing reservoir.
Casing Alternatives
In an effort to save money, sometimes a liner string is run into the well instead of a casing string. While a liner string is very similar to casing string in that it is made up of separate joints of tubing, the liner string is not run the complete length of the well. A liner string is hung in the well by a liner hanger, and then cemented into place.
Antwort auf Beitrag Nr.: 43.536.067 von Staberhuk am 27.08.12 09:32:37Eine Frage an unsere Fachleute:
Welche Gründe könnte es geben nach nur einem Meter drill das 2. casing zu setzen? Könnte man es nicht vorher auch gesetzt haben oder sieht man möglicherweise plötzlich aus bestimmten Gründen die Erforderlichkeit.
Ganz ausschließen kann man natürlich auch nicht Kommunikationsstörungen zwischen dem Operator und PCL.
Welche Gründe könnte es geben nach nur einem Meter drill das 2. casing zu setzen? Könnte man es nicht vorher auch gesetzt haben oder sieht man möglicherweise plötzlich aus bestimmten Gründen die Erforderlichkeit.
Ganz ausschließen kann man natürlich auch nicht Kommunikationsstörungen zwischen dem Operator und PCL.
Trading Spotlight
Das fiel mir in der Meldung auch auf, dass nämlich nur 1 Meter gedrillt wurde, um dann das casing zu setzen.
Aus Hotcopper vom user "thecableguy":
Only drilled 1 metre in the last 3 days, must have been the 2nd casing being set.
Regards,
TCG
i.e. 24/08
? First casing set at 1,503m
? Current drill depth is 2,005m
KENYA L8 MBAWA DRILLING
Pancontinental Oil & Gas NL (“Pancontinental”) is pleased to announce that the first casing
string in the Mbawa well has been set at 1,503m RT (below the drill floor).
Drilling has continued below the first casing and the depth of the well at 10:00 AEST was
2,005m RT.
27/08
KENYA L8- MBAWA DRILLING UPDATE
Pancontinental Oil & Gas NL (“Pancontinental”) is pleased to announce that the Mbawa well has
reached a depth of 2,006m RT (below the drill floor), where a second casing string is being set.
Aus Hotcopper vom user "thecableguy":
Only drilled 1 metre in the last 3 days, must have been the 2nd casing being set.
Regards,
TCG
i.e. 24/08
? First casing set at 1,503m
? Current drill depth is 2,005m
KENYA L8 MBAWA DRILLING
Pancontinental Oil & Gas NL (“Pancontinental”) is pleased to announce that the first casing
string in the Mbawa well has been set at 1,503m RT (below the drill floor).
Drilling has continued below the first casing and the depth of the well at 10:00 AEST was
2,005m RT.
27/08
KENYA L8- MBAWA DRILLING UPDATE
Pancontinental Oil & Gas NL (“Pancontinental”) is pleased to announce that the Mbawa well has
reached a depth of 2,006m RT (below the drill floor), where a second casing string is being set.
ASX Companies Announcement Office
27 August 2012
KENYA L8- MBAWA DRILLING UPDATE
Pancontinental Oil & Gas NL (“Pancontinental”) is pleased to announce that the Mbawa well has
reached a depth of 2,006m RT (below the drill floor), where a second casing string is being set.
Operations are continuing according to the drilling plan.
Both the primary and main secondary exploration targets are deeper than the current drill depth
and it is anticipated that these will be penetrated at several levels below the casing once the
casing has been set and drilling has recommenced.
The planned Total Depth of the well is 3,275m RT and the deepest of the exploration targets is
near to the final planned drilling depth. The drillship Deepsea Metro 1 is expected to spend a
total of about 60 days for well operations.
Additional information about Mbawa is available in previous reports issued by Pancontinental
and available on the company’s website www.pancon.com.au
The Kenya L8 Joint Venture consortium consists of-
Apache Corporation (Operator) 50%
Origin Energy Limited 20%
Pancontinental Oil & Gas NL 15%*
Tullow KenyaB.V. 15%
* Pancontinental’s 15% interest is “free-carried” through Mbawa drilling by Tullow Oil plc up to a
“cap” of US$ 9 million (as reduced by other exploration expenditure). After the first earning phase
Tullow has an option to earn a further 5% by providing funding on Pancontinental’s behalf to a
cap of US$ 6 million in any second well.
Pancontinental’s website is www.pancon.com.au/
Yours sincerely for and on behalf of
Pancontinental Oil & Gas NL
Barry
27 August 2012
KENYA L8- MBAWA DRILLING UPDATE
Pancontinental Oil & Gas NL (“Pancontinental”) is pleased to announce that the Mbawa well has
reached a depth of 2,006m RT (below the drill floor), where a second casing string is being set.
Operations are continuing according to the drilling plan.
Both the primary and main secondary exploration targets are deeper than the current drill depth
and it is anticipated that these will be penetrated at several levels below the casing once the
casing has been set and drilling has recommenced.
The planned Total Depth of the well is 3,275m RT and the deepest of the exploration targets is
near to the final planned drilling depth. The drillship Deepsea Metro 1 is expected to spend a
total of about 60 days for well operations.
Additional information about Mbawa is available in previous reports issued by Pancontinental
and available on the company’s website www.pancon.com.au
The Kenya L8 Joint Venture consortium consists of-
Apache Corporation (Operator) 50%
Origin Energy Limited 20%
Pancontinental Oil & Gas NL 15%*
Tullow KenyaB.V. 15%
* Pancontinental’s 15% interest is “free-carried” through Mbawa drilling by Tullow Oil plc up to a
“cap” of US$ 9 million (as reduced by other exploration expenditure). After the first earning phase
Tullow has an option to earn a further 5% by providing funding on Pancontinental’s behalf to a
cap of US$ 6 million in any second well.
Pancontinental’s website is www.pancon.com.au/
Yours sincerely for and on behalf of
Pancontinental Oil & Gas NL
Barry
Hi Wasa 
und PCLer,
Das gesamte Drilling läuft bislang wunderbar nach Plan; inzwischen wird das zweite Casing gesetzt - das scheint bislang alles sehr professionell und effizient...
Seit drei Tagen haben wir Drilling-Pause; ich denke bis Ende der Woche sollten sie das Drilling wieder aufnehmen und dann heißt es den Atem anhalten....
Die nächste Woche wird bestimmt aufregend... Gut, dass uns PCL mit regelmäßigen Updates versorgt...
und PCLer,Das gesamte Drilling läuft bislang wunderbar nach Plan; inzwischen wird das zweite Casing gesetzt - das scheint bislang alles sehr professionell und effizient...
Seit drei Tagen haben wir Drilling-Pause; ich denke bis Ende der Woche sollten sie das Drilling wieder aufnehmen und dann heißt es den Atem anhalten....
Die nächste Woche wird bestimmt aufregend... Gut, dass uns PCL mit regelmäßigen Updates versorgt...
Pompeianus: Bin auch Deiner Meinung, dass Neuigkeiten NICHT schon zu Beginn der kommenden Woche kommen werden. Meines Erachtens, vielleicht so gegen Ende der Woche oder sogar noch spaeter. Wir werden ja sehen.
Daumen druecken/fingers crossed and all that!
wasa
Daumen druecken/fingers crossed and all that!
wasa
Antwort auf Beitrag Nr.: 43.531.158 von Pompeianus am 24.08.12 18:41:59Das wird sehr wahrscheinlich so sein. Manche Hotcopper beobachten den Kurs von Apache, um ggf daraus Schlüsse zu ziehen. Ob erfolgreich, keine Ahnung.
Andererseits kann ich mir schon vorstellen, dass jemand von der Mannschaft oder den beteiligten companies - auch in deren Headquarter - das loswerden muss. Ein Fund wird sofort zu den Headquartern gemeldet.
Na, warten wir es ab.
Andererseits kann ich mir schon vorstellen, dass jemand von der Mannschaft oder den beteiligten companies - auch in deren Headquarter - das loswerden muss. Ein Fund wird sofort zu den Headquartern gemeldet.
Na, warten wir es ab.
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