公开(公告)号：EP1556458B1

公开(公告)日：2007-01-03

申请号：EP03769417.1

申请日：2003-10-17

申请人： Services Pétroliers Schlumberger ,  SCHLUMBERGER HOLDINGS LIMITED ,  SCHLUMBERGER TECHNOLOGY B.V. ,  SOFITECH N.V.

发明人： WILLBERG, Dean ,  DISMUKE, Keith

IPC分类号： C09K8/02 ,  E21B33/138 ,  E21B37/06 ,  C09K8/04

CPC分类号： C09K8/06 ,  C09K8/03 ,  C09K8/5045 ,  C09K8/506 ,  C09K8/72 ,  C09K8/74 ,  Y10S507/923 ,  Y10S507/933

摘要： A composition and method are given for self-destructive fluid loss additives and filter cakes in wellbores and subterranean formations. The fluid loss additives and filter cakes are formed from a mixture of particulate solid acid-precursors, such as a polylactic acid or a polyglycolic acid, and particulate solid acid-reactive materials, such as magnesium oxide or calcium carbonate. In the presence of water, the solid acid-precursors hydrolyze and dissolve, generating acids that then dissolve the solid acid-reactive materials. The composition is used in oilfield treatments such as drilling, completion and stimulation where it disappears when it is no longer needed without the use of mechanical means or injection of additional fluids.

公开(公告)号：EP0929619B1

公开(公告)日：2006-11-22

申请号：EP97936442.9

申请日：1997-08-01

申请人： M-I L.L.C.

发明人： PATEL, Arvind, D.

IPC分类号： C09K8/32 ,  C09K8/04

CPC分类号： C09K8/32 ,  C09K8/36 ,  C09K8/52 ,  E21B21/068 ,  Y10S507/921 ,  Y10S507/933

摘要： New drilling fluids have been invented which are invert emulsion fluids comprising an oleaginous liquid, a non-oleaginous liquid, and a protonated amine. Such fluids are acidic and thus useful in drilling wells in which acidic gases such as CO2 or H2S are likely to be encountered and break, i.e. de-emulsify, the drilling fluid.

公开(公告)号：EP1718713A2

公开(公告)日：2006-11-08

申请号：EP05708363.6

申请日：2005-02-15

申请人： HALLIBURTON ENERGY SERVICES, INC.

发明人： CASSIDY, Juanita, M. ,  LANE, Jim, L. ,  KISER, Chad, E.

IPC分类号： C09K3/00

CPC分类号： C23F11/04 ,  C09K8/524 ,  C09K8/54 ,  C09K8/74 ,  C23F11/143 ,  Y10S166/902 ,  Y10S507/933 ,  Y10S507/934

摘要： The present invention relates to acidic treatment fluids that comprise an acid fluid and an ester-containing quaternary ammonium compound ('esterquat') and methods of their use. One embodiment of the present invention provides a method of inhibiting metal corrosion during a subterranean treatment operation comprising using an acidic treatment fluid comprising an acidic fluid and an esterquat. Another embodiment of the present invention provides a method of reducing sludge formation during a subterranean treatment operation formation comprising the step of using an acidic treatment fluid comprising an acidic fluid and an esterquat. Another embodiment of the present invention provides a method of inhibiting the formation of emulsions during a subterranean treatment operation comprising using an acidic treatment fluid comprising an acidic fluid and an esterquat. Another embodiment of the present invention provides an acidic subterranean treatment fluid comprising an acidic fluid and an esterquat.

公开(公告)号：EP1366269B1

公开(公告)日：2006-07-12

申请号：EP02702557.6

申请日：2002-03-07

申请人： HALLIBURTON ENERGY SERVICES, INC.

发明人： BREZINSKI, Michael, M.

IPC分类号： E21B43/27 ,  E21B41/02 ,  C23F11/04

CPC分类号： C09K8/74 ,  C09K2208/32 ,  Y10S507/933 ,  Y10S507/934

摘要： An acidizing composition and a method of acidizing a hydrocarbon bearing subterranean formation in the presence of ferric ions are provided. The acidizing composition includes a strong mineral acid solution, an electron donor agent, a primary electron transfer agent and a secondary electron transfer agent. The primary electron agent is a source of rhenium ions. The secondary electron transfer agent is a source of iodide ion or iodine. The electron donor agent and primary and secondary electron transfer agents function together to reduce ferric ion present in the mineral acid solution to ferrous ion which in turn prevents ferric hydroxide and/or free sulfur from precipitating out of the solution and reduces the formation of sludge in crude oil in the formation. The particular electron transfer agents used in connection with the invention function with virtually all known electron donor agents.

公开(公告)号：EP1618282A1

公开(公告)日：2006-01-25

申请号：EP04728371.8

申请日：2004-04-20

申请人： SERVICES PETROLIERS SCHLUMBERGER ,  SCHLUMBERGER HOLDINGS LIMITED ,  SCHLUMBERGER TECHNOLOGY B.V. ,  SOFITECH N.V.

发明人： FRENIER, Wayne ,  ZIAUDDIN, Murtaza ,  DAVIES, Stephen ,  CHANG, Frank

IPC分类号： E21B43/27

CPC分类号： C09K8/52 ,  C09K8/74 ,  C09K8/845 ,  C09K8/86 ,  Y10S507/933

摘要： An aqueous oilfield treatment fluid containing a chelating agent and an HF source is described. This fluid is effective at dissolving siliceous materials such as clays and keeping the dissolved materials in solution. In particular it is effective at preventing re-precipitation of initially-dissolved silicon as silica and therefore reduces damage to sandstones with which it is contacted. Methods are given for using this fluid for sandstone matrix stimulation, removal of clay-containing drilling fluid components and filter cakes from wellbores, sandstone acid fracturing, and gravel pack and proppant pack cleaning.

公开(公告)号：EP1604095A2

公开(公告)日：2005-12-14

申请号：EP04705470.5

申请日：2004-01-27

申请人： SERVICES PETROLIERS SCHLUMBERGER ,  SCHLUMBERGER HOLDINGS LIMITED ,  Sclumberger Technology B.V. ,  SOFITECH N.V.

发明人： CHAN, Keng, S. ,  BROWN, J., Ernest ,  MILNE, Arthur, William ,  RIMMER, Brett ,  BRADY, Mark

IPC分类号： E21B43/267 ,  E21B43/27

CPC分类号： C09K8/72 ,  C09K8/80 ,  E21B43/267 ,  Y10S507/923 ,  Y10S507/933 ,  Y10S507/934

摘要： Propped fractures in formations from which fluids are produced are described that have wormholes extending out into the formations from the faces of the fractures at locations distant from boreholes. Methods are given for creating such propped fractures having wormholes in which either a closed propped fracture is formed and then the wormholes are formed, or the entire fracture and channel system is formed before the closure occurs.

公开(公告)号：EP1499790B1

公开(公告)日：2005-11-16

申请号：EP03722527.3

申请日：2003-04-18

申请人： Akzo Nobel N.V.

发明人： DOBSON, Randy, Ezell ,  MOSS, David, Kelly ,  PREMACHANDRAN, Raman, Sarasamma

IPC分类号： E21B43/27 ,  C09K3/00 ,  E21B43/26

CPC分类号： C09K8/12 ,  C09K3/00 ,  C09K8/22 ,  C09K8/506 ,  C09K8/60 ,  C09K8/62 ,  C09K8/74 ,  C09K8/86 ,  C09K2208/30 ,  Y10S507/922 ,  Y10S507/933

公开(公告)号：EP1556582A1

公开(公告)日：2005-07-27

申请号：EP03776870.2

申请日：2003-10-24

申请人： Services Pétroliers Schlumberger ,  Schlumberger Holdings Limited ,  Schlumberger Technology B.V. ,  SOFITECH N.V.

发明人： STILL, John ,  DISMUKE, Keith ,  FRENIER, Wayne

IPC分类号： E21B43/27

CPC分类号： C09K8/06 ,  C09K8/03 ,  C09K8/5045 ,  C09K8/506 ,  C09K8/72 ,  C09K8/74 ,  Y10S507/923 ,  Y10S507/933

摘要： An acid fracturing method is provided in which the acid is generated in the fracture by hydrolysis of a solid acid-precursor selected from one or more than one of lactide, glycolide, polylactic acid, polyglycolic acid, a copolymer of polylactic acid and polyglycolic acid, a copolymer of glycolic acid with other hydroxy-, carboxylic acid-, or hydroxycarboxylic acid-containing moieties, and a copolymer of lactic acid with other hydroxy-, carboxylic acid or hydroxycarboxylic acid-containing moieties. The solid acid-precursor may be mixed with a solid acid-reactive material to accelerate the hydrolysis and/or coated to slow the hydrolysis. Water-soluble liquid compounds are also given that accelerate the hydrolysis. The method ensures that the acid contacts fracture faces far from the wellbore.

公开(公告)号：EP1556458A1

公开(公告)日：2005-07-27

申请号：EP03769417.1

申请日：2003-10-17

申请人： Services Pétroliers Schlumberger ,  Schlumberger Holdings Limited ,  Schlumberger Technology B.V. ,  SOFITECH N.V.

发明人： WILLBERG, Dean ,  DISMUKE, Keith

IPC分类号： C09K7/00 ,  E21B33/138 ,  E21B37/06 ,  C09K7/02

CPC分类号： C09K8/06 ,  C09K8/03 ,  C09K8/5045 ,  C09K8/506 ,  C09K8/72 ,  C09K8/74 ,  Y10S507/923 ,  Y10S507/933

摘要： A composition and method are given for self-destructive fluid loss additives and filter cakes in wellbores and subterranean formations. The fluid loss additives and filter cakes are formed from a mixture of particulate solid acid-precursors, such as a polylactic acid or a polyglycolic acid, and particulate solid acid-reactive materials, such as magnesium oxide or calcium carbonate. In the presence of water, the solid acid-precursors hydrolyze and dissolve, generating acids that then dissolve the solid acid-reactive materials. The composition is used in oilfield treatments such as drilling, completion and stimulation where it disappears when it is no longer needed without the use of mechanical means or injection of additional fluids.

公开(公告)号：EP1442198A1

公开(公告)日：2004-08-04

申请号：EP02761606.9

申请日：2002-09-09

申请人： BAKER HUGHES INCORPORATED

发明人： POELKER, David, J. ,  MCMAHON, JoAnn ,  HARKEY, Dee

IPC分类号： E21B43/27 ,  C08L33/08 ,  C08L33/26

CPC分类号： C08F220/56 ,  C08F220/06 ,  C09K8/74 ,  Y10S507/903 ,  Y10S507/923 ,  Y10S507/933

摘要： Disclosed is a copolymer useful for preparing acid gels comprising a copolymer having a copolymer backbone, the copolymer having a general formula (I): wherein: (a) A is an H or other terminating group; (b) R1 is an OH or NH2; (c) R2 is an O or NH; (d) Z is an integer having a value of from 1 to 4; (e) X and Y are present in a ratio (X:Y) of from 3:2 to 4:1; (f) structures I and II are present as blocks or randomly distributed along the copolymer backbone; and wherein the copolymer has a molecular weight of from about 1,000,000 to about 10,000,000.