公开(公告)号：EP0922237A1

公开(公告)日：1999-06-16

申请号：EP98933701.0

申请日：1998-06-24

申请人： Elf Exploration Production

发明人： HOULLEVIGUE, Henri ,  DELESALLE, Hervé ,  De BAZELAIRE, Eric

IPC分类号： G01V1

CPC分类号： G01V1/301

摘要： The invention concerns a method for producing a composite block from seismic recording blocks, characterised in that it consists in: producing independent primary seismic blocks, each seismic block being constructed from seismic data registered along a predetermined acquisition direction, so as to obtain n primary seismic blocks {Ai(x, y, z)} with i varying from 1 to n, n being greater or equal to 2; computing for each point of each primary block Ai a quality criterion value representing the seismic attribute local quality, so as to obtain n quality criterion blocks {Qi(x, y, z)} with i varying from 1 to n, each quality criterion block Qi being associated with the primary block Ai; constructing a composite seismic block C(x, y, z) whereof each sample is computed as a combination of sample values of blocks Ai(x, y, z) weighted by their relative qualities Qi(x, y, z).

公开(公告)号：EP0888562A1

公开(公告)日：1999-01-07

申请号：EP97932870.0

申请日：1997-07-09

申请人： Elf Exploration Production

发明人： DUNAND, Jean-Pierre, ,  De BAZELAIRE, Eric

IPC分类号： G01V1

CPC分类号： G01V1/362 ,  G01V2210/52

摘要： A physical attribute migration method for a medium is disclosed. The method comprises forming at least one collection of seismic traces associated with an area of the medium and classified according to a predetermined criterion, and a stack section is produced on the basis of said seismic trace collection using a stacking speed field related to said area. According to the method, (a) the product of a term related to the trace amplitude and a term related to the stacking speeds is determined; (b) the amplitude data and the product are migrated at an initial migration speed to give a migrated amplitude image and a migrated product image, respectively; (c) a ratio is established between the migrated product image data and the migrated amplitude image data to give a migrated position speed; and (d) steps (b) and (c) are iterated in such a way that the migration speed of each iteration is the same as the migrated position speed from the preceding iteration, until the deviation between the migrated position speed of the final iteration (n) and that of the penultimate iteration (n-1) is below a predetermined threshold.