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Brunei, Champion: very complex syn-sedimentary crossing faults

Champion field, offshore Brunei. Many crossing faults and several large growth faults in deltaic sediments. The reconstruction gives a clear view of the stratigraphic variation across the section. In the upper part there are large unconformities in a hinge line over the deformed clay core in the lower part. Data from S.T. Sandal (1996): The Geology and Hydrocarbon Resources of Negara Brunei Darussalam. ISBN 99917-900-0-4.

Slokkert Consultancy Kees Rutten Shell Brunei BSP Champion section (Sandal, 1996) Delta synsedimentary cross-faulting geology geophysics unfaulted unfolded

Notes: workflow example with six steps. Interpretation starts with the faults on the ‘easy’ left side of the structure. Then goes to the right side where correlation also is fairly ‘easy’. The middle, ‘complex’ part is then  attacked from both sides. See intermediate steps below.

Step 1

‘Easy’ left side faults original

Interpreted faults, not unfaulted.

Tip points are inserted automatically (red).

Step 2

‘Easy’ left side faults unfaulted

Interpreted faults with anchors inserted by the user.

Correlation on the left side is complete.

Step 3

‘Easy’ right side faults original.

Interpreted faults with anchors inserted by the user on the left side.

Interpreted faults without unfaulting on the right side

 

Step 4

‘Easy’ right side unfaulted

Interpreted faults with anchors inserted by the user on the left side.

Interpreted faults anchors inserted by the user on the right side.

Correlation on both left and right side is complete.

The middle part shows the deformed clay core and a collapse zone above it.

 

Step 5

Interpreting faults in the middle part

Interpreted faults with anchors inserted by the user on the left side.

Interpreted faults anchors inserted by the user on the right side.

Interpreted faults without anchors in the middle.

 

Step 6

Unfaulting all faults

Interpreted faults with anchors inserted by the user in all faults.