Changes

Four basic tools must be put together in a structural play or prospect, regardless of local structural style, level of structural complexity, or exploration maturity:

Four basic tools must be put together in a structural play or prospect, regardless of local structural style, level of structural complexity, or exploration maturity:

* A structure contour map on top of the reservoir.

* A structure [[contour]] map on top of the reservoir.

* An isopach map of the target reservoir—especially important if the reservoir displays significant stratigraphic thickness variation or has behaved in a [[Ductility|ductile]] or compactive manner during [[deformation]].

* An [[Subsurface_maps#Isopach|isopach map]] of the target reservoir—especially important if the reservoir displays significant stratigraphic thickness variation or has behaved in a [[Ductility|ductile]] or compactive manner during [[deformation]].

* Two or more structural [[cross section]]s incorporating all surface and subsurface control (wells and seismic) projected into the line of section in both the strike and dip directions.

* Two or more structural [[cross section]]s incorporating all surface and subsurface control (wells and [[seismic data]]) projected into the line of section in both the [[strike]] and [[dip]] directions.

* Fault-surface maps (structural contours on the fault plane), made for all faults critical to closure at the top of the reservoir.

* Fault-surface maps (structural contours on the fault plane), made for all faults critical to closure at the top of the reservoir.