Three-dimensional gravity inversion using simulated annealing; Constraints on the diapiric roots of allochthonous salt structures

摘要

In the northern continental slope of the Gulf of Mexico, large oil and gas reservoirs are often found be- neath sheetlike, allochthonous salt structures that are laterally extensive. Some of these salt structures retain Their diapiric feeders or roots beneath them. These hid- Den roots are difficult to image seismically. In this study, We develop a method to locate and constrain the eom- Etry of such roots through 3-D inverse modeling of the Gravity anomalies observed over the salt structures.