Gravity modeling a rifted continental margin

A non-transitory computer-readable medium storing instructions executable by a computer system to perform operations comprising:

• accessing, by operation of the computer system, survey data that includes gravity data of a rifted continental margin;
• determining, by operation of the computer system, a value of a geometric parameter that corresponds to a desired value of a Mohorovicic Discontinuity (Moho) uplift at a specified location of the rifted continental margin;
• determining, by operation of the computer system, a Moho surface based on a value of Moho uplift at a rift center, the value of Moho uplift at the rift center determined based on the value of the geometric parameter;
• determining, by operation of the computer system, a top basement surface based on a residual gravity data associated with the Moho surface;
• outputting, by operation of the computer system, a crustal model of the rifted continental margin, the crustal model including the Moho surface and the top basement surface of the rifted continental margin;
• and
• drilling one or more wellbores based on the Moho surface and the top basement surface of the rifted continental margin in the crustal model.

A system comprising one or more computers that include:

• memory operable to store survey data;
• and
• data processing apparatus operable to:
• access survey data that includes gravity data of a rifted continental margin;
• determine a value of a geometric parameter that corresponds to a desired value of a Mohorovicic Discontinuity (Moho) uplift at a specified location of the rifted continental margin;
• determine a Moho surface based on a value of Moho uplift at a rift center, the value of Moho uplift at the rift center determined based on the value of the geometric parameter;
• determine a top basement surface based on a residual gravity data associated with the Moho surface;
• output a crustal model of the rifted continental margin, the crustal model including the Moho surface and the top basement surface of the rifted continental margin;
• and
• drill one or more wellbores based on the Moho surface and the top basement surface of the rifted continental margin in the crustal model.