Congratulation on your GMAT scores. A score above 700 is desirable when applying to top schools.
However GMAT alone won’t determine your chances of admission; beyond the academics and your work experience plays a vital role as well. So make sure you demonstrate those aspects as well.
If you wish to apply to top business schools then one of the prerequisites is having significant work experience. Generally candidates have around 4-5 years of full time experience in spite of several term time projects or jobs; so you may be competing with other candidates who have 4-5 years of full time experience and have started significant initiatives at college.
Hence, we would advise you to gain some full time work experience before you decide to apply for an MBA. Unfortunately in general most of the Indian applicants are from engineering background with a good 4-5 years of work experience. So you would need to differentiate yourself from others. Start thinking what makes you unique and what’s that ‘hook’ that will be key to your application. Make sure you follow the show rather than tell’ principle so that the admissions committee could really understand your strengths and differentiating factors.
As you want to be in consulting you should go for a simple MBA. Going for oil and gas management would firstly limit your school choice plus not all the top schools would be offering you this MBA.