SUMMARYThis paper describes the use of high quality seismic data to condition a numerical geological model of the T field, forming the basis for resource assessment and performance prediction. The T field is located in the Malay basin and was discovered in 1979, approximately 200 km offshore Terengganu, Malaysia. The primary non-associated gas (NAG) accumulation in the field is found in the shallow A/B reservoirs. These reservoirs are found at approximately 700m TVDss and consist of lower to middle Miocene siliciclastic sediments.