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Information Seminar Paper

Title

IMPLEMENTATION OF FAST-SAGD PROCESS IN A NATURALLY FRACTURED HEAVY OIL RESERVOIR

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Abstract

HEAVY OIL RESOURCES CONTAINED IN NATURALLY FRACTURED CARBONATE RESERVOIRS ARE HUGE AND DISTRIBUTED IN MANY COUNTRIES. THE BEST WAY FOR PRODUCING THESE TYPES OF RESERVOIRS IS VISCOSITY REDUCTION BY MEANS OF THERMAL ENHANCED OIL RECOVERY (EOR) PROCESSES. AMONG THERMAL EOR PROCESSES, STEAM ASSISTED GRAVITY DRAINAGE (SAGD) HAS BEEN PROVED ECONOMICALLY AND TECHNICALLY AS ONE OF THE BEST METHODS FOR RECOVERY OF UNCONVENTIONAL OIL RESOURCES. FAST-SAGD IS A COMBINATION OF SAGD AND CYCLIC STEAM STIMULATION (CSS) VIA AN OFFSET WELL TO GROW THE STEAM CHAMBER LATERALLY. FAST- SAGD LESSENS DRILLING COSTS AND DIFFICULTIES BY DECREASING THE NEED FOR SAGD PARALLEL PAIR WELLS ONE ABOVE THE OTHER AND INCREASE THERMAL EFFICIENCY. THE EFFECTIVENESS OF THIS NEW METHOD IN NATURALLY FRACTURED RESERVOIR IS NOT WELL UNDERSTOOD. IN THIS STUDY, INITIALLY, FAST-SAGD IS COMPARED WITH STANDARD SAGD FROM AN ECONOMICAL POINT OF VIEW AND ADDITIONALLY, THE EFFECT OF SEVERAL OPERATIONAL PARAMETERS ON THE EFFICIENCY OF FAST-SAGD PROCESS IS ALSO INVESTIGATED. THE RESULTS SHOW THE RECOVERY FACTOR (RF) AND THERMAL EFFICIENCY OF FAST-SAGD IS IMPROVED ENORMOUSLY COMPARED TO SAGD. FURTHERMORE, THE OPTIMUM CASES FOR OPERATIONAL PARAMETERS HAVE BEEN DETERMINED.

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