Carbonate reservoir forming model and exploration in Tarim Basin

Abstract

The understanding of oil and gas accumulation patterns is closely related to exploration ideas and directions. Through the exploration results and knowledge review of the Tarim Basin, a hydrocarbon accumulation model in the Tarim Basin has been established and a transformation of exploration ideas and knowledge has been demonstrated. Buried hill structure model transformed to paleo-uplift (paleo-slope) karst fracture-cavity model. By analyzing the accumulation conditions and characteristics, a "paleo-uplift and paleo-slope karst fracture-cavity complex reservoir formation model" was established in the Tahe Oilfield providing a marine carbonate oil and gas accumulation model in the Tarim Basin. The discovery and expansion of the Shunbei oil and gas field is related to the establishment of the "super deep fault-karst complex accumulation model", which has achieved spatial expansion and an exploration breakthrough from the paleo-slope to the "forbidden area" in the lower location. Analysis of an ultra-deep fault-karst oil and gas reservoir provided the basis for a model of an uplift-slope + hinterland fault-karst of the platform basin in the Tarim Basin. The complete marine hydrocarbon accumulation model has enhanced the theory of marine carbonate oil and gas accumulation in China and pointed out a direction for future oil and gas exploration.

Keywords

• accumulation model
• exploration direction
• basin area
• tarim basin