Abstract:

The carbonate rock reservoir of Yijianfang Formation is vug-fracture one in TPT oilfield in Xinjiang,in the system,there is stronger heterogeneity in vertical and horizontal direction.Seeking the vugs in the reservoir is an effective approach to improve prospecting successful rate.In this paper,one kind of new vug detecting method is put forward,i.e,cumulative energy difference,seismic forward modeling is carried out by building the theory geology model of vug system,according to application effect,the developing location and characteristic of vugs in reservoir are successfully recognized and inspected.3D seismic data of TPT oilfield is dealt with cumulative energy difference,demonstrating that detecting and actual results fit very much through comparing the section through well with drilling production,confirming the method is effective and accurate.vug developing zone of Yijianfang Formation is recognized by adopting the method to pick up the seismic prediction values,the exploration and exploitation have active guiding significance to later stage.

Key words: carbonate rock reservoir, cave system, forward modeling, cumulative energy difference, cave detection