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《Science & Technology Review》 2010-02
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Fine Geologic Modeling of Triassic Lower Oil Formation in the 1st Block of Tahe Oilfield

LIU Hongbo1,2, ZHOU Wen1, ZHENG Jun1, ZHANG Juan1 1. College of Energy Resources, Chengdu University of Technology, Chengdu 610059, China 2. Sichuan Water Conservancy Vocational College, Dujiangyan 611830, Sichuan Province, China  
The reservoir of the 1st block of Tahe Oilfield is one with a complicated fault system and edge-bottom water in the lower section of the lower oil formation. At present, the main problem is the breakthrough water in production wells. Water volume is increased too fast with over -declined oil volume. Production fluid lateral section of the horizontal wells sees abnormal features. The overall production level of reservoirs declines. The treatment is difficult to find in the high water stage, and it is not very effective to block water. All above factors pose a serious threat to reservoirs. Therefore, it is necessary to study geologic characteristics of edge -bottom water reservoirs with a 3D geologic model. Petrel software is used for the 3D geologic modeling of this block, with a full use of data related to drilling, seismic conditions, well log and stratigraphic correlation as well as interbed's explanation and poroperm curve. Among various stochastic models, a 3D geologic model is chosen, which is close to the actual geological conditions. The type, thickness and distribution of interbed are identified in 3D. It is concluded that the reservoir of the 1st block of Tahe Oilfield is controlled by fault and interbed, which may serve as a geological basis for further studies of water invasion patterns.
【CateGory Index】: P618.13
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