Application of logging recognition technique in natural fracture in Z oilfield
Zhao Jun-long1, Li Zhao-ming2, Li Jian-ting2, Wang Sheng-hua2, Li Gan1
1. School of Petroleum Resources, Xi'an University of Petroleum Xi'an City, Shaanxi Province, 710065, China;
2. 2nd Production Plant, Changqing Oilfield Branch of Petrochina, Qingcheng City, Shaanxi Province, 745100, China
Abstract：In order to accurately evaluate and predict the influence of fracture in Z oilfield,the integrated studies were conducted based on the field datasets in the oilfield and the fracture research in both home and abroad,deposition tectonic setting and stress field background study were the basis and the geological data,core data,well logging data,production performance and other data were integratedly utilized in the studies.For the few cored wells the detailed studies were conducted,the natural fracture identification criterion for sand reservoir with ultra-low permeability was established,the proper natural fracture identification method was optimized,then based on single well fracture identification,the plane distribution law for the fractures was predicted by applying several prediction methods.The study results show that the natural fractures are fully developed in the reservoirs of Z oilfield,large angle fractures are the dominant,the fracture identification methods which fit the oilfield mainly include reconstructed FRAC1 fracture index parameter method,well logging curve R/S variable scale analysis method and permeability anomaly analysis method and so on.The plane distribution of the fractures in the oilfield is in intermittent zonal distribution form,the distribution direction for the fractures in the south is near SN direction,the fractures in the middle distribute is NNE direction,and the fractures in the north distribute is NEE direction,in the fracture development zone the permabilities vary greatly.
赵军龙, 李兆明, 李建霆, 王胜华, 李甘. Z油田天然裂缝测录井识别技术应用[J]. 石油地球物理勘探, 2010, 45(4): 584-591.
Zhao Jun-long, Li Zhao-ming, Li Jian-ting, Wang Sheng-hua, Li Gan. Application of logging recognition technique in natural fracture in Z oilfield. OGP, 2010, 45(4): 584-591.
