Seismic identification and controlling factors on karsted carbonate reservoir for the Yijianfang Formation of Ordovician in Hanikatam area of Tarim Basin
Ke Weili1, Zhang Guangya1, Pan Wenqing2, Zhang Lei1, Zhang Renhuan3
1 Research Institute of Petroleum Exploration & Development,PetroChina,Beijing 100083,China
2 Research Institute of Petroleum Exploration & Development,PetroChina Tarim Oilfield Company,Korla 841000,China
3 Halliburton(China)Energy Service Limited Co.,Beijing 100020
Located on the west monocline of Ordovician buried hill anticline within Lunnan low uplift of the northern uplift,Tarim Basin,the karsted carbonate reservoir of Ordovician Yijianfang Formation of Hanikatam area has many special features like complicated forming factors,strong anisotropy,difficulties on identification,etc.The detailed distribution rules of cave-hole and fracture reservoir of Yijianfang Formation are summarized in this research using special techniques like separated time-window information extraction and Fault Fracture Atttribute(FFA) fracture identification,based on current well-drilling data and seismic interpretation result and guided by research achievement from modern karsted carbonate theories. Using special seismic techniques of stratigraphy CT scanning on palaeochannel,palaeotopography restoration and small fault identification based on Structure Cube volume using optimized mathematics methods,it reveals that the favorite controlling factors on karsted carbonate reservoir development could be high palaeotopography,rich water system and well development of small faults.From the research,it could be concluded that facing on current difficulties on karsted carbonate reservoir exploration,modern karsted carbonate theories,together with well and seismic reflection characteristics and applying all kinds of suitable seismic methods can help to identify different types of karsted carbonate reservoir and carry out effective analysis on controlling factors on such reservoir.
Ke Weili,Zhang Guangya,Pan Wenqing et al. Seismic identification and controlling factors on karsted carbonate reservoir for the Yijianfang Formation of Ordovician in Hanikatam area of Tarim Basin[J]. JOPC, 2014, 16(1): 125-132.
