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《Journal of Oil and Gas Technology》 2010-03
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Lithological Identification of Conglomerate Reservoirs Base on Decision Tree Method

LI Hong-qi,TAN Feng-qi(Faculty of Resources and Information Technology,China University of Petroleum,Beijing 102249,China;State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 102249,China)XU Chang-fu,WANG Xiao-guang,PENG Shou-chang(Research Institute of Petroleum Exploration and Development,Xinjiang Oilfield Company,PetroChina,Karamay 834000,Xinjiang,China)  
The characteristics of conglomerate reservoir were complicated reservoir lithology and logging response without regular changes because of the special depositional environment of close source,multi-drainage systems and rapidly changed,and accurate identification of lithology became focus and difficult to the adjustment and development of the conglomerate reservoirs.The conglomerate reservoir in Kexia Formation of Sixth District in Karamay Oilfield was taken as an object the method of decision tree was used to study thee sensitivity of 8 lithological logging curves,and three logging response values such as original formation resistivity,acoustic travel time and natural gamma were optimized as characteristic parameters for conglomerate lithology identification.The lithology identification model of decision tree was established with accuracy rate of 96.97% and good effect was achieved in the second oilfield adjustment and development of and evaluation of water flooded layers.The identification chartboard of conglomerate reservoir lithology is produced by using geophysical methods based on analysis results of decision tree.The effective combination of data mining methods with geophysical methods provides a new idea and a new method to solve complex problems in oilfield exploration and development.
【Fund】: 国家“十五”重大科技攻关项目(2001BA605A09)
【CateGory Index】: P618.13
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