Characteristics of the Ordovician Carbonate Reservoir Beds in Tazhong Areas of Tarim Basin and Hydrocarbon Accumulation
LIU Luo-fu
WANG Wei-li
JIANG Zhen-xue
PANG Xiong-qi
YANG Hai-jun
Abstract：In order to further study the comparison of characteristics among different reservoir beds and their horizontal distribution features, basic characteristics of three sets of the Ordovician carbonate reservoir beds of Tazhong areas in Tarim Basin, Northwest China were described by collecting and processing plenty of existing data, including single-well test data of porosity and permeability, horizontal distribution of sedimentary facies, fracture distribution, thin-section observation, characteristics of oil and gas reservoirs. The results show that the main reservoir beds is of the fracture type. The linear relationship can not be found between porosity and permeability of different reservoir beds. The change of permeability is relatively larger and the changes in permeability is controlled by the development of fracture. Several issues related to reservoir bed and oil-gas accumulation were discussed based on the reservoir bed characteristics. The results indicate that the carbonate reservoir beds with good physical properties all distribute along the No. 1 slope break belt, and the sedimentary facies is a major fac- tor controlling physical properties of the carbonate reservoir bed. In Tazhong areas, the oil-gas distributions within Ordovician carbonate rocks closely related to reservoir bed type.
Keywords：carbonatereservoir bedOrdovicianhydrocarbon accumulationTazhong areas
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)