A METHOD FOR CALCULATING PRIMARY POROSITY OF SANDSTONE
YANG Ning1,3, WANG Gui-wen1,2, LAI Jin1, LI Jian-lun1, RAN Ye1, ZHANG Xiao-tao1, XU-Bo1, WANG-Kai1
1. College of Geosciences, China University of Petroleum, Beijing 102249, China;
2. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China;
3. CNPC Greatwall Drilling Company, Beijing 100101, China
The research on the evolution of sandstone's porosity is the indispensable basis for the analysis of buried history, the palaeotectonic reconstruction and the prediction of palaeo-formation pressure, and accurate acquirement of the primary porosity is the basic prerequisite to achieve the aim. The common method is the empirical relationship created by Beard using sorting coefficient, or the reading of the R.Sneider chart to get porosity and permeability relying on the coring experiment. Based on an analysis of the stress state of sediment particles, the authors set up the primary porosity calculation model with the average particle size ranges as the parameters. Using this model, the authors processed the reservoir sandstone of Chang 8 formation of the Triassic Yanchang Formation in Jiyuan area of Ordos Basin and Bashijiqike Formation in Dabei area of Tarim Basin. A comparison with the previous research results in corresponding areas has verified the reliability of the models.
杨宁, 王贵文, 赖锦, 李鉴伦, 冉冶, 张晓涛, 徐博, 王凯. 一种砂岩原始孔隙度计算方法[J]. 物探与化探, 2013, 37(4): 726-729.
YANG Ning, WANG Gui-wen, LAI Jin, LI Jian-lun, RAN Ye, ZHANG Xiao-tao, XU-Bo, WANG-Kai. A METHOD FOR CALCULATING PRIMARY POROSITY OF SANDSTONE. Geophysical and Geochemical Exploration, 2013, 37(4): 726-729.
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