辫状河致密砂岩储层构型单元定量表征方法

doi:10.13278/j.cnki.jjuese.20170155

Abstract

Abstract: Aiming at the difficulty in obtaining the key parameters and the doubtful reliability of the existing quantitative characterization method for braided river reservoir architecture units, based on the theory of reservoir architecture on single braided channel width, a new method is proposed. Firstly, based on the analysis of single well reservoir architecture units, the horizontal distribution of coeval braided river channels is determined. Secondly, the single braided river channels are set up, and their width can be measured through connecting-well profiles perpendicular to the paleo-current direction. Thirdly, according to the new quantitative model, the width of braided water channel and the length and width of a complex channel bar are calculated. Lastly, in a single braided channel, the plane distribution of four-stage configuration units is determined, and then the compound channel bar is dissected in the dense well network area to determine the location and geometry of the single channel bar. The new method is applied to evaluate the scale of the reservoir architecture units of the braided river tight sandstone gas field of the 1-3 layer of the lower part of 8th member of the Xiashihezi Formation in the Su××EOR test area. It is shown that five single braided river channels are developed in the 1-3 layer of the 8th member within the width of 1 050 m-1 890 m, a braided channel width of 234 m to 435 m;the length and width of a compound channel bar are 1 931-3 569 m and 685-1 242 m respectively,while those of a single channel bars are 660-1 880 m and 310-1 030 m respectively.

Key words: quantitatively characterization method, reservoir architecture units, width of single braided river channel, braided river, tight sandstone gas, the lower part of 8th member of Xiashihezi Formation of Sulige gas field

CLC Number:

P618.13

Qu Xuejiao, Li Jiqiang, Zhang Ji, Zhao Zhongjun, Qi Zhilin, Luo Chao. Quantitative Characterization of Reservoir Architecture Units of Braided River Tight Sandstone Reservoirs[J].Journal of Jilin University(Earth Science Edition), 2018, 48(5): 1342-1352.

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Quantitative Characterization of Reservoir Architecture Units of Braided River Tight Sandstone Reservoirs

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