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- Title
鄂尔多斯盆地长7 段有机地球化学参数对致密油 动用效果的响应.
- Authors
丁晓楠; 牛小兵; 关平; 梁晓伟; 王晓雯; 冯胜斌; 尤源
- Abstract
The evaluation index and identification methods of the tight oil fracturing and oil-gas utilization differentiate with different areas. This study extracted pyrolysis parameters S1/ST,PI and saturated hydrocarbon molecular composition parameters ∑ C20-/∑ C21+,∑ tricyclic/∑ pentacyclic,Pr/nC17 and Ph/nC18 for comparison between the target horizon Chang 72 and neighboring horizons Chang 71 and Chang 73. The result indicates that there is an obvious variation in ∑ C20-/∑ C21+ and ∑ tricyclic /∑ pentacyclic. Meanwhile,Pr/nC17 and Ph/nC18 sensitively reflect the difference in percolation characteristics of linear and branched alkane. The above organic geochemical parameters are consistently conducted as follows:the relative content of light components with simple structure is significantly reduced in the target layer. Collaborative analysis of multiple organic geochemical parameters showed that the dense oil of the target horizon(Chang 72)was used preferentially,but it is not used much. This study believes that the characteristics of the organic geochemical parameters of tight reservoirs can provide a basis for the fine identification of the use of tight oil.
- Subjects
ALKANES; ORGANIC geochemistry; PERCOLATION; PETROLEUM; RESERVOIRS
- Publication
Natural Gas Geoscience, 2019, Vol 30, Issue 10, p1487
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2019.05.003