Quantitative Evaluation of the Main Control Factors of Carboniferous Volcanic Reservoirs in the Eastern Margin of Chepaizi Uplift, Junggar Basin, China(PDF)
《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]
- Issue:
- 2018年第04期
- Page:
- 462-472
- Research Field:
- 基础地质与矿产地质
- Publishing date:
Info
- Title:
- Quantitative Evaluation of the Main Control Factors of Carboniferous Volcanic Reservoirs in the Eastern Margin of Chepaizi Uplift, Junggar Basin, China
- Author(s):
- WEI Jia-yi; MENG Fan-chao; LIN Hui-xi; SHI Hao-guo; XU You-de
- 1. School of Geosciences, China University of Petroleum, Qingdao 266580, Shandong, China; 2. Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, Shandong, China; 3. Exploration and Development Research Institute, Shengli Oilfield Company, SINOPEC, Dongying 257000, Shandong, China
- Keywords:
- volcanic reservoir; main control factor; quantitative evaluation; gray correlation analysis; comprehensive evaluation index; Carboniferous; Chepaizi uplift; Junggar Basin
- PACS:
- P618.13；TE121.1
- DOI:
- -
- Abstract:
- Taking Carboniferous volcanic reservoirs in the eastern margin of Chepaizi uplift, Junggar Basin as research object, the main control factors of the volcanic reservoirs were analyzed by various types of data, including logging, drilling, testing for oil, cores, cuttings and thin sections. The gray correlation analysis was applied to quantitatively evaluate the main control factors of reservoirs; the cumulative oil and gas production was selected as the parent factor, and the main control factors which have high correlation with the cumulative oil and gas production were selected as the sub factors to measure the quality of the volcanic reservoirs. The results show that the main control factors affecting the formation of Carboniferous volcanic reservoirs in Chepaizi uplift include lithology, lithofacies, fracture development, weathering-leaching; by calculating the weight coefficient of each evaluation parameter, the weight coefficient of weathering-leaching is the biggest with the value of 0.271, followed by fracture density with the weight coefficient of 0.261, and the weight coefficients of the lithology and lithofacies are the smallest with the values of 0.222 and 0.247, respectively; the volcanic reservoirs in the study area can be generally divided into two different types based on comprehensive evaluation index (IREI) of reservoirs, as for type Ⅰ, the IREI is greater than 0.6, and as for type Ⅱ, the IREI ranges from 0.3 to 0.6. The reservoir quantitative evaluation criteria were used to verify the comprehensive classification and evaluation of single well reservoirs, the results coincide with the actual cumulative oil and gas production rate as high as 90%; the quantitative evaluation classification results of single well reservoirs and actual cumulative oil and gas production are in good agreement with the favorable reservoir plane distribution prediction in the study area, the evaluation results are reliable.
Last Update: 2018-07-27