Comparison of Thermal Simulation Product Characteristics of Mudstone and Argillaceous Dolomite from Fengcheng Formation in Mahu Sag of Junggar Basin(PDF)
《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]
- Issue:
- 2016年第01期
- Page:
- 93-103
- Research Field:
- 基础地质与矿产地质
- Publishing date:
Info
- Title:
- Comparison of Thermal Simulation Product Characteristics of Mudstone and Argillaceous Dolomite from Fengcheng Formation in Mahu Sag of Junggar Basin
- Author(s):
- GAO Gang; XIANG Bao-li; DU Peng-yan; MA Wan-yun; CHEN Zhe-long; REN Jiang-ling; LIU Guang-di
- 1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China; 2. Experimental Testing Institute, Xinjiang Oilfield Company, PetroChina, Karamay 834000, Xinjiang, China
- Keywords:
- argillaceous dolomite; mudstone; gaseous product; liquid product; thermal simulation; expelled oil; Fengcheng Formation; Mahu sag
- PACS:
- TE122；P618.130.1
- DOI:
- -
- Abstract:
- Based on contrast of composition and yield of gaseous and liquid thermal simulation experiment products of mudstone and argillaceous dolomite from Fengcheng Formation in Mahu sag, Junggar Basin, the variation features of the liquid and gaseous products with simulation temperature increasing were discussed. The results show that the relative content of thermal simulation gaseous hydrocarbon increases with the rise of simulation temperature, and the non-hydrocarbon’s decreases; the content of CO2 of argillaceous dolomite is less than that of mudstone, and the contents of other gaseous components are opposite; with the rise of simulation temperature, gas product yields gradually increase, and the temperature corresponding to the oil generation peak is 330 ℃-350 ℃, which is lower than the temperature simulated by dry thermal simulation and is closer to the geological condition; more carbonate in hydrocarbon source rock is advantageous to oil generation; CO2 is generated mainly by thermal degradation of organic matter and a little by thermal cracking of carbonate in experimental conditions; carbon isotope compositions of gaseous hydrocarbons have lower variation extent and show the features of sapropel type gas; the main peak carbon number and relative content of high carbon number hydrocarbon for n-alkanes in expelled oil and residual oil decrease with the simulation temperature increasing; the biomarker parameters for expelled oil and residual oil have certain change, which should be taken into consideration in oil-source contrast application.
Last Update: 2016-01-30