西南石油大学学报(自然科学版) ›› 2012, Vol. 34 ›› Issue (5): 65-70.

• 地质勘探 • Previous Articles     Next Articles

Application of Hydrocarbon Expulsion Threshold in Studying theHydrocarbon Generation and Expulsion

Fan Bojiang1, Pang Xiongqi2, Shi Liang3   

  1. 1. Research Institute of Shaanxi Yanchang Petroleum（Group）Co. Ltd.，Xi’an，Shaanxi 710075，China2. State Key Laboratory of Petroleum Resource and Prospecting，China University of Petroleum（Beijing），Changping，Beijing 102249，China3. College of Mechanical and Transportation Engineering，China University of Petroleum（Beijing），Changping，Beijing 102249，China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-10-01 Published:2012-10-01

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Abstract: There has been disagreement about the judgment criterion of source rock for a long time. The concept of hydrocarbon
expulsion threshold was used to identify the hydrocarbon expulsion source rock in our study on the hydrocarbon
generation/expulsion quantity and the hydrocarbon generation/expulsion characteristics in this paper. Thus，the hydrocarbon
expulsion history and hydrocarbon expulsion process can be acquired. The first step of the study is to judge the hydrocarbon
expulsion source rock by using the source rock’s quality judgment plate；the second is to study the hydrocarbon expulsion
characteristics by using the quantitative model. The studying on the Es3 source rock，Gaoliu Unit，Jidong Exploration Zone
indicates that，the Ro corresponding to the hydrocarbon expulsion threshold is 0.78%. The largest hydrocarbon expulsion intensity
is larger than 450.00×104 t/km2，and the average hydrocarbon expulsion intensity is 315.67×104 t/km2. The hydrocarbon
expulsion peak period is Guantao period，and the total hydrocarbon expulsion quantity in the studying area is 2.08×108 t.

Key words: source rock quality, hydrocarbon expulsion, hydrocarbon expulsion threshold, quantitative analysis