西南石油大学学报(自然科学版) ›› 2013, Vol. 35 ›› Issue (1): 43-51.

• 地质勘探 • Previous Articles     Next Articles

The Effect of Salts on Hydrocarbon Generation and Expulsion ofArgillaceous Source Rock

Ma Zhongliang1,2, Zheng Lunju1,2, Li Zhiming1,2, Qin Jianzhong1,2   

  1. 1. Sinopec Key Laboratory of Petroleum Accumulation Mechanisms,Wuxi,Jiangsu 214151,China2. Wuxi Research Institute of Petroleum Geology,Wuxi,Jiangsu 214151,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2013-02-01 Published:2013-02-01

Abstract: According to the presence of aalt lake sediments of the Tertiary in the east of China,we make use of hydrocarbon
generation and expulsion of pore hot simulation instrument to carry out the simulation under the conditions of formation of
salt and no salt argillaceous source rock hydrocarbon generation and expulsion simulation experiments,through the analysis
of hydrocarbon products of the salts in hydrocarbon source rocks in the process of hydrocarbon generation and expulsion. The
results have shown that:(1)the presence of salts accelerated the evolution of hydrocarbon generation,and promoted oil and gas
generation.(2)the presence of salt reduces the adsorption capacity of organic matter,accelerated the process of transformation
and dehydration of clay,and promoted the initial operation of oil and gas shift easy cleavage and other reasons,the source
rocks in the development of micro-pores and apertures in source rocks.(3)Although there exist a large number of stranded
oil resources,salt-free zones in shale source rocks has little value of commercial exploitation because of the difficulties in
fracturing. But they may be favorable of shale rock gas exploitation when reaching maturing. Although it is easy to discharge
oil and gas generated in the process of evolution of salt rocks,20% of oil resources were still stuck,when Ro=1.28%a large
number of salts rich in minerals and low brittleness with clay minerals,are conducive to creating cracks,and are easy for
fracturing,which makes salt rock areas favorable shale zones for reservoir exploration.

Key words: salt, source rock, thermocompression simulation experiment, hydrocarbon generation, unconventional oil andgas resources