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

• 地质勘探 • 上一篇    下一篇

盐类物质对泥质烃源岩生排烃过程的影响

马中良1,2,郑伦举1,2,李志明1,2,秦建中1,2   

  1. 1. 中国石化油气成藏重点实验室,江苏无锡2141512. 中国石化石油勘探开发研究院无锡石油地质研究所,江苏无锡214151
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2013-02-01 发布日期:2013-02-01

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

摘要: 根据中国东部下第三系盐湖相沉积存在的地质实际,利用地层孔隙热压生排烃模拟仪开展了仿真地层条件下
的含盐和不含盐泥质烃源岩的生排烃模拟实验,通过对烃类产物的分析探讨了盐类物质参与烃源岩生排烃的过程。
研究表明:(1)盐类的存在加速了成烃演化,促进了石油和天然气的生成;(2)盐类的存在降低了对有机质的吸附能
力,加速了粘土转化和脱水过程,且盐层易解理,使烃源岩中微孔隙及孔缝发育,促进了油气的初次运移;(3)无盐泥
质源岩发育区虽然滞留大量的石油资源,但由于其岩石本身难压裂,对于商业化开采页岩油并无太大意义,到达过成
熟阶段后,可能是页岩气开采的有利区带。盐岩发育区虽然其整体演化过程中生成的油气易于排出,但在Ro=1.28%
时仍然滞留着20% 的石油资源,富含大量的盐类脆性矿物而低含粘土矿物,有利于产生裂缝,易于压裂,是页岩油藏
勘探的有利区带。

关键词: 盐类, 烃源岩, 热压模拟实验, 油气生成, 非常规油气资源

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