烃源岩有限空间油气生排模拟及其意义

李志明; 郑伦举; 马中良; 徐二社; 余晓露; 靳广兴; 慕小水

doi:10.11781/sysydz201105447

烃源岩有限空间油气生排模拟及其意义

doi: 10.11781/sysydz201105447

1.
中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所, 江苏无锡, 214151
2. 中国石油化工股份有限公司中原油田分公司勘探开发科学研究院, 河南濮阳, 457001

基金项目: 中国石油化工股份有限公司科学技术研究开发项目(P08060)资助

详细信息

作者简介:
李志明(1968- ),男,博士,高级工程师,从事地球化学研究与石油地质综合评价.E-mail:mqzhml@sohu.com.

中图分类号: TE122.1
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出版历程
- 收稿日期: 2011-05-09
- 修回日期: 2011-08-05
- 刊出日期: 2011-10-28

Simulation of source rock for hydrocarbon generation and expulsion in finite space and its significance

1.
Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214151, China
2. Exploration and Development Scientific Research Institute, Zhongyuan Oil field Company, SINOPEC, Puyang, He'nan 457001, China

摘要

摘要: 利用DK-Ⅱ型地层孔隙热压生排烃模拟实验仪,对东濮凹陷沙三2亚段烃源岩开展烃源岩有限空间油气生排模拟研究,结果揭示烃源岩的生排烃演化呈现出4个阶段,即烃源岩在Ro值小于等于0.72%的阶段为相对缓慢生油阶段,生成的油无法排出;R_o值介于0.72%～0.80%之间的阶段为烃源岩快速生油阶段,但生成的油仍主要残留于烃源岩中;在R_o值为0.80%～1.00%时干酪根生油已结束或受到抑制,主要表现为大分子"油"向小分子"油"转化,该阶段油可以排运在烃源岩上、下邻接的砂岩层以及烃源岩表面及裂缝内,这为东濮凹陷及其他盆地或凹陷在以烃源岩为主体的发育带寻找非常规油气藏提供了依据;在R_o值大于1.00%时主要进入油裂解成气阶段,但即使在R_o为2.0%甚至2.4%时,生成的油也没有全部裂解成甲烷气,主要还是以油的形式存在,启示可以打破传统认识在更深的层位寻找石油。
- 有限空间 /
- 油气生排模拟 /
- 烃源岩 /
- 石油地质意义
Abstract: Simulation of source rock for hydrocarbon generation and expulsion in finite space has been carried out with samples from the Es²₃ sub-section of the Dongpu sag using the hydrocarbon generation and expulsion simulation experimental instrument of type DK-Ⅱ with porosity,temperature and pressure under geological conditions.It has been concluded that the process of hydrocarbon generation and expulsion of source rock can be divided into 4 stages as follows.1)Ro≤0.72%,oil generates slowly and does not expel;2)0.72% R_o 0.80%,oil generates rapidly,but still remains in source rock;3)0.80% R_o 1.00%,oil generation from kerogen has finished or suppressed,and oil transfers from big molecular to small molecular.Oil migrates to and assemblages in the upper and lower adjacent sandstone as well as source rock surface and fracture,which may guide unconventional hydrocarbon exploration in source rock dominant belt in the Dongpu Sag or the other similar basins or sags;4)R_o 1.0%,oil cracks to gas;however,oil does not crack to CH₄ completely and mainly remains in oil even though R_o 2.0% or 2.4%.The studies suggest that petroleum exploration can be carried out in deeper formation.
- finite space /
- simulation of hydrocarbon generation and expulsion /
- source rock /
- petroleum geological significance

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参考文献(15)

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