石油与天然气地质 ›› 2016, Vol. 37 ›› Issue (4): 538-545.doi: 10.11743/ogg20160410

• 油气地质 • 上一篇    下一篇

热解参数S1的轻烃与重烃校正及其意义——以渤海湾盆地大民屯凹陷E2s4(2)段为例

李进步1, 卢双舫1, 陈国辉1, 单俊峰2, 胡英杰2, 毛俊莉2, 薛海涛1, 王民1   

  1. 1. 中国石油大学(华东) 非常规油气与新能源研究院, 山东 青岛 266580;
    2. 中国石油 辽河油田分公司 勘探开发研究院, 辽宁 盘锦 124010
  • 收稿日期:2014-09-01 修回日期:2016-07-26 出版日期:2016-08-08 发布日期:2016-09-06
  • 第一作者简介:李进步(1989-),男,博士研究生,页岩油气与油气地球化学。E-mail:498891492@qq.com。
  • 基金项目:
    国家自然科学基金重点项目(41330313);国家科技重大专项(2011ZX05004-001)。

Correction of light and heavy hydrocarbon loss for residual hydrocarbon S1 and its significance to assessing resource potential of E2s4(2) member in Damintun Sag, Bohai Bay Basin

Li Jinbu1, Lu Shuangfang1, Chen Guohui1, Shan Junfeng2, Hu Yingjie2, Mao Junli2, Xue Haitao1, Wang Min1   

  1. 1. Research Institute of Unconventional Petroleum and Renewable Energy(RIUP & RE), China University of Petroleum(East China), Qingdao, Shandong 266580, China;
    2. PetroChina Exploration and Development Institute of Liaohe Oilfield, Panjin, Liaoning 124010, China
  • Received:2014-09-01 Revised:2016-07-26 Online:2016-08-08 Published:2016-09-06

摘要: 利用热解参数S1(游离烃含量)对页岩油进行资源评价时存在轻烃和重烃损失的现象,导致计算资源量偏小。针对重烃损失,将相同泥页岩样品经抽提前、后热解实验所得的S2(热解含量)进行对比,二者之差即为S1损失的重烃含量。针对轻烃损失,基于未熟泥页岩样品Rock-Eval和PY-GC实验以及对原油进行的金管实验,根据化学动力学原理求取各动力学参数,结合Easy Ro模型计算出不同成熟度时生成的C6-13与C13+的比值,将此值作为烃源岩内残留的C6-13与C13+比值,并在经重烃恢复之后的S1基础上进行轻烃恢复。使用轻烃与重烃恢复前、后的S1作为页岩油资源评价参数,在资源量计算方面差别较大。以渤海湾盆地大民屯凹陷E2s4(2)段为例,其恢复前资源量为2.26×108t,恢复后资源量为6.47×108t,恢复后资源量为恢复前的2.86倍。因此在利用S1对页岩油进行资源评价时,对S1的轻烃和重烃恢复具有重要意义。

关键词: 热解参数S1, 轻烃与重烃校正, 页岩油, 资源评价, 大民屯凹陷, 渤海湾盆地

Abstract: Free hydrocarbon content(S1)is a frequently-used pyrolytic parameter in assessment of shale oil resource.However,light and heavy hydrocarbon losing during the process often yields result on the low side.For heavy hydrocarbon loss,we compared pyrolysed hydrocarbon content(S2)obtained through pyrolytic experiment before and after extraction of samples to estimate the lost heavy hydrocarbon of S1.For light hydrocarbon loss,we carried out Rock-Eval and PY-GC experiments on immature shale samples and gold tube experiment on crude samples to calculate the ratio of C6-13/C13+ in different stages of maturity according to chemical dynamic theory and Easy Ro model,then took this ratio as the ratio of residual C6-13/C13+ in shale,and finally performed correction of light hydrocarbon lose based on S1 obtained after heavy hydrocarbon correction.Using the corrected parameter in assessment of shale oil resource made a great difference.Taking the E2s4(2) member in Damintun Sag,Bohai Bay Basin as an example,the result is only 22.6 billion tons without correction but 2.86 times higher (64.7 billion tons) after the corrected parameter was used.It is therefore suggested that correction of light and heavy hydrocarbon loss for residual hydrocarbon S1 during assessment of shale oil resources is necessary.

Key words: free hydrocarbon content(S1), light and heavy hydrocarbon correction, shale oil, resource assessment, Damintun Sag, Bohai Bay Basin

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