[1]丁雪峰,康锐,韩会平,等.鄂尔多斯盆地东部上古生界盒8段致密砂岩天然气成藏[J].西安科技大学学报,2014,(04):426-432.[doi:10.13800/j.cnki.xakjdxxb.2014.0409]
 DING Xue-feng,KANG Rui,HAN Hui-ping,et al.Tight sand gas accumulation for the 8th layer in eastern Ordos Basin[J].Journal of Xi'an University of Science and Technology,2014,(04):426-432.[doi:10.13800/j.cnki.xakjdxxb.2014.0409]
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鄂尔多斯盆地东部上古生界盒8段致密砂岩天然气成藏(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2014年04期
页码:
426-432
栏目:
出版日期:
2014-08-31

文章信息/Info

Title:
Tight sand gas accumulation for the 8th layer in eastern Ordos Basin
作者:
丁雪峰1康锐23韩会平1刘晓鹏23
1.中国石油长庆油田分公司,陕西 西安 710021; 2.中国石油长庆油田分公司 勘探开发研究院,陕西 西安 710021; 3.低渗透油气田勘探开发国家工程实验室,陕西 西安 710021
Author(s):
DING Xue-feng1KANG Rui23HAN Hui-ping1LIU Xiao-peng23
1.Changqing Oilfield Company,Petro China,Xi'an 710021,China; 2.Exploration and Development Research Institute,Changqing Oilfield Company,Petro China,Xi'an 710021,China; 3.Low Permeability Oil and Gas Field Exploration and Development of National Engineering Laboratory,Xi'an 710021,China
关键词:
致密砂岩 流体包裹体 气态烃包裹体 自生伊利石测年 天然气成藏
Keywords:
tight sandstone fluid inclusion gaseous hydrocarbon inclusions authigenic illite dating gas accumulation
分类号:
TE 121
DOI:
10.13800/j.cnki.xakjdxxb.2014.0409
文献标志码:
A
摘要:
为搞清鄂尔多斯盆地东部上古生界盒8段成藏与储层致密化关系,采用流体包裹体均一温度测试、激光拉曼光谱分析、伊利石测年分析对研究区盒8段的成藏时间进行了恢复,流体包裹体均一温度显示为双峰分布特征,主要分布在105~120 ℃之间和135~160 ℃之间,由捕获的包裹体内气体组分推算的R0介于0.6~1.0和大于1.2两个区间,伊利石测年分析显示峰值年龄分别为160和120 Ma,确定研究区主成藏时间为晚侏罗世和早白垩世。通过成岩作用及埋藏热演化史分析,三叠纪末时研究区盒8段储层孔隙度已小于12%,浮力无法克服毛管阻力,天然气将无法依靠浮力成藏,即储层已致密化。由此得出研究区气藏整体具有“先致密后成藏”的成藏特征,为在研究区寻找勘探有利区提供了理论基础。
Abstract:
In order to understand the relationship of densification and gas accumulation for the 8th Layer of Shihezi Formation in eastern Ordos Basin,using fluid inclusion homogenization temperature testing,laser Raman spectroscopy,and illite dating analysis of the study area,the 8th Layer of Shihezi Formation of the accumulation time were restored,homogenization temperature of fluid inclusions display a bimodal distribution,mainly in between 105~120 ℃ and 135~160 ℃,the captured gas component body wrapped Ro projections ranged from 0.6 to 1.0 and two intervals greater than 1.2,illite dating analysis showed that the peak ages of 160 and 120 Ma,identified in the study area in the main accumulation time of the Late Jurassic and Early Cretaceous.Again by burial diagenesis and thermal evolution history analysis,when the end of the Triassic,reservoir porosity is less than 12%,buoyancy less than capillary resistance,gas will not be able to rely on the buoyancy reservoir,the reservoir that has been densified.It follows the overall gas reservoirs in the study area has a reservoir characteristics of“dense earlier than the accumulation ”.This accumulation characteristics provides a theoretical basis for exploration of favorable areas.

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备注/Memo

备注/Memo:
基金项目:中国石油天然气股份公司科技重大专项项目(2011E-1301) 通讯作者:丁雪峰(1981-),男,江苏盐城人,硕士,工程师,E-mail:dxf116_cq@petrochina.com.cn
更新日期/Last Update: 2014-07-15