T2—Pc二维核磁共振岩心测试技术与应用

陈瑶; 张宫; 郑国庆; 彭庆; 覃莹瑶

doi:10.11781/sysydz202103549

T₂—P_c二维核磁共振岩心测试技术与应用

doi: 10.11781/sysydz202103549

陈瑶^1,,
张宫^1, ,,
郑国庆²,
彭庆³,
覃莹瑶¹

1.
长江大学油气资源与勘探技术教育部重点实验室, 武汉 430100
2.
中国石油新疆油田分公司勘探开发研究院, 新疆克拉玛依 834000
3.
中国石油新疆油田分公司陆梁油田作业区, 新疆克拉玛依 834000

基金项目:

湖北省教育厅科学研究计划项目 Q20181320

详细信息

作者简介:
陈瑶(1998-), 女, 硕士研究生, 从事超低渗岩心核磁实验与渗透率方法研究。E-mail: chenyao_sc@163.com

通讯作者:
张宫(1987-), 男, 博士, 讲师, 从事核磁共振测井方法与软件开发研究。E-mail: zhanggong@yangtzeu.edu.cn

中图分类号: TE135
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出版历程
- 收稿日期: 2020-05-10
- 修回日期: 2020-07-08
- 刊出日期: 2021-05-28

Core testing technology with T₂-P_c two-dimensional nuclear magnetic resonance and its application

1.
Key Laboratory of Exploration Technologies for Oil and Gas Resources of Ministry of Education, Yangtze University, Wuhan, Hubei 430100, China
2.
Exploration and Development Research Institute, Xinjiang Oilfield, CNPC, Karamay, Xinjiang 834000, China
3.
Luliang Oilfield Operation Area, Xinjiang Oilfield, CNPC, Karamay, Xinjiang 834000, China

摘要

摘要: 作为一种无损、高效、非侵入式的检测手段，核磁共振技术一直在油气岩心分析中发挥着重要作用。但传统核磁共振（NMR）检测结果（T₂谱）反映的是岩石孔隙的大小分布特征，孔隙的连通性无法直接被表征。通过对实验流程和数据处理方法的改进，在标准核磁T₂谱的基础上，增加毛管压力（P_c）维度，得到T₂—P_c二维核磁实验图谱，从另一个视角解决了核磁实验不能反映孔隙连通性的问题。实际应用表明，T₂—P_c二维核磁实验不但能够对储层连通性进行直观评价，也可以得到不同生产压差下的束缚水饱和度，从而为油气勘探开发提供更多储层信息。
- T₂谱 /
- 毛管压力 /
- 二维核磁共振 /
- 束缚水饱和度
Abstract: As a non-destructive, efficient and non-invasive detection method, nuclear magnetic resonance (NMR) technology has always played an important role in the analysis of oil and gas cores, but the traditional nuclear magnetic resonance detection results (T₂ spectrum) only reflect the size distribution characteristics of rock pores, while the connectivity of pores cannot be directly characterized. Through the improvement of experimental procedures and data processing methods of the standard nuclear magnetic T₂ spectrum, the capillary pressure dimension is added in to obtain the T₂-P_c two-dimensional nuclear magnetic experiment spectrum, which solves the problem that the nuclear magnetic experiment cannot reflect the pore connectivity. Practical application shows that the T₂-P_c two-dimensional nuclear magnetic experiment can not only intuitively evaluate reservoir connectivity, but also obtain bound water saturation under different production pressure differentials, thus providing more reservoir information for oil and gas exploration and development.
- T₂ spectrum /
- capillary pressure /
- 2D NMR /
- bound water saturation

HTML全文

图 1 传统核磁共振T₂谱局限性

Figure 1. Limitations of traditional NMR T₂ spectrums

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图 2 毛管压力曲线局限性

Figure 2. Limitations of capillary pressure curves

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图 3 传统核磁共振T₂测试实验结果

Figure 3. Traditional NMR T₂ test results

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图 4 不同离心力驱替后T₂谱

Figure 4. T₂ spectrums after different centrifugal force displacements

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图 5 T₂—P_c二维谱成图方法

Figure 5. Mapping method of T₂-P_c two-dimensional spectrum

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图 6 T₂SDD出现负值

Figure 6. Negative values of T₂SDD

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图 7 差分回波反演法

Figure 7. Differential echo inversion

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图 8 数值模拟所得结果

Figure 8. Results of numerical simulation

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图 9 模拟采集的回波信号

Figure 9. Acquisition of echo signal by simulation

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图 10 T₂SDD处理结果

Figure 10. T₂SDD processing results

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图 11 DEI处理结果

Figure 11. DEI processing results

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图 12 岩心分析实验结果

Figure 12. Core experiment results

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表 1 某地区砂岩岩心参数

Table 1. Sandstone core porosity and permeability parameters in a field

编号	孔隙度/%	渗透率/(10^-3 μm²)	束缚水饱和度/%
1	18.85	5.970	36.13
2	9.63	0.188	45.98
3	9.08	0.603	33.92

下载: 导出CSV

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