碳酸盐岩孔洞型储层分层次储集空间表征——以鄂尔多斯盆地大牛地中奥陶统马家沟组马五<sub>7</sub>为例

丁晓琪; 刘鑫; 祁壮壮; 张威; 刘四洪

doi:10.11781/sysydz202104689

碳酸盐岩孔洞型储层分层次储集空间表征——以鄂尔多斯盆地大牛地中奥陶统马家沟组马五₇为例

doi: 10.11781/sysydz202104689

1.
成都理工大学能源学院, 成都 610059
2.
中国石化华北油气分公司, 郑州 450006

基金项目:

国家油气重大专项 2017ZX05005-001-010

中国石化科技部攻关项目 P20043-2

高等教育人才培养质量和教学改革重点项目 JG182017

详细信息

作者简介:
丁晓琪(1981-), 男, 博士, 副教授, 从事碳酸盐岩储层地质学研究。E-mail: xiaoqiding@qq.com

中图分类号: TE122.24
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出版历程
- 收稿日期: 2020-09-01
- 修回日期: 2021-06-28
- 刊出日期: 2021-07-28

Reservoir space characterization of vuggy carbonate reservoirs with multiple scales: a case study of Ma 5-7 interval, Middle Ordovician Majiagou Formation, Daniudi area, Ordos Basin

1.
Energy College, Chengdu University of Technology, Chengdu, Sichuan 610059, China
2.
North China Company, SINOPEC, Zhengzhou, Henan 450006, China

摘要

摘要: 碳酸盐岩具有多尺度、多成因的储集空间，储集空间和储集物性的表征是难点。鄂尔多斯盆地大牛地奥陶系马家沟组马五₇储层发育毫米—微米—纳米级储集空间，为研究其储集空间和储集物性，分层次、多尺度对该储集空间进行了表征，并结合测井曲线，建立了孔、洞的计算模型。研究表明：①对于发育多尺度储集空间的碳酸盐岩储层，采用岩心拓片提取溶蚀孔洞（>1 mm）、铸体薄片提取晶间孔（>2 μm）、氩离子抛光—扫描电镜进行亚微米—纳米孔（< 2 μm）研究相结合，可以较准确地表征其储集空间；②在多尺度储集空间表征的基础上，对声波孔隙度和中子—密度孔隙度进行约束，可以建立对应的晶间孔孔隙度计算模型和溶蚀孔洞孔隙度计算模型，该模型具有更高的计算精度。
- 孔洞型储层 /
- 储集空间 /
- 碳酸盐岩 /
- 马家沟组 /
- 奥陶系 /
- 大牛地气田 /
- 鄂尔多斯盆地
Abstract: The reservoir space of carbonate rocks is of multiple scales and genesis mechanisms, and it is difficult to accurately demonstrate the reservoir space as well as physical properties.Millimeter-, micro- and nano-scale reservoir spaces were all developed in the Ma 5-7 interval (the 7th sub-member of the 5th member) of the Ordovician Majiagou Formation in Daniudi area, Ordos Basin. In order to study the storage space and physical properties, the storage space was characterized in layers at multiple scales, and combined with the approach of logging curves, a calculation model was established for the description of pores and caves.Several conclusions were made as follow. (1) For carbonate rock reservoirs with storage space of multiple scales, we can accurately describe their storage space by the means of core rubbing for dissolved pores (>1 mm), case thin section for intercrystalline pores (>2 μm), and argon ion polishing-scanning electron microscope for submicron and nano pores (< 2 μm). (2) On the basis of multi-scale reservoir space characterization, the acoustic porosity and neutron-density porosity can be constrained, and the corresponding intercrystalline pore porosity calculation model and dissolved pore porosity calculation model can be established, which have higher calculation accuracy.
- vuggy reservoir /
- reservoir space /
- carbonate rock /
- Majiagou Formation /
- Ordovician /
- Daniudi gasfield /
- Ordos Basin

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图 1 鄂尔多斯盆地大牛地位置及前石炭纪古地质图

Figure 1. Location of Daniudigas field and paleogeologic map of pre-Carboniferous, Ordos Basin

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图 2 鄂尔多斯盆地大牛地大126井中奥陶统马家沟组马五₇地层柱状图

Figure 2. Stratigraphic column of Ma 5-7 interval of Middle Ordovician Majiagou Formation, well Da 126, Daniudi gas field, Ordos Basin

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图 3 鄂尔多斯盆地大牛地大124井中奥陶统马家沟组马五₇小层含铸模孔岩心照片、拓片图及孔径分布

vug为铸模孔
a.粉晶白云岩，3 150.15 m；b.图a的孔隙分布图；c.图a的铸模孔分布直方图；d.粉晶白云岩，3 152.8 m；e.图d的孔隙分布图；f.图d的铸模孔分布直方图；g.粉晶白云岩，3 153.1 m；h.图g的孔隙分布图；i.图g的铸模孔分布直方图；j.粉晶白云岩，3 153.28 m；k.图j的孔隙分布图；l.图j的铸模孔分布直方图；m.粉晶白云岩，3 153.9 m；n.图m的孔隙分布图；o.图m的铸模孔分布直方图

Figure 3. Core photographs, rubbing moldic pore and vuggy radii distribution of Ma 5-7 interval of Middle Ordovician Majiagou Formation, well Da 124, Daniudi gas field, Ordos Basin

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图 4 鄂尔多斯盆地大牛地大124井中奥陶统马家沟组马五₇小层白云岩显微照片、孔隙分布和孔径分布

vug为铸模孔；por为晶间孔a.粉晶白云岩，3 150.15 m；单偏光；b.图a的孔隙分布图；c.图a的晶间孔分布直方图；d.粉晶白云岩，3 152.80 m，单偏光；e.图d的孔隙分布图；f.图d的晶间孔分布直方图；g.粉晶白云岩，3 153.10 m，单偏光；h.图g的孔隙分布图；i.图g的晶间孔分布直方图；j.粉晶白云岩，3 153.28 m，单偏光；k.图j的孔隙分布图；l.图j的晶间孔分布直方图；m.粉晶白云岩，3 153.90 m，单偏光；n.图m的孔隙分布；o.图m的晶间孔分布直方图

Figure 4. Photomicrographs of crystalline dolomites, distribution of pores and pore radii of Ma 5-7 interval of Middle Ordovician Majiagou Formation, well Da 124, Daniudi gas field, Ordos Basin

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图 5 鄂尔多斯盆地大牛地中奥陶统马家沟组马五₇小层白云岩中纳米—亚微米级孔隙扫描电镜照片

b图为a图白色框内的放大(大124井，3 152.47 m)

Figure 5. SEM photomicrographs of nanometer- and sub-micrometer-pores in dolomites, Ma 5-7 interval of Middle Ordovician Majiagou Formation, Daniudi gas field, Ordos Basin

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图 6 鄂尔多斯盆地大牛地中奥陶统马家沟组马五₇小层白云岩孔隙度交会图版

Figure 6. Crossplots of dolomite porosities of Ma 5-7 interval of Middle Ordovician Majiagou Formation, Daniudi gas field, Ordos Basin

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图 7 鄂尔多斯盆地大牛地大124井测井解释孔隙度与实测孔隙度对比

Figure 7. Comparison of interpreted porosity of well logging and measured porosity of well Da 124, Daniudi gas field, Ordos Basin

下载: 全尺寸图片幻灯片

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