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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.1
- 수록면
- 201 - 211 (11page)
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초록· 키워드
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Using core, well logging, geological analysis, production, and test data, this study characterizes a method of well logging for identifying lithology, oil or water layers, and thickness of oil layers of tight sandstone reservoir in the Chang 7 member of the Upper Triassic Yanchang Formation, southwestern Ordos Basin, China. This reservoir consists of two rock types: fine sandstone and siltstone. The fine sandstone has distinct oil traces and flecks, which strongly indicate the presence of oil, and this rock is therefore the superior reservoir. The siltstone exhibits essentially no oil shows and thus is an unproductive layer. A method of density and neutron curve normalization and overlay was used to identify the tight fine sandstone, tight siltstone, mudstone, and shale. The criteria for identifying the tight fine sandstone are a natural gamma value of less than 93 API (American Petroleum Institute units) and a difference between the normalized curves exceeding 0.05. A resistivity-porosity plot was used to identify oil or water layers relatively effectively. The criteria for identifying the tight oil layers are (1) a resistivity exceeding 28 Ω·m and a porosity exceeding 9.5% or (2) a resistivity between 20 and 28 Ω·m, a porosity exceeding 9.5%, and an oil saturation exceeding 65%. Based on the lithologic identification via normalization and overlay of the density and neutron curves and the criteria for distinguishing the tight oil layers, the thickness of the tight fine sandstone oil reservoir was accurately determined by overlaying the normalized difference curve on the resistivity curve.
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참고문헌 (21)
참고문헌 신청
Chen, S. J. / 2014 / Factors controlling oiliness of Jurassic Lianggaoshan tight sands in central Sichun Basin, SW China / Petroleum Exploration and Development 41:421~427
Cui, J. W. / 2013 / Heterogeneity and lower oily limits for tight sandstones: a case study on Chang 7 oil layers the Yanchang Formation, Ordos Basin / Acta Petrolei Sinica 34:877~882
Hill, R. J. / 2007 / Modelling of gas generationfrom the Barnett shale, Fort Worth Basin, Texas / American Association of Petroleum Geologists Bulletin 91:501~521
Hu, H. Y. / 2015 / Key elements controlling oil accumulation within the tight sandstones / Journal of Earth Science 26:328~342
Jia, C. Z. / 2012 / Assessment criteria, main types, basic features and resource prospects of the tight oil in china / Acta Petrolei Sinica 33:343~350
Cui, J. W. / 2013 / Heterogeneity and lower oily limits for tight sandstones: a case study on Chang 7 oil layers the Yanchang Formation, Ordos Basin / Acta Petrolei Sinica 34:877~882
Hill, R. J. / 2007 / Modelling of gas generationfrom the Barnett shale, Fort Worth Basin, Texas / American Association of Petroleum Geologists Bulletin 91:501~521
Hu, H. Y. / 2015 / Key elements controlling oil accumulation within the tight sandstones / Journal of Earth Science 26:328~342
Jia, C. Z. / 2012 / Assessment criteria, main types, basic features and resource prospects of the tight oil in china / Acta Petrolei Sinica 33:343~350
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