| 珠江口盆地惠州凹陷古近系规模性砂砾岩储层凝灰质成因及其油气地质意义 |
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| 引用本文： | 田立新.珠江口盆地惠州凹陷古近系规模性砂砾岩储层凝灰质成因及其油气地质意义[J].地球科学,2022,47(2):452-463. |
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| 作者姓名： | 田立新 |
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| 作者单位： | 中海石油(中国)有限公司深圳分公司, 广东深圳 518067 |
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| 基金项目： | 中海石油(中国)有限公司生产科研项目 |
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| 摘 要： | 随着全球能源需求日益增长,砂砾岩油气藏研究逐步深入,新疆准噶尔盆地玛湖大型砾岩油藏、渤海海域渤中19-6大型整装凝析气田及珠江口盆地H6-6构造超百亿方天然气勘探获重大发现,使得砂砾岩体成为油气勘探新领域.基于镜下薄片、扫描电镜与振幅?方差体地震属性分级?拾取?融合分析,综合表征砂砾岩储层中凝灰质性质、分布、来源及其对...
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| 关 键 词： | H6-6构造 古近系 砂砾岩储层 凝灰质岩层 火山机构 油气地质 |
| 收稿时间： | 2020-12-06 |
Genesis Mechanism of Tuffaceous Materials in Paleogene Large-Scale Glutenite Reservoirs and Implications for Hydrocarbon Exploration in the Huizhou Depression,Pearl River Mouth Basin |
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| Tian Lixin.Genesis Mechanism of Tuffaceous Materials in Paleogene Large-Scale Glutenite Reservoirs and Implications for Hydrocarbon Exploration in the Huizhou Depression,Pearl River Mouth Basin[J].Earth Science-Journal of China University of Geosciences,2022,47(2):452-463. |
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| Authors: | Tian Lixin |
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| Abstract: | With increasing of the global energy consumption, the study of glutenite oil and gas reservoirs have been gradually deepened. Especially, significant discoveries of conglomeratic reservoirs have been made in the Mahu area, Junggar basin of Xinjiang, integrated condensate gas field of BZ19-6 in the offshore Bohai Bay Basin, and discovered over 10 billion cubic meters of gas in the H6-6 structure, Pearl River Mouth Basin, which making the glutenite reservoirs have become a new field of oil and gas exploration.The properties, distribution and sources of volcanic tuff in the glutenite reservoir and their effects on the reservoir physical properties and oil and gas properties were comprehensively characterized based on the thin section, scanning electron microscope and amplitude-variance seismic attribute grading-picking-fusion analysis. The results show that the dispersed distribution of volcanic tuff is the inherent reason of the Paleogene large-scale glutenite reservoir anomaly in the H6-6 structure. There are 3 craters in the Wenchang and Enping formations. The Wenchang volcanic activities continued to be intensive and were represented by magma overflow or explosive eruption of mafic and intermediate-felsic compositions. Most of the tuffaceous compositions are presented as the relatively coarse rock-fragments with the lack of fine-grained tuff filling pores. The Enping volcanic period was weakened with the intermediate-felsic magmatic explosive eruption. The intergranular pores are mostly filled with fine-grained tuffaceous compositions, which had obvious damage to the reservoir of oil and gas. As a whole, low tuffaceous contents are good for the preservation of reservoir pores. Systematic analysis of the genetic mechanism of the tuffaceous compositions in the glutenite reservoir is of theoretical significance to reveal the formation and evolution of the Paleogene Pearl River Mouth Basin, and it can also meet the exploration demands of large and medium-sized glutenite oil and gas reservoirs. |
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