磨溪气田嘉陵江组二段陆表海台地高频层序发育特征及对储层的控制

doi:10.11743/ogg20160511

石油与天然气地质 ›› 2016, Vol. 37 ›› Issue (5): 713-720.doi: 10.11743/ogg20160511

磨溪气田嘉陵江组二段陆表海台地高频层序发育特征及对储层的控制

刘宏¹, 王高峰¹, 刘南³, 乔琳⁴, 丁伟⁴, 丁熊¹, 段宏臻⁵, 谭秀成¹

1. 西南石油大学地球科学与技术学院天然气地质四川省重点实验室, 四川成都 610500;
2. 西南石油大学中国石油碳酸盐岩储层重点实验室沉积与成藏分室, 四川成都 610500;
3. 中海石油(中国)有限公司深圳分公司, 广东广州510240;
4. 中国石油西南油气田分公司勘探事业部, 四川成都 610041;
5. 中国石油集团测井有限公司青海事业部, 甘肃敦煌 736202

收稿日期:2015-05-20 修回日期:2016-06-15 出版日期:2016-10-08 发布日期:2016-11-07
作者简介:刘宏(1981-),男,博士、副教授,碳酸盐岩储层地质学与地震地层学。E-mail:nd123@163.com。
基金资助:
国家自然科学基金项目（41472099）；中国石油科技创新基金项目（2015D-5006-0107）。

Characterization of high-frequency sequences in the epicontinental carbonate platform of Jia 2 member in Moxi gas field and its controls over reservoirs

Liu Hong¹, Wang Gaofeng¹, Liu Nan³, Qiao Lin⁴, Ding Wei⁴, Ding Xiong¹, Duan Hongzhen⁵, Tan Xiucheng¹

1. Sichuan Province Key Laboratory of Natural Gas Geology, School of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. PetroChina Deposition and Accumulation Department of Key Laboratory of Carbonate Reservoirs, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
3. Shenzhen Branch Company, CNOOC, Guangzhou, Guangdong 510240, China;
4. Exploration Department of Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610041, China;
5. CNPC Logging Qinghai Business Division, Dunhuang, Gansu 736202, China

Received:2015-05-20 Revised:2016-06-15 Online:2016-10-08 Published:2016-11-07

摘要/Abstract

摘要： 高频层序是由海平面高频振动变化而形成的地层记录，一般形成于具有稳定沉降背景的盆地中，可与米兰科维奇天文周期旋回相对应。作为非海岸沉积环境的陆表海台，其高频层序发育具有一定的特殊性和代表性。在大量岩心观察、薄片分析、测井相研究的基础上，按能量环境、海平面升降及海水咸化旋回以及相序组合等特征，并考虑高频层序格架下储集层成因类型，将川中磨溪气田嘉二段陆表海碳酸盐台地高频层序划分为3类：台坪型、台内浅滩型与潟湖型。以膏质岩类、颗粒岩类广泛发育为特征，常见各种暴露标志，总体表现为向上变浅序列的多种岩性组合。高频层序地层格架内各级层序界面特征清晰，岩性组合稳定，可对比性强。同时，探讨了高频层序格架下早期储层成因机制，指出稳定沉积陆表海台地背景下的高频层序控制了岩相发育序列及同生岩溶作用，进而控制了不同成因类型储集层发育。

关键词: 高频层序, 碳酸盐岩, 嘉陵江组, 陆表海台地, 磨溪气田

Abstract: High-frequency sequences,generally formed in basins with stable subsidence settings and correspond well to astronomical Milankovitch cycles,are vivid records of high-frequency eustatic flucturation.Such sequences developed in epicontinental platforms of non-coastal sedimentary environment are both representative and special in certain ways.By combining core observations,thin section analyses and logging facies studies with such factors as energy environment,eustatic fluctuation and sea water salinity cycle as well as reservoir genesis types under high-frequency sequential framework,we classified high-frequency sequences in the epicontinental carbonate platform of the Jia 2 member of the Moxi gas field into the following three types:platform flat type,intraplatform shoal type and lagoon type.The sequences are found to be characterized by widely-distributed gypsiferous rocks and grainstone with all kinds of exposure marks.As a whole,they consist of stratigraphic assemblages of shallowing upwards sequences.Within the framework,sequences are separated by clear boundaries and stratigraphic assemblages are stable and highly comparable.The paper also discussed the mechanisms behind the formation of early reservoirs in the high-frequency sequence framework and proposed that the high-frequency sequences controlled the order of lithofacies development and the syngenetic karstification,and thus controlled the development of different genetic types of reservoirs.

Key words: high-frequency sequence, carbonate rock, Jialinjiang Formation, epicontinental sea platform, Moxi gas field

中图分类号:

TE121.3

刘宏,王高峰,刘南,等. 磨溪气田嘉陵江组二段陆表海台地高频层序发育特征及对储层的控制[J]. 石油与天然气地质, 2016, 37(5): 713-720. doi: 10.11743/ogg20160511 Liu Hong,Wang Gaofeng,Liu Nan,et al. Characterization of high-frequency sequences in the epicontinental carbonate platform of Jia 2 member in Moxi gas field and its controls over reservoirs[J]. Oil & Gas Geology, 2016, 37(5): 713-720. doi: 10.11743/ogg20160511

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磨溪气田嘉陵江组二段陆表海台地高频层序发育特征及对储层的控制

Characterization of high-frequency sequences in the epicontinental carbonate platform of Jia 2 member in Moxi gas field and its controls over reservoirs

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