南羌塘坳陷布曲组油藏带特征及空间演化规律

doi:10.3969/j.issn.1673-8926.2017.01.011

岩性油气藏 ›› 2017, Vol. 29 ›› Issue (1): 90–96.doi: 10.3969/j.issn.1673-8926.2017.01.011

南羌塘坳陷布曲组油藏带特征及空间演化规律

夏国清^1,2, 伊海生^1,2, 李高杰¹, 金峰¹, 季长军³, 李启来¹

1. 成都理工大学沉积地质研究院, 成都 610059;
2. 油气藏地质及开发工程国家重点实验室(成都理工大学), 成都 610059;
3. 中国地质科学院, 北京 100037

收稿日期:2016-07-11 修回日期:2016-09-07 出版日期:2017-01-21 发布日期:2017-01-21
作者简介:夏国清(1982-),男,博士,讲师,主要从事沉积学、沉积盆地分析及石油地质学的教学和科研工作。地址:(610059)四川省成都市成华区二仙桥东三路1号成都理工大学沉积地质研究院。Email:xiaguoqing2012@cdut.cn。
基金资助:
国土资源部沉积盆地与油气资源重点实验室开放基金“羌塘盆地南部隆鄂尼—昂达尔错地区油源对比及油气富集规律研究”（编号:zdsys2014002）和油气藏地质及开发工程国家重点实验室（成都理工大学）开放基金“南羌塘盆地有效烃源岩综合评价”（编号:PLC201603）联合资助

Characteristics and evolution of oil reservoir zones of Buqu Formation in the southern Qiangtang Depression

XIA Guoqing^1,2, YI Haisheng^1,2, LI Gaojie¹, JIN Feng¹, JI Changjun³, LI Qilai¹

1. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China;
2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China;
3. Chinese Academy of Geological Sciences, Beijing 100037, China

Received:2016-07-11 Revised:2016-09-07 Online:2017-01-21 Published:2017-01-21

摘要/Abstract

摘要： 南羌塘坳陷大面积出露中侏罗统布曲组油藏带，为了了解布曲组油层地下隐伏特征，查明油气富集规律，根据油藏带地质产状、发育层位、沉积序列及空间分布等特征，结合油藏带形成时的古地理格架，研究了油藏带的形成与演化过程。结果表明，油藏带平面上集中分布于隆鄂尼、昂达尔错和赛仁等3 个区块，并以东西向稳定线状展布为特征，成层性好；油层内部可见大量礁滩相残余构造，常与介壳灰岩、生物碎屑灰岩、鲕粒灰岩及砂屑灰岩相伴生，显示出典型台地边缘礁滩相沉积特征，其形成与演化受沉积相带和海平面升降变化的控制：在布曲组沉积早期，台缘浅滩位于南羌塘坳陷南缘塞仁—昂罢存咚一带；随着海平面的上升，沉积相带发生退积，向北依次形成晓嘎晓那—日尕尔保、扎仁—冬浪啪和日阿梗—噢纵等一系列线状分布的台地边缘相沉积；在布曲组沉积晚期，由于海平面下降，台地边缘礁滩相沉积向南进积扩展，形成隆鄂尼区块上部礁滩相沉积。

Abstract: Oil reservoir zones of Middle Jurassic Buqu Formation are widely exposed in southern Qiangtang Depression. Based on the geological occurrence,stratigraphic sequence,sedimentary facies and space distribution of oil reservoir zones,combined with paleogeography framework,the subsurface characteristics and evolution of the oil reservoir zones were studied. The results show that the oil reservoir zones developed in three blocks：Long' eni,Angdaercuo and Sairen,respectively,and they are characterized by east-west stable linear distribution and good stratification. A large number of reef bank facies residual structures can be seen in the reservoir,and they are associated with coquinite,bioclastic limestone,oolitic limestone and calcarenite. These oil reservoir zones are controlled by platform margin facies and the sea-level changes. At the early Buqu stage,the reef and shoal facies deposited along platform margin from Sairento Angbacundong. At the middle Buqu stage,with the rise of sea level,a series of parallel and linear platform margin facies formed by retrograding northward in Xiaogaxiaona-Rigaerbao, Zharen-Donglangpa and Riagen-Aozong. At the late Buqu stage,the progressive reef and bank facies advanced southward gradually along the platform margin with the drop of sea-level,and widely developed in Long' eni block.

中图分类号:

TE121

夏国清, 伊海生, 李高杰, 金峰, 季长军, 李启来. 南羌塘坳陷布曲组油藏带特征及空间演化规律[J]. 岩性油气藏, 2017, 29(1): 90–96.

XIA Guoqing, YI Haisheng, LI Gaojie, JIN Feng, JI Changjun, LI Qilai. Characteristics and evolution of oil reservoir zones of Buqu Formation in the southern Qiangtang Depression[J]. Lithologic Reservoirs, 2017, 29(1): 90–96.

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南羌塘坳陷布曲组油藏带特征及空间演化规律

Characteristics and evolution of oil reservoir zones of Buqu Formation in the southern Qiangtang Depression

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