南海北部深水区白垩的发现及其储层意义

doi:10.7623/syxb2013S2004

石油学报 ›› 2013, Vol. 34 ›› Issue (增刊二): 32-38.DOI: 10.7623/syxb2013S2004

南海北部深水区白垩的发现及其储层意义

吴梦霜^1,2, 邵磊¹, 庞雄², 张浩¹, 陈淑慧²

1. 同济大学海洋地质国家重点实验室上海 200092;
2. 中海石油(中国)有限公司深圳分公司研究院广东广州 510240

收稿日期:2013-08-29 修回日期:2013-11-27 出版日期:2013-12-25 发布日期:2014-01-15
通讯作者: 吴梦霜，女，1973年7月生，1993年获南京大学地球科学系学士学位，现为同济大学博士研究生，主要从事沉积学研究。Email：wumsh@cnooc.com.cn
作者简介:吴梦霜，女，1973年7月生，1993年获南京大学地球科学系学士学位，现为同济大学博士研究生，主要从事沉积学研究。Email：wumsh@cnooc.com.cn
基金资助:
国家自然科学基金项目（No.91128207）；国家重大科技专项（2011ZX05025-006）和国家重点基础研究发展计划（973）项目（2009CB219400）资助。

Discovery of chalk in deep-water area of the northern South China Sea and its significance of reservoirs

WU Mengshuang^1,2, SHAO Lei¹, PANG Xiong², ZHANG Hao¹, CHEN Shuhui²

1. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China;
2. Research Institute of Shenzhen Branch, CNOOC China Limited, Guangzhou 510240, China

Received:2013-08-29 Revised:2013-11-27 Online:2013-12-25 Published:2014-01-15

摘要/Abstract

摘要：

南海北部深水区中新统钻遇了具有白垩状结构的高孔低渗抱球虫生物碎屑灰岩，孔隙度高达30% ，但渗透率小于1 mD。这些沉积岩主要由深水抱球虫组成，含陆源碎屑和黏土矿物，抱球虫体腔孔是高孔隙的主要贡献者，由于各体腔孔独立，抱球虫壳体之间的黏土矿物及其他生物碎屑杂基导致沉积岩整体孔隙连通性差。在北大西洋北海油田发现类似的深水沉积灰岩，是高孔优质储层。对比研究认为，这种深水抱球虫生物碎屑如果经浊流或等深流等改造，可以成为优质储层。关注这一类型的沉积作用，可望为南海深水勘探增加碎屑岩重力流储层以外的新储层类型。

关键词: 南海北部, 深水区, 白垩, 碳酸盐岩储层, 勘探新领域, 中新统

Abstract:

The chalky-textured globigerina bioclastic limestones with high porosity and low permeability were discovered during the drilling of Miocene strata in deep-water area of the northern South China Sea. The porosity is up to 30%, while the permeability is less than 1 mD. The limestones are mainly composed of deep-water globigerina, including terrigenous clastics and clay minerals. The globigerina coelomopores have made a major contribution to high porosity. However, these coelomopores are unconnected, and among them filled with clay minerals and bioclastics, leading to poor pore connectivity in the entire limestone. The similar deep-water limestone is also discovered in North Sea oil field of North Atlantic, and has high-quality reservoirs with high porosity. A comparative study suggests that the deep-water globigerina bioclastics can be transformed into high-quality reservoir through turbidity current or contour current. If this sedimentary process being concerned, a new type of reservoir is expected to be detected in deep-water of the South China Sea, besides clastic gravity flow reservoir.

Key words: northern South China Sea, deep-water area, chalk, carbonate reservoir, new exploration field, Miocene

中图分类号:

TE122.2

吴梦霜, 邵磊, 庞雄, 张浩, 陈淑慧. 南海北部深水区白垩的发现及其储层意义[J]. 石油学报, 2013, 34(增刊二): 32-38.

WU Mengshuang, SHAO Lei, PANG Xiong, ZHANG Hao, CHEN Shuhui. Discovery of chalk in deep-water area of the northern South China Sea and its significance of reservoirs[J]. ACTA PETROLEI SINICA, 2013, 34(增刊二): 32-38.

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南海北部深水区白垩的发现及其储层意义

Discovery of chalk in deep-water area of the northern South China Sea and its significance of reservoirs

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