南海北部琼东南盆地陵水段峡谷沉积建造及勘探意义

张道军; 王亚辉; 赵鹏肖; 苏榆丰; 左倩媚

doi:10.3969/j.issn.0253-4193.2015.02.003

南海北部琼东南盆地陵水段峡谷沉积建造及勘探意义

doi: 10.3969/j.issn.0253-4193.2015.02.003

1.
中海石油(中国)有限公司湛江分公司, 广东湛江 524057
2.
中海油能源发展股份有限公司钻采工程研究院湛江实验中心, 广东湛江 524057

基金项目: 国家科技重大专项(2011ZX05025).

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出版历程
- 收稿日期: 2014-07-15
- 修回日期: 2014-10-20

Sedimentary formation and exploration significance of the Lingshui Canyon system in the Qiongdongnan Basin, northern South China Sea

1.
Zhanjiang Branch of CNOOC Ltd., Zhanjiang 524057, China
2.
CNOOC Energy Technology & Services-oil field Engineering Research Institute Zhanjiang Central Laboratory, Zhanjiang 524057, China

摘要

摘要: 琼东南盆地中央峡谷为一大型轴向峡谷体系,具有明显的"分段性"特征,不同区段沉积充填和内部结构均存在明显的差异,其中陵水段位于峡谷西段,具有非常好的储层物性特征,是深水区峡谷勘探的重点区域.为了进一步精细刻画陵水段峡谷内部水道复合体的沉积充填及沉积微相展布特征,本文借助新增加的三维地震资料和新钻井资料,通过峡谷三级层序界面的识别,将峡谷充填划分为3个三级层序SQ1、SQ2和SQ3,并通过古生物有孔虫化石带、钙质超微化石带及井-震结合确定了峡谷底界为中中新世晚期S40界面,陵水段峡谷自西向东依次识别出6种主要的内部充填结构,且将SQ3层序细分为5个次级层序(SSQ1~SSQ5);结合属性特征,精细刻画了陵水段峡谷内沉积微相平面展布及空间演化特征,并指出点砂坝在SSQ1层序最发育,且规模较大,横向上连片分布,将是下步勘探的有利储集体.
- 南海 /
- 琼东南盆地 /
- 陵水峡谷体系 /
- 沉积建造 /
- 勘探意义
Abstract: The central canyon system(CCS) in Qiongdongnan Basin(QDNB), a large axial submarine canyon, can be characteriszed by "segmentation". Its different segmentation has different changes of sedimentary evolution and internal architectures of the CCS. The Lingshui segmentation of the CCS, located in the western of the canyon, is the key of the exploration of deep canyon area, with very good reservoir physical property. In order to further understand the sedimentary evolution and internal architectures of the channel-levee complexes of the Lingshui CCS (LSCCS)based on new 3D seismic data and drilling-hole, the present study described and discussed internal architectures, paleontology chronostratigraphy and sequence stratigraphy of the drilling hole. We could divide five sub-sequence cycle for the Huangliu formation of the LSCCS, analyze the shaped and attributed characteristics in the seismic profile, and study the microfacies and their plane distribution in each sub-sequence cycle. By the study of sedimentary microfacies spatial evolution characteristics, it will be helpful for guiding the further oil and gas exploration.
- northern South China Sea /
- Qiongdongnan Basin /
- Lingshui canyon system /
- sedimentary formation /
- exploration significance

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