
第27卷第2期 2013年4月
现代地质 GEOSCIENCE
Vol. 27Na. 2 Ape.2013
南海北部自云凹陷深水区SQ13.8深水扇砂体识别
与分布研究:以SF-5为例
徐少华',徐国强2,杨俊华3,李小刚*,胡琏”,蔡长娥°,郭伟5(1.成都理工大学能源学院,四川成都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),四川成都610059: 3.中国石油技术开发公司,北京100028;4.重庆科技学院石油与天然气工程学院,重庆401331;5.中海石油(中国)
有限公司深圳分公司,广东广州510240:6.中国石油大学油气资源与探测国家重点实验室,北京102249)
摘要:珠江口盆地白云凹陷在维"白云运动"之后,在13.8Ma发生了一次大规模的海退事件,海平面下降至陆架坡折带附近,三角洲向盆地方向推进最远,十分有利于深水扇的发育。通过深水陆坡区B6井及陆架边缘多口井的井震标定,结合钻井、测井分析,系统总结出具有厚度较大(20~40m)、以泥质粉砂岩为主的斜坡扇储层,对应低频、短轴、强振幅的地震反射特征,在负极性显示的地震剖面上,表现为强波谷地震响应。层序地层格架分析认为工区处于 SQ13.8"陆架边缘三角洲一沉积过路区一斜坡扇"的沉积环境,并在层序格架的约束下,通过合成地震记录建立井-震关系,对斜坡扇区第5套砂层组(SF-5)进行储层识别与追踪解释,确定SF-5砂层为主体分布在陆架坡折带外侧陆坡区的丘状体,平面形态似带状或朵叶状,具有斜坡扇的特征,其优质储层主要分布在工区的中部-西部地区,呈NW-SE方向条带状展布。
关键词:南海北部;白云深水区;斜坡扇;合成地震记录:层序地层格架;储层分布
中图分类号:TE51
文献标志码:A
文章编号:10008527(2013)02036607
ReservoirIdentificationandPlaneDistributionResearchontheDeepWater
Fan of SQ13.8 in the Deep-Water Region, the Baiyun Sag in
NorthernSouthChinaSea:ACaseStudyof SF-5
XU Shao-hua', XU Guo-qiang"-2, YANG Jun-hua", LI Xiao-gang', HU Lian', CAI Chang-e°, GUO Wei'
(1. College of Energy Resources, Chengda Unirersity of Technology, Chengdu, Sichaan610059, China;
2. Stale Key Laborafory of Oil and Gas Resenoir Geology and Exploitation, Chengdu Unirersity of Technology, Chengdur, Sichuan610059, China;
3. China Petroleum Technology and Drelopmenr Corporartion, Bejing 100028, Chine;
4. School of Petroleum Engineering, Chongging U/nirersily of Science & Technology, Chongqing401331, China :
5. Shenzhen Branch of CNO0C Lud., Guangzhou, Guangdong 510240, China;
6, State Key Laboratory of Petroleum Resourece and Prospecting, China Unitersity of Petroleum, Bejing 102249, China)
Abstract: After the Baiyun Movement (13. 8 Ma), Baiyun Sag in the Pearl River Mouth Basin happened a massive regressive event, the sea level regressed near the shelf slope-break zone and the delta propelled furthest towards the basin, which was very beneficial to the development of deep-water fan. By means of the drilling and logging analysis and the well-seismic calibration of B6 well in the deep water area of the continental slope and some wells in the shelf margin, it was concluded that reservoir of slope fan with larger thickness (20 m to 40 m) in argillaceous siltstone, corresponded to the low frequency, short axis and high amplitude in the seismic reflec-tion, and strong wave hollow in the negative polarity display of the seismic profiles. Through the establishment
收稿日期:2012-08-20;改回日期:2012-10-20;责任编辑:孙义梅。基金项目:国家"十二·五"科技重大专项项目(2011ZX05025-003-006)。
作者简介:徐少华,男,硕士研究生。1987年出生,石油地质学专业,主要从事地震资料解释。层序地层学等方面的研究工
作。Email;xsh_xu@163.com