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中南大学学报(自然科学版)

Journal of Central South University

第45卷    第9期    总第241期    2014年9月

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文章编号:1672-7207(2014)09-3234-10
渤南洼陷沙四上亚段多类型沉积体系形成机制
刘鹏1,宋国奇1, 2,刘雅利3,孟涛3

(1. 中国石油大学(华东) 地球科学与技术学院,山东 青岛,266555;
2. 中国石化胜利油田分公司,山东 东营,257000;
3. 中国石化胜利油田分公司 地质科学研究院,山东 东营,257000
)

摘 要: 为揭示渤南洼陷沙四上亚段沉积体系的分布规律及其控制因素,明确勘探方向,通过地震剖面、钻探、测井、分析化验等所获资料的综合分析,在渤南洼陷沙四上亚段识别出扇三角洲体系、近岸水下扇体系、滩坝体系和湖泊体系共4种沉积体系,并通过古气候、古盐度、古物源、古水深和古地貌等因素对沉积体系形成与分布的控制作用,总结出“五古”控制模式。依据层序划分研究结果,对各体系域的沉积体系展布特征进行探讨,对各沉积体系物性特征进行分析。研究结果表明:低位域广泛发育扇三角洲和砂岩滩坝,湖侵域和高位域呈现出陡坡近岸水下扇、缓坡扇三角洲、古隆起碳酸盐岩、古洼陷盐湖沉积这一沉积面貌;结合断裂体系分布预测出4个有利储集层分布区,即北部扇三角洲前缘、西部生物礁、中部砂岩滩坝及南部扇三角洲—碳酸盐岩滩坝混合区。

 

关键字: 渤南洼陷;沙四上亚段;沉积体系;控制因素;有利储集层

Mechanism of depositional system in upper fourth member of Shahejie Formation in Bonan sag
LIU Peng1, SONG Guoqi1, 2, LIU Yali3, MENG Tao3

1. College of Geo-Science and Technique, China University of Petroleum (East China), Qingdao 266555, China;
2. SINOPEC Shengli Oilfield Company, Dongying 257000, China;
3. Geological Science Research Institute, SINOPEC Shengli Oilfield Company, Dongying 257000, China

Abstract:The upper member 4 of Shahejie Formation in the Bonan sag is one of the most important oil-bearing and exploration formations. Based on comprehensive analysis of seismic data, drilling data, logging data and analysis testing data, four sedimentary systems were identified in this area, including fan delta system, nearshore subaqueous fans system, beach bar system and lake system, and the control factor of sedimentary systems such as the palaeoclimate, palaeogeomorphology, palaeoprovenance, palaeowater depth, palaeosalinity were studied, and the five-palaeo control model for the upper part of fourth member 4 of Shabejie Formation in Bonan sag was put forward. According to the results of sequence stratigraphy, the distribution patterns of the depositional systems in space of each system tract were analyzed. At last, four favorable areas were predicted in accordance with analysis testing data. The results show that the fan delta system and sandstone beach bar system distribute in lowstand system tract and nearshore subaqueous fans system, fan delta system and limestone beach bar system distributed in transgressive and highstand system tract. Four favorable areas are the northern fan delta front area, the western reef area, the central sandstone beach bar area and the southern mixing area of fan delta—limestone beach bar.

 

Key words: Bonan sag; upper part of fourth member of Shahejie Formation; sedimentary system; control factor; favorable reservoir

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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