沾化凹陷孤北洼陷下第三系沙三段扇三角洲沉积体系及其与油气聚集的关系  

SEDIMENTARY CHARACTERISTICS OF FAN-DELTAIC DEPOSITIONAL SYSTEM IN THIRD MEMBER OF SHAHEJIE FORMATION IN GUBEI OIL FIELD

作　　者：史文东[1] 赵卫卫[2] 

机构地区：[1]胜利油田有限公司东辛采油厂,山东东营257094 [2]石油大学地球资源与信息学院,山东东营257061

出　　处：《石油大学学报（自然科学版）》2003年第2期15-18,22,共5页Journal of the University of Petroleum,China(Edition of Natural Science)

基　　金：国家自然科学基金资助项目 (4 0 10 2 0 0 8)

摘　　要：对沾化凹陷孤北洼陷下第三系沙三段扇三角洲沉积体系及其与油气聚集关系的研究结果表明 ,孤北洼陷下第三系沙三段扇三角洲沉积体系十分发育 ,可进一步细分为扇三角洲平原、扇三角洲前缘和前扇三角洲 3个沉积亚相及 5个微相。受沉积物供给速率、可容空间增长速率及湖盆边界断层产状等因素控制 ,扇三角洲又可划分出退积型、进积型、陡坡型和缓坡型 4种类型。位于扇三角洲前缘的水下分流河道砂体物性好 ,可以构成优质储层。较深湖暗色泥岩为主要的烃源岩和盖层 ,扇三角洲前缘的砂砾岩体是较好的储集层。本区生、储、盖发育齐全 ,有着良好的勘探开发前景。Fan deltaic depositional systems were well developed in the third member of Shahejie formation in the Gubei oil field. Three subfacies and five microfacies can be distinguished in the fan deltaic depositional systems. The fan deltaic depositional system was controlled by sediment flux rate, available accommodation expansion rate and basin bounded fault. The style of the fan deltaic depositional system can be divided into four types of degrading, progressing, steep slope and slow slope fan deltas. The sub aqueous distributed channel sand bodies developed in the fan delta front zones are high quality reservoirs. The dark mudstone of deeper lake subfacies contains hydrocarbon source rocks and good cover rock. The sandy conglomerate bodies of fan delta front are the good reservoirs. Those bodies constitute a set of source reservoir cap rock assemblages. It was proved that the fan deltaic deposits in third member of Shahejie formation have the good potentials for oil and gas exploration.

关 键 词：沾化凹陷 孤北洼陷 下第三系 扇三角洲 沉积微相 砂砾岩体 储集层 油气地质 

分 类 号：P618.130.2[天文地球—矿床学] TE12[天文地球—地质学]