大型坳陷湖盆浅水三角洲沉积模式———以松辽盆地北部葡萄花油层为例

doi:10.3969/j.issn.1673-8926.2007.02.005

岩性油气藏 ›› 2007, Vol. 19 ›› Issue (2): 28–34.doi: 10.3969/j.issn.1673-8926.2007.02.005

大型坳陷湖盆浅水三角洲沉积模式———以松辽盆地北部葡萄花油层为例

王建功^{1, 2}, 王天琦², 卫平生², 梁苏娟², 韩小强²

1. 中国科学院兰州地质研究所, 甘肃兰州 730000; 2. 中国石油勘探开发研究院西北分院, 甘肃兰州 730020

出版日期:2007-06-15 发布日期:2007-06-15
作者简介:王建功, 1969年生, 男, 博士, 高级工程师, 主要从事沉积学和油气勘探的科研工作。E- mail: wangjg6150@163.com
基金资助:
中国石油天然气股份有限公司勘探与生产分公司前期预探项目( ktqq- 2004- 002)

Sedimentary mode of shallow lacustr ine delta of large continental basin———An example from Putaohua Formation in nor thern Songliao Basin

WANG Jiangong ^1,2，WANG Tianqi²，WEI Pingsheng²，LIANG Sujuan²，HAN Xiaoqiang²

1. Lanzhou Institute of Geology，Chinese Academy of Sciences，Lanzhou 730000，China;
2. Research Institute of Petroleum Exploration & Development-Northwest（NWGI），PetroChina，Lanzhou 730020，China

Online:2007-06-15 Published:2007-06-15

摘要/Abstract

摘要：

基于岩心观察、地震、测井、录井以及分析化验资料, 开展松辽盆地北部葡萄花油层高分辨率层序地层学研究, 在此基础上论述葡萄花油层的区域沉积相展布及微相类型和特征。提出葡萄花油层属于浅水湖泊三角洲沉积, 沉积主体以三角洲前缘相带为主, 与经典三角洲前缘相带模式不同, 主要表现在: ①前缘相带延伸较宽, 直接覆盖整个湖盆, 并表现为频繁暴露水面的特征, 深湖、半深湖相对不发育; ②分流河道遭受不同程度的席状砂化, 依次划分为弱席状化、中等席状化、强席状化等3 种类型; ③浅水湖泊三角洲沉积模式不具备Gilbert 典型三角洲顶积层、前积层和底积层的三元沉积模式。建立了浅水湖泊三角洲前缘相带在LST、TST、HST 不同体系域的平面分布模式, 分别
为朵状、辫状以及枝状模式。

关键词: 低电阻率, 油气层, 形成机理, 评价方法

Abstract:

Based on the study of the high resolution sequence stratigraphy of Putaohua Formation referred to the data of core, seismic, well logging and laboratory test, the regional distribution of sedimentary facies and the characteristics of microfacies were discussed. It was presented that Putaohua Formation is shallow lacustrine delta deposit which is mainly composed of delta fore- facies zone and differs from typical delta deposit mode in three aspects, including that: fore delta zone spread over the whole lake basin, being exposed frequently above water level, with deep and semi -deep lacustrine facies relatively undeveloped; distributary channels were sheeted by lake water, and were divided into three types, including poorly sheeted, moderately sheeted and intensely sheeted; being without topset bed, foreset bed and bottomset bed, sedimentary mode of shallow lacustrine delta differs from typical Gilbert delta deposit. The distribution mode of shallow lacustrine delta fore- facies zone was established based on the sedimentary characteristics of different system tracts ( LST, TST, HST) , represented in lobate delta, braided stream delta and branched delta modes respectively.

Key words: low-resistivity, hydrocarbon reservoir, formation mechanism, evaluation method

王建功, 王天琦, 卫平生, 梁苏娟, 韩小强. 大型坳陷湖盆浅水三角洲沉积模式———以松辽盆地北部葡萄花油层为例[J]. 岩性油气藏, 2007, 19(2): 28–34.

WANG Jiangong，WANG Tianqi，WEI Pingsheng，LIANG Sujuan，HAN Xiaoqiang. Sedimentary mode of shallow lacustr ine delta of large continental basin———An example from Putaohua Formation in nor thern Songliao Basin[J]. Lithologic Reservoirs, 2007, 19(2): 28–34.

参考文献

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大型坳陷湖盆浅水三角洲沉积模式———以松辽盆地北部葡萄花油层为例

Sedimentary mode of shallow lacustr ine delta of large continental basin———An example from Putaohua Formation in nor thern Songliao Basin

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