| 松辽盆地梨树凹陷泉头组沉积特征 |
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| 引用本文： | 唐黎明,何兴华. 松辽盆地梨树凹陷泉头组沉积特征[J]. 石油与天然气地质, 2002, 23(3): 266-268,273. DOI: 10.11743/ogg20020314 |
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| 作者姓名： | 唐黎明 何兴华 |
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| 作者单位： | 中国石化新星东北分公司, 吉林长春, 130062 |
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| 摘 要： | 松辽盆地梨树凹陷泉头组主要发育有冲积扇、辫状河、曲流河、浅水湖和滨浅湖等沉积相,盆地的轻微振荡性升降使其沉积演化可分为 4个时期,早期 (泉一段)是断陷沉积向坳陷沉积转换的过渡时期;中期 (泉二段)由于盆地沉降速率大,河流冲积作用弱,发育了大规模的浅水湖,沉积环境由浅水湖、洪泛洼地和少量曲流河组成;晚期 (泉三段-泉四段中期)区域沉积变缓、河流作用再度增强,形成十分发育的储层段;末期 (泉四段晚期)受全盆地发展影响,松辽大湖盆形成雏形并开始扩展。泉头组的沉积演化经历了河流冲积平原沉积的完整沉积序列,代表了松辽盆地断坳转换时期的沉积特征。
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| 关 键 词： | 泉头组 沉积相 演化 梨树凹陷 |
| 文章编号： | 0253-9985(2002)03-0266-03 |
| 收稿时间： | 2002-07-17 |
SEDIMENTARY CHARACTERISTICS OF QUANTOU FORMATION IN LISHU SAG OF SONGLIAO BASIN |
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| Tang Liming He Xinghua. SEDIMENTARY CHARACTERISTICS OF QUANTOU FORMATION IN LISHU SAG OF SONGLIAO BASIN[J]. Oil & Gas Geology, 2002, 23(3): 266-268,273. DOI: 10.11743/ogg20020314 |
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| Authors: | Tang Liming He Xinghua |
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| Affiliation: | Northeast Filiale of Newstar Company, SINOPEC, Changchun, Jilin |
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| Abstract: | The mainly developments of sedimentary facies in Quantou Formation of Lishu Sag in Songliao basin are as follows: alluvial fan, braided river, mendering river, shallow water lake and shore shallow water lake etc. Slightly vibration-uplift and subsidence of the basin make it possible to divide it sedimentary evolution into 4 stages; early stage( Quan No.1 interval) is the stage of fault subsidence transited to sag deposition; middle stage(Quan No.2 interval) is the stage of large scale shallow water lakes developed due to great subsidence rate of the basin and weak {effects} of river alluviation, and sedimentary environment is composed of shallow water lakes, flooding lacunae and a few meandering rivers; later stage(Quan No.3 interval and middle stage of Quan No.4 interval) reservoir intervals were quite developed due to the slow down of regional sedimentation and reinforcement of river {effect;} during final stage({later} stage of Quan No.4 interval)Songliao big lake-basin came into an embryonic form and began to expand due to the effect of the development of the whole basin. Sedimentary evolution of Quantou Formation has experienced a complete sedimentary sequence of river alluvium plain sedimentation representing the sedimentary characteristics of transformational period of Songliao basin fault sag. |
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| Keywords: | Quantou Formation sedimentary facies evolution Lishu sag |
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