沾化凹陷孤东油田六区馆上段古河流沉积演化规律研究
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1.辽宁石油化工大学 石油天然气工程学院;2.中国石油大学华东 地球科学与技术学院

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TE122.2

基金项目:

国家自然科学基金项目(41702158);辽宁省教育厅青年项目(LJKQZ20222320);辽宁省教育厅基本科研项目(JYTMS20231457);辽宁石油化工大学博士科研启动基金(2021XJJL-028)


Study on Sedimentary Evolution of Paleofluvial Sandbodies of Upper Guantao Formation in Guandong Oilfield, Zhanhua Sag
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Affiliation:

1.Colloge of Petroleum Gas Engineering,Liaoning Petrochemical University,Fushun,Liaoning;2.School of Geoscience,China University of Petroleum,Qingdao,Shandong

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    摘要:

    孤东油田馆上段发育河流相储层是重要的产油层位,进入开发后期的老油田需要开展砂体特征与规模精细表征。基于岩心、测井、地震等相标志分析,确定了其由辫状河到曲流河的沉积特征与演化模式。馆上段下部主要发育辫状河储层,发育心滩、辫状河道、溢岸砂微相,馆上段上部发育曲流河储层,发育点坝、废弃河道、决口扇、泛滥平原等微相类型。通过岩-电标定分析,确定了辫状河、曲流河的测井响应特征与砂体发育规律,辫状河河道砂体多期切割叠置,横向上连片分布多分叉,曲流河河道砂体孤立发育,横向上呈条带状发育。在密井网的控制下,确定了辫状河、曲流河砂体的规模,定量表征了河流相砂体纵向演化规律。

    Abstract:

    Fluvial reservoir of the upper Guantao Formation in Guandong Oilfield is an important oil-bearing strata, and the characteristics and scale of sand bodies in the late development of the old oilfield need a fine characterization. The sedimentary characteristics and evolution model from braided fluvial to meandering fluvial deposit were determined based on the analysis of facies markers such as core, logging, and seismic. The braided fluvial reservoir develops braid bar, braid channel, and overbank sand microfacies at the lower part of upper Guantao Formation. Meandering fluvial reservoir develops point bar, abandoned channel, crevasse splay, and floodplain are developed microfacies at the upper part of upper Guantao Formation. Through core-log calibration analysis, the logging response characteristics and sandbody development law of braided and meandering river are determined. The braided fluvial channel sand bodies are stacked in multiple stages, and are distributed in multiple branches in the plane. The meandering river channel sand bodies develop in isolation with a strip shape in the plane. Under the control of dense well array, the scale of braided and meandering river sand body was determined, and the sedimentary evolution process of fluvial facies sand body was quantitatively characterized.

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乔雨朋,邱隆伟,宋璠. 沾化凹陷孤东油田六区馆上段古河流沉积演化规律研究[J]. 科学技术与工程, , ():

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  • 收稿日期:2023-11-07
  • 最后修改日期:2024-06-11
  • 录用日期:2024-06-24
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