南图尔盖盆地SA区块河道砂体演化及定量刻画

doi:10.11885/j.issn.1674-5086.2016.08.09.01

西南石油大学学报(自然科学版) ›› 2018, Vol. 40 ›› Issue (1): 59-67.DOI: 10.11885/j.issn.1674-5086.2016.08.09.01

南图尔盖盆地SA区块河道砂体演化及定量刻画

郭凯¹, 赵瑞春², 范乐元¹, 胡圣利¹, 李洋¹

1. 中国石油长城钻探工程有限公司解释研究中心, 北京朝阳 100101;
2. 中国石油冀东油田公司陆上作业区, 河北唐山 063200

收稿日期:2016-08-09 出版日期:2018-02-01 发布日期:2018-02-01
通讯作者: 郭凯,E-mail:gk1228@126.com
作者简介:郭凯,1986年生,男,汉族,山东威海人,工程师,博士,主要从事地震沉积学及油气综合地质研究。E-mail:gk1228@126.com;赵瑞春,1979年生,男,汉族,山西平陆人,工程师,主要从事油藏开发及采油工艺研究。E-mail:zhaoruichun@cnpc.com.ve;范乐元,1978年生,男,汉族,天津武清人,高级工程师,硕士,主要从事油气综合地质研究与测录试资料综合评价工作。E-mail:fanleyuan@cnlc.cn;胡圣利,1970年生,男,汉族,湖北天门人,工程师,主要从事地震资料解释及分析工作。E-mail:1hsl@sina.com;李洋,1988年生,女,汉族,山东东营人,工程师,硕士,主要从事油气综合地质研究。E-mail:liyang@cnlc.cn
基金资助:
国家科技重大专项（2011ZX05028）

Evolution and Quantitative Delineation of Fluvial Channel Sandbodies in Block SA of the South Turgay Basin, Kazakhstan

GUO Kai¹, ZHAO Ruichun², FAN Leyuan¹, HU Shengli¹, LI Yang¹

1. Geoscience Centre, CNPC Greatwall Drilling Company, Chaoyang, Beijing 100101, China;
2. Onshore Operation Area, Jidong Oilfield Company, CNPC, Tangshan, Hebei 063200, China

Received:2016-08-09 Online:2018-02-01 Published:2018-02-01

摘要/Abstract

摘要： 针对河道砂体横向变化快而难以有效刻画评价的问题，综合应用分频检测、相位调整、地层切片及地质体雕刻等技术对南图尔盖盆地SA区块上侏罗统阿克萨布拉克组河道发育特征及期次进行了研究。首先，利用分频方法检测出目的层段可能存在的两期调谐厚度不同的河道沉积体；然后，采用波阻抗分析和90°相位转换，揭示目的层段地震负振幅与河道砂岩具有较好的对应关系；最后，在高频层序地层格架内制作等时地层切片的基础上，通过河道沉积特征及典型地层切片振幅的单井标定分析，识别并分期刻画出两期不同类型的河道砂体。结合河道弯度、宽厚比及储集体积等参数综合分析认为，早期河道具有低弯度曲流河特征，晚期河道为具有平直河特征的三角洲平原分流河道，且早期河道储集体积明显高于晚期河道。

关键词: 分频检测, 相位调整, 地层切片, 河道识别, 地震沉积学, 南图尔盖盆地

Abstract: Effective delineation and evaluation of fluvial channel sandbodies are impeded by their rapid lateral variations. In this study, frequency detection, phasing, stratal slicing, geological engraving, and other techniques were comprehensively applied to study the characteristics and duration of channel development in the Upper Jurassic Akshabulak Formation, located in Block SA of the South Turgay Basin. First, the possible existence of two stages of channel sedimentary bodies with different tuning thickness was detected within the target segment using the frequency-division method. Next, wave impedance analysis and 90° phase conversion revealed relatively good agreement between the seismic negative amplitude of the target segment and channel sands. Lastly, based on a high-frequency sequence stratigraphic framework, two types of channel sands from different stages were identified and delineated using isochronous stratal slicing; single-well calibration analysis of the characteristics of channel sedimentation were combined with the amplitudes of typical stratal slices. A comprehensive analysis of various parameters, including channel sinuosity, width-thickness ratio, and reservoir volume, suggests that the early-stage channel had characteristics of a meandering river with low sinuosity. In contrast, the late-stage channel was a delta plain distributary channel, with the characteristics of a flat, straight river. In addition, the channel had a significantly higher reservoir volume in the early stage compared to the late stage.

Key words: frequency detection, phasing, stratal slicing, fluvial channel identification, seismic sedimentology, South Turgay Basin

中图分类号:

TE122

郭凯, 赵瑞春, 范乐元, 胡圣利, 李洋. 南图尔盖盆地SA区块河道砂体演化及定量刻画[J]. 西南石油大学学报(自然科学版), 2018, 40(1): 59-67.

GUO Kai, ZHAO Ruichun, FAN Leyuan, HU Shengli, LI Yang. Evolution and Quantitative Delineation of Fluvial Channel Sandbodies in Block SA of the South Turgay Basin, Kazakhstan[J]. 西南石油大学学报(自然科学版), 2018, 40(1): 59-67.

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南图尔盖盆地SA区块河道砂体演化及定量刻画

Evolution and Quantitative Delineation of Fluvial Channel Sandbodies in Block SA of the South Turgay Basin, Kazakhstan

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