Division of Base-level Cycles and Superimposition of Sandbodies in Marine Braided Delta Reservoir:A Case Study of Zhujiang Formation in Xijiang W Oilfield, Pearl River Estuary Basin

doi:10.19657/j.geoscience.1000-8527.2018.05.05

Abstract

Abstract:

Reservoirs in the Zhujiang Formation of the Xijiang W Oilfield are composed of marine braided river delta front deposits. They are characterized by complex internal architecture and contain different microfacies. In this study, high-resolution sequence stratigraphic framework is established via comprehensive analysis of core, wireline logs, spectrum and high-resolution sequence stratigraphy theory. The results show the presence of five long-term and eighteen medium-term base-level cycles within the Zhujiang Formation.The sandbody architecture comprises four types (i.e., the isolated-,lateral superposition-, two-way migration-and amalgamated type) within the Zhujiang Formation stratigraphic framework, as revealed by statistical analysis of geometric parameters and sandbody distributions. The results indicate that long-term base-level changes play an important role in controlling the sandbody architecture and evolution. During the early-stage rising or late-stage falling in the base-level cycle,the sandbody architecture is dominated by the amalgamated type and lateral superposition type, yet it is dominated by the two-way migration type and isolated type in the opposite case. Analysis of sandbody architecture provides an effective tool for discovering residual oil and assists decision-making process in offshore hydrocarbon exploration.

Key words: base-level cycles, spectral analysis, delta front, Zhujiang Formation, configuration characterization

CLC Number:

TE121.3

LIANG Xu, FAN Ting’en, HU Guangyi, CHEN Fei, WANG Haifeng, FAN Hongjun. Division of Base-level Cycles and Superimposition of Sandbodies in Marine Braided Delta Reservoir:A Case Study of Zhujiang Formation in Xijiang W Oilfield, Pearl River Estuary Basin[J]. Geoscience, 2018, 32(05): 913-923.

Figures/Tables 11

Fig.1 Location of Xijiang W oilfield in the Pearl River estuary basin

Fig.2 Structure and boundary surface of middle-and long-term base level cyclic sequences of the Zhujiang Formation, Xijiang W oilfield

Fig.3 Division and correlation of of middle-and long-term base level cyclic sequences of the Zhujiang Formation

Fig.4 Typical features of subaqueous distributary channels in the study area

Table 1 Statistical table of different geometric parameters of genetic sandbody configuration

Fig.5 Division and correlation of H6B layer in Xijiang W oilfield

Fig.6 Cross section and correlation of H5A layer in Xijiang W oilfield

Fig.7 Division and correlation of H8 layer in Xijiang W oilfield

Fig.8 Cross section and correlation of H11 layer in Xijiang W oilfield

Fig.9 Evolution of sandbody configurations under the control of medium-term base-level cycles

Fig.10 Application of sandbody configurations in the H11 layer

References 25

[1]	于兴河. 油田开发中后期储层面临的问题与基于沉积成因的地质表征方法[J]. 地学前缘, 2012, 19(2): 1-14.
[2]	封从军, 赵逸, 贾鹏, 等. 浅水湖盆三角洲储层构型模式探讨[J]. 地质科学, 2013, 48(4): 1234-1245.
[3]	刘桂珍, 鲍志东, 关延华, 等. 英台油田辫状河三角洲前缘沉积特征及构型要素[J]. 石油天然气学报, 2008, 30(6): 186-189.
[4]	赵伦, 王进财, 陈礼, 等. 砂体叠置结构及构型特征对水驱规律的影响:以哈萨克斯坦南图尔盖盆地Kumkol 油田为例[J]. 石油勘探与开发, 2014, 41(1): 86-94.
[5]	贾开富, 戴俊生, 刘海磊, 等. 辫状河三角洲储层砂体建筑结构分析[J]. 沉积与特提斯地质, 2011, 31(4): 64-69.
[6]	卢虎胜, 林承焰, 程奇, 等. 东营凹陷永安镇油田沙二段三角洲相储层构型及剩余油分布[J]. 东北石油大学学报, 2013, 37(3): 40-47.
[7]	吴胜和, 翟瑞, 李宇鹏. 地下储层构型表征:现状与展望[J]. 地学前缘, 2012, 19(2): 15-23.
[8]	邓宏文, 王红亮, 祝永军. 高分辨率层序地层学——原理与应用[M]. 北京: 地质出版社, 2003: 1-253.
[9]	邓宏文. 高分辨率层序地层学应用中的问题探析[J]. 古地理学报, 2009, 11(5): 471-480.
[10]	CROSS T A, LESSENGER M A. Sediment volume partitioning:Rationale for stratigraphic model evaluation and high-resolutionstratigraphic correlation[M]// GRADSTEIN F M,SANDVIK K O,MILTON N J. Sequence Stratigraphy: Concepts and Applications. Norwegian:Elsevier, 1998: 171-195.
[11]	龙国清, 韩大匡, 田昌炳, 等. 油藏开发阶段河流相基准面旋回划分与储层细分对比方法探讨[J]. 现代地质, 2009, 23(5): 963-967.
[12]	龙国清, 邓宏文, 刘斌, 等. 宝浪油田三工河组基准面旋回与储层宏观非均质性[J]. 石油地质与工程, 2007, 21(2): 13-17.
[13]	张昌民, 尹太举, 李少华, 等. 基准面旋回对河道砂体几何形态的控制作用[J]. 岩性油气藏, 2007, 19(4): 9-12.
[14]	李祺, 陈振林. 泌阳凹陷下二门油田三角洲前缘短期基准面旋回构成样式及砂体成因[J]. 地质科技情报, 2009, 28(4): 15-20.
[15]	陈飞, 罗平, 张兴阳, 等. 鄂尔多斯盆地东缘上三叠统延长组砂体结构与层序地层学研究[J]. 地学前缘, 2010, 17(1): 330-338.
[16]	胡光义, 陈飞, 范廷恩, 等. 渤海海域S油田新近系明化镇组河流相复合砂体叠置样式分析[J]. 沉积学报, 2014, 32(3),586-592.
[17]	任双坡, 姚光庆, 毛文静. 三角洲前缘水下分流河道薄层单砂体成因类型及其叠置模式——以古城油田泌浅10区核三段Ⅳ-Ⅵ油组为例[J]. 沉积学报, 2016, 34(3): 582-593.
[18]	李振泉, 郑荣才. 胜坨油田胜一区沙二段上部高分辨率层序结构分析和叠加样式研究[J]. 石油勘探与开发, 2003, 30(4): 47-50.
[19]	施和生, 李文湘, 邹晓萍, 等. 层序地层学在珠江口盆地(东部)油田开发中的应用[J]. 中国海上油气(地质), 2000, 14(1): 15-20.
[20]	吴义杰, 高德群, 许江桥, 等. 一种自动识别高分辨率层序地层的方法及计算机实现[J]. 石油地球物理勘探, 2003, 38(2): 162-167.
[21]	王志坤, 王多云, 宋广寿, 等. 测井信号小波分析在高分辨率层序地层划分中的应用[J]. 东北石油大学学报, 2005, 29(6): 17-20.
[22]	路顺行, 张红贞, 孟恩, 等. 运用INPEFA技术开展层序地层研究[J]. 石油地球物理勘探, 2007, 42(6): 703-708.
[23]	薛欢欢, 李景哲, 李恕军, 等. INPEFA在高分辨率层序地层研究中的应用——以鄂尔多斯盆地油房庄地区长4+5油组为例[J]. 中国海洋大学学报(自然科学版), 2015, 45(7): 101-106.
[24]	周超宇, 陈恭洋, 梁卫, 等. 珠江口盆地惠州凹陷西江24-3油田沉积微相研究[J]. 海洋地质前沿, 2011(3): 1-5.
[25]	李胜利, 于兴河, 张志杰, 等. 珠江口盆地西江30-2油田新近系中新统沉积微相及层序地层分析[J]. 古地理学报, 2004, 6(1): 30-40.