转换斜坡型辫状河三角洲沉积特征：以珠江口盆地惠州凹陷始新统为例

陶文芳; 葛家旺; 雷永昌; 李旭彪; 朱筱敏

doi:10.19509/j.cnki.dzkq.tb20220202

转换斜坡型辫状河三角洲沉积特征：以珠江口盆地惠州凹陷始新统为例

doi: 10.19509/j.cnki.dzkq.tb20220202

1.
中海石油(中国)有限公司深圳分公司, 广东深圳 518054
2.
西南石油大学地球科学与技术学院, 成都 610050
3.
中国石油大学(北京)地球科学学院, 北京 102249

基金项目:

国家自然科学基金项目 41902124

构造与油气资源教育部重点实验室开放基金项目 2019-15

联合中海石油(中国)有限公司深圳分公司研究院生产性科研项目 SCKY-2023-SZ-03

详细信息

作者简介:
陶文芳(1988-), 女, 工程师, 主要从事珠江口盆地油气勘探及石油地质综合研究。E-mail: taowf@cnooc.com.cn

通讯作者:
葛家旺(1988-), 男, 副研究员, 主要从事定量层序地层学及构造-沉积学方面的科研和教学工作。E-mail: gjwddn@163.com

中图分类号: P618.130.2
计量
- 文章访问数: 604
- PDF下载量: 120
- 被引次数: 0
出版历程
- 收稿日期: 2022-05-09
- 录用日期: 2022-10-03
- 修回日期: 2022-08-29

Depositional characteristics of a relay ramp controlled braided deltaic system: A case study in the Eocene Huizhou Sag, Pearl River Mouth Basin, China

1.
Research Institute of Shenzhen Branch of CNOOC China Limited, Shenzhen Guangdong 518054, China
2.
College of Geosciences and Technology, Southwest Petroleum University, Chengdu 610050, China
3.
College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China

摘要

摘要:
珠江口盆地惠州凹陷始新世发育多个不同类型的转换斜坡(或称为构造转换带), 位于惠州26洼和西江30洼之间的HZ25转换斜坡控制并发育了一套大型近源辫状河三角洲体系。基于新处理的三维地震、钻(测)井、岩心及相关分析化验资料, 详细分析讨论了转换斜坡型辫状河三角洲砂体沉积特征。研究表明, 晚始新世时期气候炎热潮湿, 东沙隆起通过HZ25转换斜坡向惠州26洼输送充沛的物源碎屑, 发育厚层辫状河三角洲成因砂体, 粒度概率曲线和C-M图显示典型牵引流态特征; 砂岩以岩屑砂岩为主, 岩性粒度较粗、分选差, 磨圆度为棱角状-次棱角状; 岩心显示多期次冲刷界面、高角度斜层理、楔状交错层理等强水流动力沉积构造及间断性正韵律。转换斜坡是物源水系主要的运输通道, 辫状河三角洲向前推进距离约8 km, 整体形态为向北东方向展布的坨状或朵叶状。受控于转换斜坡古地貌格局, 辫状河三角洲具有水动力强、距物源较近且物源供给充足的特征, 砂地比平均值约52%。辫状河三角洲前缘砂体是优质储层发育带, 转换斜坡及其控制的厚层优质砂体耦合形成良好的地层-岩性圈闭, 是惠州凹陷深层主要勘探对象。研究区辫状河三角洲整体为一套低孔、低渗储层。辫状河三角洲前缘储层由于泥质杂基含量低, 分选改造中等, 以显孔-原生孔为主, 孔隙连通性较好, 是下一步油气优先勘探评价的对象。
- 辫状河三角洲 /
- 沉积特征 /
- 转换斜坡 /
- 惠州凹陷 /
- 珠江口盆地
Abstract: Objective
Tectonic transfer zones (or named as relay ramps) can have a profound impact on the drainages catchment, sediment dispersal and reservoirs distribution patterns; they are also important for hydrocarbon transport and accumulation processes. It is a hot object of current research interest to sedimentary geologists as well as petroleum geologists. A few different types of tectonic transfer zones are observed in the Eocene Huizhou Sag, the Pearl River Mouth Basin, South China Sea. The HZ25 area linking the Huizhou 26 and Xijiang 30 Sags is a typical overlapping transfer zone that controls the development of a large set of braided-deltaic system.
Methods
Based on newly acquired and processed high-quality 3D seismic data, three drilling logs, cores, and thin slices are utilized to discuss the characteristics of the relay ramp-controlled braided deltaic deposits and reservoirs in this paper.
Results
The results show that the Late Eocene climate was relatively hot and humid, and thus, abundant terrestrial clastic are collected and transported from the Dongsha Uplift source area via the HZ25 relay ramp routing system. Subsequently, a set of thick-bedded braided-delta deposits was deposited in the HZ26 Sag. The braided deltaic sandstones are generally coarse-grained with relatively poor sorting and roundness. It is dominated by mainly lithic sandstone. The particle size probability curve and C-M diagram display typical multiple traction flow characteristics. Large-scale cross bedding, high-angle inclined bedding and extensive scour surfaces in multistory fining-upwards cycles are common in core observations. It is implied that rich and hydrodynamic traction flow regimes are developed. The drainage dispersal pathways are redirected by the internal tectonic belts within the relay ramp, which are characterized by a large-scale but low-gradient (less than 3 degrees) physiographic slope. Strong hydrodynamic forces associated with facilitated deltaic drainage resulted in a high sand ratio of approximately 52% on average. The maximum advancement of the braided deltaic system is approximately 8 km, and its lobe-like geometry is strictly reorganized by the special tectonic-geomorphic pattern of the relay ramp zone.
Conclusion
The frontal deposits of the braided deltaic system have relatively good sandstone sorting, and thus, the relevant deposits are characterized by a higher porosity than those observed in the braided-delta plain. The good stratigraphic-lithological traps controlled by the relay ramp coupled with the multiple stages of thick-bedded braided-deltaic deposits are most important in this study area, which could be selected as an exploration potential area in the future. Additionally, the braided deltaic deposits in the study area are mainly dominated by low-porosity and low-permeability reservoirs. The reservoir in the frontal area of the braided deltaic deposits could be a priority exploration and evaluation target for petroleum resources due to its low mud content and miscellaneous bases, moderate sorting and good pore connectivity.
- braided delta /
- depositional characteristics /
- relay ramp /
- Huizhou Sag /
- Pearl River Mouth Basin
注释:

(所有作者声明不存在利益冲突)

HTML全文

图 1 惠州凹陷地理位置(a)、构造纲要(b)和HZ25转换斜坡井位和断层分布(c)

Figure 1. Tectonic location (a) and structural outline (b) of the Huizhou Sag and wells and fault distribution (c) in the HZ25 relay ramp

下载: 全尺寸图片幻灯片

图 2 珠江口盆地惠州凹陷地层综合柱状图^[22-24]

Figure 2. Comprehensive column of the Huizhou Sag, eastern Pearl River Mouth Basin

下载: 全尺寸图片幻灯片

图 3 HZ25转换斜坡古地貌-沉积体系-砂体含量对应关系

a.转换带地貌及物源通道，物源主要是NE向；b.砂体厚度等值线图；c.地震前积反射投影，前积优势方向为NE向；d.能量半波长地震属性平面图，反映砂体分布形态

Figure 3. Coupling relationship between ancient landform-sedimentary system-sand body content (c) in the HZ25 relay ramp

下载: 全尺寸图片幻灯片

图 4 惠州凹陷HZ25转换斜坡文昌组砂岩分选性(a)与磨圆性(b)

Figure 4. Sorting (a) and roundness (b) of the sandstones of the Wenchang Formation in the HZ25 relay ramp, Huizhou Sag

下载: 全尺寸图片幻灯片

图 5 惠州凹陷HZ25转换斜坡文昌组HA2井三角洲砂岩重矿物组合

Figure 5. Heavy mineral assemblages of the deltaic sandstones in the Wenchang Formation of the Well HA2 in the HZ25 relay ramp, Huizhou Sag

下载: 全尺寸图片幻灯片

图 6 惠州凹陷HZ25转换斜坡文昌组粒度概率累计曲线(a)和C-M图(b)(HA2井)

Figure 6. Cumulative probability curve (a) and C-M graph (b) of the Wenchang Formation (Well HA2) in the HZ25 relay ramp of the Huizhou Sag

下载: 全尺寸图片幻灯片

图 7 惠州凹陷HZ25转换斜坡型辫状河三角洲沉积构造特征

a.细砾岩，高角度交错层理：b.细砾岩，斜层理：c.含砾粗砂岩，块状层理；d.细砾岩，斜层理；e.粉砂岩，波状层理；f.含砾粗砂岩，高角度交错层理；g.细砾岩，交错层理；h.暗色块状泥岩；i.块状细砂岩；j.细砾岩，交错层理；k.具生物扰动的粉细砂岩；l.粗砂岩，高角度交错层理；m.细砾岩，斜层理、槽状交错层理及冲刷面；n.细砾岩及粗砂岩，冲刷面及正粒序；o.含砾粗砂岩，高角度斜层理

Figure 7. Sedimentary structures of the relay zone controlled braided delta in the HZ25 relay ramp of the Huizhou Sag

下载: 全尺寸图片幻灯片

图 8 惠州凹陷HA1和HA2井辫状河三角洲岩心素描图(岩心照片编号a~o详见图 7)

Figure 8. Characteristics of sedimentary sequence of drilling core in braideddelta deposits of Well HA1 and HA2, Huizhou Sag

下载: 全尺寸图片幻灯片

图 9 惠州凹陷HZ25转换斜坡型辫状河三角洲地震反射特征(地震测线A-A′和B-B′位置见图 3-c)

Figure 9. Seismic reflection characteristics of the braided delta in the HZ25 relay ramp of the Huizhou Sag

下载: 全尺寸图片幻灯片

图 10 惠州凹陷HZ25转换斜坡文昌组辫状河三角洲测井相特征

Figure 10. Logging facies of braid-river deltaic systems of the Wenchang Formation in the HZ25 relay ramp of the Huizhou Sag

下载: 全尺寸图片幻灯片

图 11 惠州凹陷HZ25转换斜坡型辫状河三角洲沉积微相演化剖面图(CoreA1和CoreA2岩心描述见图 8)

Figure 11. Cross section of the microfaices evolution of the braideddelta system in the HZ25 relay ramp of the Huizhou Sag

下载: 全尺寸图片幻灯片

图 12 惠州凹陷HZ25转换斜坡辫状河三角洲储层孔隙度(a)和渗透率(b)频率分布

Figure 12. Histogram of porosity (a) and permeability (b) of the braideddelta reservoir in the HZ25 relay ramp of the Huizhou Sag

下载: 全尺寸图片幻灯片

图 13 惠州凹陷HZ25转换斜坡型辫状河三角洲不同亚相储层特征

Figure 13. Characteristics of reservoir properties and pore structures in different sedimentary subfacies of braided deltas in the HZ25 relay ramp of the Huizhou Sag

下载: 全尺寸图片幻灯片

参考文献(32)

[1]	Dahlstrom C D A. Structural geology in the eastern margin of the Canadian Rocky Mountain[J]. Bulletin of Canadian Petroleum Geology, 1970, 18(3): 332-406.
[2]	Morley C K, Nelson R A, Patton T L, at al. Transfer zones in the East African Fift system and their relevance to hydrocarbon exploration in rifts[J]. AAPG Bulletin, 1990, 74(8): 1234-1253.
[3]	Gawthorpe R L, Hurst J M. Transfer zones in extensional basins: Their structural style and influence on drainage development and stratigraphy[J]. Journal of the Geological Society, 1993, 150(6): 1137-1152. doi: 10.1144/gsjgs.150.6.1137
[4]	漆家福. 裂陷盆地中的构造变换带及其石油地质意义[J]. 海相油气地质, 2007, 12(4): 43-50. https://www.cnki.com.cn/Article/CJFDTOTAL-HXYQ200704009.htm Qi J F. Structural transfer zones and significance for hydrocarbon accumulation in rifting basins[J]. Marine Origin Petroleum Geology, 2007, 12(4): 43-50(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-HXYQ200704009.htm
[5]	梁富康, 于兴河, 慕小水, 等. 东濮凹陷南部沙三中段构造调节带对沉积体系的控制作用[J]. 现代地质, 2011, 25(1): 55-61. https://www.cnki.com.cn/Article/CJFDTOTAL-XDDZ201101007.htm Liang F K, Yu X H, Mu X S, et al. Accommodation zones and their controls on depositional system in the middle of Third Member of Shahejie Formation, south of Dongpu Sag[J]. Geoscience, 2011, 25(1): 55-61(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-XDDZ201101007.htm
[6]	白小鸟, 焦养泉. 伸展盆地的转换斜坡: 控制储层发育与烃类运聚的重要构造单元[J]. 地质科技情报, 2011, 30(6): 44-54. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201106006.htm Bai X N, Jiao Y Q. Relay ramp in extensional basins: An important structure of reservoir deposition and hydrocarbon migration or accumulation[J]. Geological Science and Technology Information, 2011, 30(6): 44-54(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201106006.htm
[7]	Peacock D C P. Propagation, interaction and linkage in normal fault systems[J]. Earth-Science Reviws, 2002, 58: 121-142. doi: 10.1016/S0012-8252(01)00085-X
[8]	Trudgill B D. Structural controls on drainage development in the Canyonlands grabens of southeast Utah[J]. AAPG Bulletin, 2002, 86(6): 1095-1112.
[9]	Young M J, Gawthorpe R L, Sharp I R. Sedimentology and sequence stratigraphy of a transfer zone coarse-grained delta, Miocene Suez Rift, Egypt[J]. Sedimentology, 2000, 47(6): 1081-1104. doi: 10.1046/j.1365-3091.2000.00342.x
[10]	Young M J, Gawthorpe R L, Sharp I R. Architecture and evolution of syn-rift clastic depositional systems towards the tip of a major fault segment, Suez Rift, Egypt[J]. Basin Rearch, 2002, 14(1): 1-23. doi: 10.1046/j.1365-2117.2002.00162.x
[11]	Sohn Y K, Son M. Synrift stratigraphic geometry in a transfer zone coarse-grained delta complex, Miocene Pohang Basin, SE Korea[J]. Sedimentology, 2004, 51(6): 1387-1408. doi: 10.1111/j.1365-3091.2004.00679.x
[12]	Moustafa A R. Controls on the geometry of transfer zones in the Suez Rift and northwest Red Sea: Implications for the structural geometry of rift systems[J]. AAPG Bulletin, 2002, 86(6): 979-1002.
[13]	Oftedal B T, Andresen A, Muller R. Early Triassic syn-rift sedimentation at hold with hope, Northeast Greenland[J]. Onshore-Offshore Relationships on the North Atlantic Margin, 2005, 12: 191-206.
[14]	Gupta S, Underhill J R, Sharp I R, et al. Role of fault interactions in controlling synrift sediment dispersal patterns: Miocene, Abu Alaqa Group, Suez Rift, Sinai, Egypt[J]. Basin Research, 1999, 11(2): 167-189. doi: 10.1046/j.1365-2117.1999.00300.x
[15]	Rotevatn A, Tveranger J, Howell J A, et al. Dynamic investigation of the effect of a relay ramp on simulated fluid flow: Geocellular modeling of the Delicate Arch Ramp, Utah[J]. Petroleum Geoscience, 2009, 15(1): 45-58. doi: 10.1144/1354-079309-779
[16]	王向东, 王任, 石万忠, 等. 中国东部典型裂谷盆地构造活动特征及演化: 以松辽盆地孤店断陷为例[J]. 地质科技通报, 2022, 41(3): 85-95. doi: 10.19509/j.cnki.dzkq.2022.0089 Wang X D, Wang R, Shi W Z, et al. Tectonic characteristics and evolution of typical rift basins in eastern China: A case study in the Gudian area, Songliao Basin[J]. Bulletin of Geological Science and Technology, 2022, 41(3): 85-95(in Chinese with English abstract). doi: 10.19509/j.cnki.dzkq.2022.0089
[17]	葛家旺, 朱筱敏, 雷永昌, 等. 多幕裂陷盆地构造-沉积响应及陆丰凹陷实例分析[J]. 地学前缘, 2021, 28(1): 77-89. https://www.cnki.com.cn/Article/CJFDTOTAL-DXQY202101008.htm Ge J W, Zhu X M, Lei Y C, et al. Tectono-sedimentary development of multiphase rift basins: An example of the Lufeng Depression[J]. Earth Science Frontiers, 2021, 28(1): 77-89(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-DXQY202101008.htm
[18]	杨明慧. 渤海湾盆地变换构造特征及其成藏意义[J]. 石油学报, 2009, 30(6): 816-823. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB200906005.htm Yang M H. Transfer structure and its relation to hydrocarbon exploration in Bohai Bay Basin[J]. Acta Petrolei Sinica, 2009, 30(6): 816-823(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB200906005.htm
[19]	舒誉, 施和生, 杜家元, 等. 珠一坳陷古近系油气成藏特征及勘探方向[J]. 中国海上油气, 2014, 26(3): 37-42. https://www.cnki.com.cn/Article/CJFDTOTAL-ZHSD201403006.htm Shu Y, Shi H S, Du J Y, et al. Paleogene characteristics in hydrocarbon accumulation and exploration direction in Zhu I Depression[J]. China Offshore Oil and Gas, 2014, 26(3): 37-42(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-ZHSD201403006.htm
[20]	施和生, 于水明, 梅廉夫, 等. 珠江口盆地惠州凹陷古近纪幕式裂陷特征[J]. 天然气工业, 2009, 29(1): 35-40. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG200901012.htm Shi H S, Yu S M, Mei L F, et al. Features of Paleogene episodic rifting in Huizhou fault depression in the Pearl River Mouth Basin[J]. Natural Gas Industry, 2009, 29(1): 35-40(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG200901012.htm
[21]	葛家旺, 朱筱敏, 陶文芳, 等. 惠州凹陷HZ25转换带构造特征与成藏条件[J]. 西南石油大学学报: 自然科学版, 2017, 39(5): 19-30. https://www.cnki.com.cn/Article/CJFDTOTAL-XNSY201705003.htm Ge J W, Zhu X M, Tao W F, et al. The tectonic characteristics and analysis of hydrocarbon accumulation conditions in HZ25 transfer zone in Huizhou Sag, Pearl River Mouth Basin[J]. Journal of Southwest Petroleum University: Science and Technology Edition, 2017, 39(5): 19-30(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-XNSY201705003.htm
[22]	施和生, 何敏, 张丽丽, 等. 珠江口盆地(东部)油气地质特征、成藏规律及下一步勘探策略[J]. 中国海上油气, 2014, 26(3): 11-22. https://www.cnki.com.cn/Article/CJFDTOTAL-ZHSD201403002.htm Shi H S, He M, Zhang L L, et al. Hydrocarbon geology, accumulation pattern and the next exploration strategy in the eastern Pearl River Mouth Basin[J]. China Offshore Oil and Gas, 2014, 26(3): 11-22(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-ZHSD201403002.htm
[23]	李扬帆, 程超, 何贤科, 等. 惠州凹陷古近系优质烃源岩评价方法研究[J]. 海洋石油, 2015, 35(2): 40-45. https://www.cnki.com.cn/Article/CJFDTOTAL-HYSY201502013.htm Li Y F, Cheng C, He X K, et al. Evaluation methods for Paleogene source rocks in Huizhou Sag[J]. Offshore Oil, 2015, 35(2): 40-45(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-HYSY201502013.htm
[24]	张丽丽, 舒誉, 蔡国富, 等. 珠江口盆地东部始新世-渐新世沉积环境演变及对烃源条件的影响[J]. 石油学报, 2019, 40(增刊1): 153-165. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB2019S1013.htm Zhang L L, Shu Y, Cai G F, et al. Eocene-Oligocene sedimentary environment evolution and its impact on hydrocarbon source conditions in eastern Pearl River Mouth Basin[J]. Acta Petrolei Sinica, 2019, 40(S1): 153-165(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB2019S1013.htm
[25]	李振雄. 珠江口盆地LF13-2-1井始新统孢粉组合[J]. 中国海上油气, 1998, 12(3): 168-173. https://www.cnki.com.cn/Article/CJFDTOTAL-ZHSD199803006.htm Li Z X. Eocene Palynology of Well LF13-2-1 in Pearl River Mouth Basin[J]. China Offshore Oil and Gas, 1998, 12(3): 168-173(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-ZHSD199803006.htm
[26]	李洪博. 珠江口盆地惠州凹陷及东沙隆起结构构造特征、演化及其与油气成藏关系讨论[D]. 武汉: 中国地质大学, 2010: 41-54. Li H B. The features of construct and structure and the discussion of relationship between evolution with hydrocarbon reservoiring in Huizhou Depression and Dongsha Massif of Pearl River Mouth Basin[D]. Wuhan: China University of Geoscience, 2010: 41-54(in Chinese with English abstract).
[27]	Zhu H T, Yang X H, Liu K, et al. Seismic-based sediment provenance analysis in continental lacustrine rift basins: An example from the Bohai Bay Basin, China[J]. AAPG Bulletin, 2014, 98(10): 1995-2018.
[28]	梁杰, 刘杰, 牛胜利, 等. 珠江口盆地惠州25转换带文五段低位体系域源-渠-汇耦合关系[J]. 沉积学报, 2022, 40(6): 1451-1460. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB202206001.htm Liang J, Liu J, Niu S L, et al. Depostional model an source-to-sink characteristics of the lowstand system tract in the 5th member of the Wenchang Formation, Huizhou 25 transfer zone[J]. Acta Sedimentologica Sinica, 2022, 40(6): 1451-1460(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB202206001.htm
[29]	葛家旺, 朱筱敏, 潘荣, 等. 珠江口盆地惠州凹陷文昌组砂岩孔隙定量演化模式: 以HZ-A地区辫状河三角洲储层为例[J]. 沉积学报, 2015, 33(1): 183-193. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB201501019.htm Ge J W, Zhu X N, Pan R, et al. A quantitative porosity evolution model of sandstone for Wenchang Formation in Huizhou Depression, Pearl River Mouth Basin: A case study for braided fluvial delta reservoir of HZ-A area[J]. Acta Sedimentologica Sinica, 2015, 33(1): 183-193(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB201501019.htm
[30]	葛家旺, 秦成岗, 朱筱敏, 等. 惠州凹陷HZ25-7构造带文昌组低孔低渗砂岩储层特征和成因机理[J]. 岩性油气藏, 2014, 26(4): 36-43. https://www.cnki.com.cn/Article/CJFDTOTAL-YANX201404007.htm Ge J W, Qin C G, Zhu X M, et al. Characteristics and origin of low porosity and low permeability sandstone reservoir of Wenchang Formation in HZ25-7 structural belt of Huizhou Depression[J]. Lithologic Reservoirs, 2014, 26(4): 36-43(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-YANX201404007.htm
[31]	姚文礼. 四川盆地须家河组致密砂岩物源体系的控储作用[J]. 地质科技通报, 2021, 40(5): 223-230. doi: 10.19509/j.cnki.dzkq.2021.0036 Yao W L. Reservoir control of tight sandstone provenance system in Xujiahe Formation, Sichuan Basin[J]. Bulletin of Geological Science and Technology, 2021, 40(5): 223-230(in Chinese with English abstract). doi: 10.19509/j.cnki.dzkq.2021.0036
[32]	徐国盛, 崔恒远, 刘勇, 等. 东海盆地西湖凹陷古近系花港组砂岩储层致密化与油气充注关系[J]. 地质科技通报, 2020, 39(3): 20-29. doi: 10.19509/j.cnki.dzkq.2020.0303 Xu G S, Cui H Y, Liu Y, et al. Relationship between sandstone reservoirs densification and hydrocarbon charging in the Paleogene Huagang Formation of Xihu Depression, East China Sea Basin[J]. Bulletin of Geological Science and Technology, 2020, 39(3): 20-29(in Chinese with English abstract). doi: 10.19509/j.cnki.dzkq.2020.0303