The sedimentary characteristics of tidal delta and tidal flat in transgressive system tract of Pinghu Formation in Pinghu area, Xihu Sag

LIU Yinghui; CAI Hua; DUAN Dongping; RONG Chengrui; CHANG Yinshan; XU Qinghai

doi:10.16028/j.1009-2722.2021.147

2022 Vol. 37, No. 1

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Article navigation > Marine Geology Frontiers > 2022 > 38(1): 33-40

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LIU Yinghui, CAI Hua, DUAN Dongping, RONG Chengrui, CHANG Yinshan, XU Qinghai. The sedimentary characteristics of tidal delta and tidal flat in transgressive system tract of Pinghu Formation in Pinghu area, Xihu Sag[J]. Marine Geology Frontiers, 2022, 38(1): 33-40. doi: 10.16028/j.1009-2722.2021.147

Citation:

LIU Yinghui, CAI Hua, DUAN Dongping, RONG Chengrui, CHANG Yinshan, XU Qinghai. The sedimentary characteristics of tidal delta and tidal flat in transgressive system tract of Pinghu Formation in Pinghu area, Xihu Sag[J]. Marine Geology Frontiers, 2022, 38(1): 33-40. doi: 10.16028/j.1009-2722.2021.147

The sedimentary characteristics of tidal delta and tidal flat in transgressive system tract of Pinghu Formation in Pinghu area, Xihu Sag

1.
Shanghai Branch of CNOOC Ltd., Shanghai 200335, China
2.
CNOOC Research Institute Co., Ltd.，Beijing 100028, China
3.
School of Geosciences, Yangtze University, Wuhan 430100, China

Received Date: 24 May 2021

Accepted Date: 17 November 2021

Publish Date: 28 January 2022

Abstract

Abstract

The Pinghu Formation of Eocene in the Pinghu area of Xihu Sag is a set of transitional deposits consisting of alternative marine and non-marine depositional systems, which are characterized by thinly interbedded sand, mud and coal seams of deltaic-tidal transitional facies. Due to the complexity of sedimentary structures and the diversity of sedimentary microfacies, it has remained controversial among scholars about their origin and depositional systems. The uncertainty of sedimentary system restricted oil and gas exploration and development. Based on the core, logging and other analysis data from the Pinghu Formation, this paper defined the typical facies types and described their sedimentary characteristics for the P7 layer formed in the transgressive domain in the first and second stages of Pinghu Period. By means of seismic sedimentology, typical tidal delta is recognized and the depositional characteristics of tidal delta in the transgressive summarized. The sandbodies of tide-dominated delta are strongly reformed by tide. There develop such typical sedimentary structures as double clay layers, reaction surface, rhythmic bedding and tidal bundles. The tide dominated delta is mainly composed of the subfacies of inner and outer deltaic fronts, with deltaic plain locally. During the transgression period, the sea level rose rapidly, the delta front was strongly reworked by tide, and as the result, the sand bodies dominated by tidal bars and tidal channels were formed. It is believed that the establishment of tide-dominated deltaic sedimentary model in this paper may provided a clue and guideline for further exploration and development of oil and gas in the Pinghu Formation of the Xihu Sag.
- tide dominated delta /
- tide flat /
- depositional model /
- transgressive system tract /
- Pinghu Formation /
- Xihu Sag

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References

[1]	蔡华,秦兰芝,刘英辉. 西湖凹陷平北斜坡带海陆过渡相源-汇系统差异性及其耦合模式[J]. 地球科学,2019,44(3):881-897. Google Scholar
[2]	周心怀. 西湖凹陷地质认识创新与油气勘探领域突破[J]. 中国海上油气,2020,32(1):1-12. Google Scholar
[3]	何玉平. 东海盆地西湖凹陷天台区始新世平湖组风暴岩的发现及其地质意义[J]. 吉林大学学报(地球科学版),2020,50(3):500-508. Google Scholar
[4]	周荔青,江东辉,张尚虎,等. 东海西湖凹陷大中型油气田形成条件及勘探方向[J]. 石油实验地质,2020,42(5):803-812. doi: 10.11781/sysydz202005803 CrossRef Google Scholar
[5]	JIA H B,JI H C,LI X W,et al. A retreating fan-delta system in the northwestern Junggar Basin, Northwestern China: characteristics, evolution and controlling factors[J]. Journal of Asian Earth Sciences,2016,123:162-177. doi: 10.1016/j.jseaes.2016.04.004 CrossRef Google Scholar
[6]	MUHAMMAD M S,JULIEN B. Seismic geomorphology and evolution of Early-Mid Miocene isolated carbonate build-ups in the Timor Sea, northwest shelf of Australia[J]. Marine Geology,2016,379:224-245. doi: 10.1016/j.margeo.2016.06.007 CrossRef Google Scholar
[7]	ZENG H L. Seismic geomorphology-based facies classification[J]. The Leading Edge,2004,23(7):644-688. doi: 10.1190/1.1776732 CrossRef Google Scholar
[8]	ZENG H L,ZHU X M,ZHU R K,et al. Guidelines for seismic sedimentologic study in non-marine post rift basins[J]. Petroleum Exploration and Development,2012,39(3):275-284. Google Scholar
[9]	任建业,胡祥云,张俊霞. 中国大陆东部晚中生代构造活动及其演化过程[J]. 大地构造与成矿学,1998,22(2):89-96. Google Scholar
[10]	李顺利,许磊,于兴河,等. 东海陆架盆地西湖凹陷渐新世海侵作用与潮控体系沉积特征[J]. 古地理学报,2018,20(6):1023-1032. doi: 10.7605/gdlxb.2018.06.075 CrossRef Google Scholar
[11]	侯国伟,李帅,秦兰芝,等. 西湖凹陷西部斜坡带平湖组源-汇体系特征[J]. 中国海上油气,2019,31(3):29-38. Google Scholar
[12]	于兴河,李顺利,曹冰,等. 西湖凹陷渐新世层序地层格架与沉积充填响应[J]. 沉积学报,2017,35(2):299-314. Google Scholar
[13]	秦兰芝,刘金水,李帅,等. 东海西湖凹陷中央反转带花港组锆石特征及物源指示意义[J]. 石油实验地质,2019,39(4):498-504. doi: 10.11781/sysydz201904498 CrossRef Google Scholar
[14]	张兰,汪文基,何贤科,等. 东海西湖凹陷平湖组富煤环境相控储层预测技术[J]. 现代地质,2019,33(2):337-344. Google Scholar
[15]	张兰,李文俊,常吟善,等. 东海某凹陷断陷期重要不整合面特征及其对沉积演化的控制[J]. 海洋地质与第四纪地质,2019,40(4):30-39. Google Scholar
[16]	常吟善,覃军,赵洪,等. 基于米氏旋回理论的高频层序识别与划分:以东海陆架盆地平湖斜坡带宝云亭地区平三段为例[J]. 海洋地质与第四纪地质,2018,39(3):51-60. Google Scholar
[17]	刘英辉,黄导武,段冬平,等. 煤层等时格下中深层储层地震沉积学预测[J]. 沉积学报,2018,36(5):957-968. Google Scholar
[18]	陆俊泽,叶加仁,黄胜兵,等. 西湖凹陷平北地区烃源岩特征及生排烃史[J]. 海洋石油,2009,29(4):38-43. doi: 10.3969/j.issn.1008-2336.2009.04.038 CrossRef Google Scholar
[19]	许红,张海洋,张柏林,等. 南黄海盆地26口钻井特征[J]. 海洋地质前沿,2015,31(4):1-6. Google Scholar
[20]	谭思哲,陈春峰,徐振中,等. 南黄海古生界烃源特征及资源潜力评估[J]. 海洋地质与第四纪地质,2018,38(3):116-124. Google Scholar
[21]	王丽顺,陈琳琳. 东海西湖凹陷下第三系层序地层学分析[J]. 海洋地质与第四纪地质,1994,14(3):35-42. Google Scholar
[22]	冯晓杰. 东海陆架盆地中新生代构造演化特征[J]. 中国海上油气(地质),2003,17(1):33-37. Google Scholar
[23]	武法东. 东海陆架盆地西湖凹陷第三系层序地层与沉积体系分析[M]. 北京: 地质出版社, 2000: 20-41 . Google Scholar
[24]	陈琳琳. 东海西湖凹陷平湖组沉积环境演化[J]. 海洋地质与第四纪地质,1998,18(4):69-78. Google Scholar
[25]	ANDREW D M,CHARLENE E M. Sequence stratigraphy as a scientific enterprise: the evolution and persistence of conflicting paradigms[J]. Earth-Science Reviews,2001,54:321-348. doi: 10.1016/S0012-8252(00)00041-6 CrossRef Google Scholar
[26]	OCTAVIAN C. Principles of Sequence Stratigraphy[M]. Amsterdam: Elsevier, 2006: 35-54. Google Scholar
[27]	刘晓晖,涂齐催,姜雨,等. 双宽地震资料在西湖凹陷R气田裂缝预测中的应用[J]. 海洋地质前沿,2020,36(8):57-64. Google Scholar
[28]	刘亚茹,高顺莉,周平,等. 西湖凹陷转换断裂发育特征及其油气地质意义[J]. 海洋地质前沿,2020,36(10):42-49. Google Scholar