Distribution Characteristics of Oolitic Beach in the 2nd and 3rd Members of Lower Triassic Feixianguan Formation, Southeastern Chongqing

doi:10.19657/j.geoscience.1000-8527.2022.100

Abstract

Abstract:

The Feixianguan Formation (FXGF) subdivision in southeastern Chongqing is established based on the lithologic-electrical identification mark by the outcrop measurement, thin-section microscopic observation, logging data and seismic data analysis.The distribution patterns of oolitic beach in the 2^nd and 3^rd members of FXGF are discussed.The results show that the stratigraphic framework of FXGF in southeastern Chongqing can be divided into four parts.The FXGF 1^st Member is mainly composed of limestone with the characteristics of 80~105 API GR value and 75~200 Ω·m LLD value.The FXGF 2^nd Member is mainly composed of micritic limestone and silty oolitic limestone.The GR value reduced to 11~31 API, and the resistivity value increased to 200~4205 Ω· m compared with the FXGF 2^nd Member.While the FXGF 3^rd Member is mainly composed of oolitic limestone and silty limestone.The logging value has little change compared with the FXGF 2^nd Member.Only the top and bottom of the FXGF 3^rd Member can be seen with high GR value.Argillaceous dolomite and argillaceous limestone are developed in the FXGF 4^th Member with GR value increasing to 35~66 API and resistivity decreasing to 74~280 Ω·m (compared with the FXGF 3^rd Member).In the study area, oolitic beach in the FXGF 2^nd Member is developed in Quxian-Liangping and Fengdu-Zhongxian-Lichuan areas.Oolitic beaches of the FXGF 3^rd Member were mainly developed around the Dianjiang-Liangping intertidal depression, which were distributed in a ring belt.The oolitic beach developed in the FXGF 3^rd Member is thicker, more connectivity, more widely distributed, and larger in scale than that in the FXGF 2^nd Member.The local sedimentary model during Feixianguan period is a rimmed carbonate platform.After clarifying the stratification scheme, we considered that the beach center in the platform migrated eastward with the regression during the 3^rd Member of Feixianguan period.

Key words: Southeast Chongqing, Lower Triassic, Feixianguan Formation, stratigraphic division, oolitic beach

CLC Number:

ZHAO Lingli, SONG Jinmin, YUAN Haifeng, XU Guaosheng, DENG Shuanglin, ZHAO Cong, JIN Xin, LI Liji, LI Pengwu, REN Jiaxin, LI Keran, FENG Yuxiang, FAN Jianping. Distribution Characteristics of Oolitic Beach in the 2^nd and 3^rd Members of Lower Triassic Feixianguan Formation, Southeastern Chongqing[J]. Geoscience, 2023, 37(05): 1208-1220.

Figures/Tables 12

Fig.1 Sedimentary facies of the 1st member of Feixianguan Formation in southeastern Chongqing(modified from refs.[17?-19])

Fig.2 Comprehensive column of Feixianguan Formation, Gongjiayakou section in southeastern Chongqing

Fig.3 Petrological characteristics of Feixianguan Formation in Gongjiayakou section, southeastern Chongqing

Table 1 Lithology and logging response characteristics of each member of Feixianguan Formation in southeasternChongqing

段	岩性	GR(API)			RD (Ω·m)		DEN (g·cm^-3)
段	岩性	形态	范围	平均值	范围	平均值	范围	平均值
飞四段	砂屑灰岩、泥晶灰岩、泥灰(云)岩	锯齿状	35~66	44.65	74~280	183	2.60~3.00	2.80
飞三段	砂屑鲕粒灰岩	近似平直	7~30	17.56	626~5717	3624	2.40~3.00	2.70
飞二段	砂屑灰岩、泥晶灰岩	近似平直	11~31	22.80	200~4205	2604	2.70~2.80	2.70
飞一段	泥灰岩	锯齿状	80~105	92.70	75~200	144	2.60~2.80	2.70

Fig.4 Comparison of connecting wells in Feixianguan Formation of well Linbei 1-well Gouxi 1-well Chi 54-well Yangdu 3- well Feng 12, southeastern Chongqing

Fig.5 Well seismic profiles (a) seismic synthetic records (b) and of each member of Feixianguan Formation in southeasternChongqing

Fig.6 Oolitic beach distribution of well Chi54 - well Chi55 - well Chi13 - well Fengl1 - well Feng12 in southeastern Chongqing

Fig.7 Oolitic beach distribution of well Linbei 1-well Gou 2-well Chi54- well Yangdu 3 in southeastern Chongqing

Fig.8 Distribution of oolitic beach of the 2nd member of Feixianguan Formation in southeastern Chongqing

Fig.9 Microscopic characteristics of oolitic beach and interbank depression in the 3rd member of Feixianguan Formation, southeastern Chongqing

Fig.10 Characteristics of sedimentary facies and seismic facies in the 3rd member of Feixianguan Formation, southeastern Chongqing

Fig.11 Sedimentary facies model of Feixianguan Formation in southeastern Chongqing

References 30

[1]	罗平, 张静, 刘伟, 等. 中国海相碳酸盐岩油气储层基本特征[J]. 地学前缘, 2008, 15(1): 36-50.
[2]	丁熊, 吴涵, 王兴志, 等. 四川盆地三叠系颗粒碳酸盐岩储层的成因类型[J]. 现代地质, 2017, 31(6): 1241-1250.
[3]	孙自明, 张荣强, 孙炜, 等. 四川盆地东部海相下组合油气勘探领域与有利勘探方向[J]. 现代地质, 2021, 35(3): 798-806.
[4]	冉隆辉, 陈更生, 张健, 等. 四川盆地东北部飞仙关组鲕滩储层分布研究与勘探潜力分析[J]. 中国石油勘探, 2002, 7(1): 46-55.
[5]	汪娟. 川东东部地区下三叠统飞仙关组沉积相及其对储层的控制[D]. 成都: 西南石油大学, 2006.
[6]	戴荔果, 郑荣才, 李爽, 等. 川东—渝北地区飞仙关组层序-岩相古地理特征[J]. 中国地质, 2009, 36(1): 110-119.
[7]	殷积峰, 谷志东, 李秋芬. 四川盆地大川中地区深层断裂发育特征及其地质意义[J]. 石油与天然气地质, 2013, 34(3): 376-382.
[8]	蒋裕强, 邓虹兵, 易娟子, 等. 开江—梁平海槽西侧飞仙关组不同类型鲕滩储层特征及其控制因素研究[J]. 特种油气藏, 2020, 27(1): 17-24.
[9]	谭秀成, 刘晓光, 陈景山, 等. 磨溪气田嘉二段陆表海碳酸盐岩台地内滩体发育规律[J]. 沉积学报, 2009, 27(5): 995-1001.
[10]	BERGMAN K L, WESTPHAL H, JANSON X, et al. Controlling parameters on facies geometries of the Bahamas, an isolated carbonate platform environment[M]// Carbonate Depositional Systems:Assessing Dimensions and Controlling Parameters. Dordrecht: Springer, 2010: 5-80.
[11]	TAN X C, LIU H, LI L, et al. Primary intergranular pores inoolitic shoal reservoir of lower Triassic Feixianguan formation, Sichuan Basin, Southwest China: Fundamental for reservoir formation and retention diagenesis[J]. Journal of Earth Science, 2011, 22(1): 101-114. DOI URL
[12]	邬光辉, 李启明, 张宝收, 等. 塔中Ⅰ号断裂坡折带构造特征及勘探领域[J]. 石油学报, 2005, 26(1): 27-30, 37. DOI
[13]	FANG Y H, CHEN Z Q, KERSHAW S, et al. An Early Triassic (Smithian) stromatolite associated with giant ooid banks from Lichuan (Hubei Province), South China: Environment and controls on its formation[J]. Palaeogeography, Palaeoclimatology, Palaeoecology, 2017, 486: 108-122. DOI URL
[14]	陈晓东. 川东涪陵地区飞仙关组储层预测研究[D]. 成都: 成都理工大学, 2019.
[15]	徐敏, 梁虹, 王兰英, 等. 四川盆地飞仙关组多期鲕滩储层分布特征及迁移模式[J]. 石油物探, 2021, 60(3): 496-504. DOI
[16]	黄先平. 川东北地区下三叠统飞仙关组储层综合研究[D]. 成都: 西南石油学院, 2004.
[17]	钟怡江. 川东北长兴期—须家河期构造-沉积演化[D]. 成都: 成都理工大学, 2012.
[18]	康少伟, 刘宏, 罗冰, 等. 川东北铁山—黄泥塘地区飞仙关组鲕滩沉积特征及分布规律[J]. 石油地质与工程, 2012, 26(5): 20-24, 158.
[19]	王启颖, 李才良, 王达俊, 等. 川东飞仙关组鲕滩气藏控制因素及其储集条件研究[J]. 海洋石油, 2007, 27(3): 64-69.
[20]	谢淑云, 雷蕾, 焦存礼, 等. 鲕粒白云岩内部溶蚀及孔隙非均质性演化研究[J]. 现代地质, 2019, 33(6): 1174-1187.
[21]	杨雨, 张静, 张光荣. 川东下三叠统飞仙关组鲕滩分布及其天然气勘探前景[J]. 成都理工大学学报(自然科学版), 2000, 27(增): 147-150.
[22]	刘南, 董明, 王金刚, 等. 铁山坡以西地区飞仙关组地层特征研究[J]. 内江科技, 2013, 34(6): 78-79.
[23]	LIU C, XIE Q B. Depositional, sedimentary, and diagenetic controls on reservoir quality in carbonate successions: A case study from the carbonate gas reservoirs of the Lower TriassicFeixianguan Formation, eastern Sichuan Basin, China[J]. Journal of Petroleum Science and Engineering, 2018, 163: 484-500. DOI URL
[24]	徐丹舟. 大竹—达县地区下三叠统飞仙关组沉积相研究[D]. 成都: 西南石油学院, 2004.
[25]	王一刚, 张静, 刘兴刚, 等. 四川盆地东北部下三叠统飞仙关组碳酸盐蒸发台地沉积相[J]. 古地理学报, 2005, 7(3): 357-371.
[26]	宋海敬, 胡明毅, 喻高明, 等. 鄂西渝东地区飞仙关组层序地层学研究[J]. 石油天然气学报, 2009, 31(4): 207-209, 430.
[27]	郑荣才, 罗平, 文其兵, 等. 川东北地区飞仙关组层序-岩相古地理特征和鲕滩预测[J]. 沉积学报, 2009, 27(1): 1-8.
[28]	XIE Q B, WANG Z F, OUYANG Y L, et al. Sequence stratigraphy and sedimentary facies of Feixianguan Formation in the Kaijiang-Liangping area of Sichuan Basin, China[J]. Open Journal of Geology, 2020, 10(6): 641-660. DOI URL
[29]	唐丹. 川东北龙岗地区飞仙关组层序地层与储层特征研究[D]. 成都: 西南石油大学, 2012.
[30]	胡忠贵, 胡明毅, 廖军, 等. 鄂西建南地区长兴组沉积相及生物礁沉积演化模式[J]. 天然气地球科学, 2014, 25(7): 980-990.