Lithologic Reservoirs ›› 2023, Vol. 35 ›› Issue (6): 82-91.doi: 10.12108/yxyqc.20230610

• PETROLEUM EXPLORATION • Previous Articles     Next Articles

Exploration potential of lithologic reservoirs of Cretaceous AG Formation in Fula Sag,Muglad Basin,Africa

LIU Jiguo, ZHOU Hongpu, QIN Yanqun, ZOU Quan, ZHENG Fengyun, LI Zaohong, XIAO Gaojie   

  1. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China
  • Received:2023-06-02 Revised:2023-07-10 Online:2023-11-01 Published:2023-11-07

PDF (PC)

209

Abstract: Referring to the domestic exploration theory and technology of lithologic oil and gas reservoirs in fault basins,sequence stratigraphy analysis method was used to carry out multi-scale sequence stratigraphy division,geochemical analysis of source rocks,research on hydrocarbon accumulation rules,favorable zone division and potential evaluation of Fula Sag in Muglad Basin of Central African Rift System. The results show that:（1）Five third-order sequences can be identified based on the sea level changes,and the flooding surface is the most favorable vertical location for lithologic reservoirs.（2）There are three major provenance systems in AG Formation in the study area. Fula-west steep slope belt is short-axis with rapid deposition and narrow distribution of facies zones. Braided river delta system is continuously developed with wide distribution in the northeastern part of the study area,and braided river delta system is limited developed in the southeastern part at the later period. The delta front and beach bar in shore-shallow lacustrine are the most favorable sedimentary facies for lithologic reservoirs.（3）Grey-dark mudstones developed in AG2 member（SQ4 sequence）of AG Formation are mainly deposited in shallow lake to semi-deep lake environment. The kerogen is type Ⅰ-Ⅱ1,the average total organic carbon（TOC）content is 3.41%,and the hydrocarbon generation potential（S1+ S2）is greater than 8 mg/g,which are good-excellent source rocks and the material basis for the forming of structural-lithologic reservoirs.（4）The AG Formation can be divided into seven lithologic reservoirs zones,among which the northern Fula-Moga slope zone has favorable conditions for hydrocarbon accumulation and great exploration potential.

Key words: lithologic reservoirs, flooding surface, delta front, beach bar, lithologic zones, Fula-Moga slope zone, AG Formation, Cretaceous, Fula Sag, Muglad Basin

CLC Number: 

  • TE121.3+1
[1] LEVORSEN A I. The obscure and subtle trap[J]. AAPG Bulletin,1966,50(10):2058-2067.
[2] 邹才能,袁选俊,陶士振,等.岩性地层油气藏[M].北京:石油工业出版社,2010.ZOU Caineng,YUAN Xuanjun,TAO Shizhen,et al. Lithologic stratigraphic reservoirs[M]. Beijing:Petroleum Industry Press,2010.
[3] 贾承造,赵文智,邹才能,等.岩性地层油气藏地质理论与勘探技术[J].石油勘探与开发,2007,34(3):257-272.JIA Chengzao,ZHAO Wenzhi,ZOU Caineng,et al. Geological theory and exploration technology for lithostratigraphic hydrocarbon reservoirs[J]. Petroleum Exploration and Development,2007,34(3):257-272.
[4] 牛嘉玉,侯启军,祝永军,等.岩性和地层油气藏地质与勘探[M].北京:石油工业出版社,2007.NIU Jiayu,HOU Qijun,ZHU Yongjun,et al. Geology and exploration for lithostratigraphic reservoirs[M]. Beijing:Petroleum Industry Press,2007.
[5] 李丕龙,金之钧,张善文,等.济阳坳陷油气勘探现状及主要研究进展[J].石油勘探与开发,2003,30(3):1-4.LI Pilong,JIN Zhijun,ZHANG Shanwen,et al. The present research status and progress of petroleum exploration in the Jiyang Depression[J]. Petroleum Exploration and Development,2003,30(3):1-4.
[6] 贾承造,赵文智,邹才能,等.岩性地层油气藏勘探研究的两项核心技术[J].石油勘探与开发,2004,31(3):3-9.JIA Chengzao,ZHAO Wenzhi,ZOU Caineng,et al. Two key technologies about exploration of stratigraphic/lithological reservoirs[J]. Petroleum Exploration and Development,2004,31(3):3-9.
[7] 杜家元,丁琳,张向涛,等.珠江口盆地惠州凹陷西南部新近系岩性油气藏勘探思路与关键技术[J].石油实验地质,2017,39(6):858-864.DU Jiayuan,DING Lin,ZHANG Xiangtao,et al. Exploration approach and techniques for the Neogene lithological reservoirs in the southwestern Huizhou Sag,Pearl River Mouth Basin[J].Petroleum Geology&Experiment,2017,39(6):858-864.
[8] 朱如凯,崔景伟,毛治国,等.地层油气藏主要勘探进展及未来重点领域[J].岩性油气藏,2021,33(1):12-24.ZHU Rukai,CUI Jingwei,MAO Zhiguo,et al. Main exploration progress and future key fields of stratigraphic reservoirs[J]. Lithologic Reservoirs,2021,33(1):12-24.
[9] 窦立荣,潘校华,田作基,等.苏丹裂谷盆地油气藏的形成与分布:兼与中国东部裂谷盆地对比分析[J].石油勘探与开发,2006,33(3):255-261.DOU Lirong,PAN Xiaohua,TIAN Zuoji,et al. Hydrocarbon formation and distribution of rift basins in Sudan:A comparative analysis of them with rift basins in East China[J]. Petroleum Exploration and Development,2006,33(3):255-261.
[10] 芮志锋,林畅松,杜家元,等.关键层序界面识别及其在岩性油气藏勘探中的意义:以惠州凹陷珠江组为例[J].岩性油气藏,2019,31(1):96-105.RUI Zhifeng,LIN Changsong,DU Jiayuan,et al. Key sequence surfaces identification and its significance in the exploration of lithologic reservoirs:A case of Zhujiang Formation in Huizhou Depression[J]. Lithologic Reservoirs,2019,31(1):96-105.
[11] 牛成民,杜晓峰,王启明,等.渤海海域新生界大型岩性油气藏形成条件及勘探方向[J].岩性油气藏,2022,34(3):1-14.NIU Chengmin,DU Xiaofeng,WANG Qiming,et al. Formation conditions and exploration direction of large-scale lithologic reservoirs of Cenozoic in Bohai Sea[J]. Lithologic Reservoirs,2022,34(3):1-14.
[12] 张光亚,黄彤飞,刘计国,等.中西非叠合裂谷盆地形成与演化[J].岩石学报,2022,38(9):2539-2553.ZHANG Guangya,HUANG Tongfei,LIU Jiguo,et al. Formation and evolution of West and Central African superimposed rift basins[J]. Acta Petrologica Sinica,2022,38(9):2539-2553.
[13] 张艺琼,何登发,童晓光.中非剪切带含油气盆地成因机制与构造类型[J].石油学报,2015,36(10):1234-1247.ZHANG Yiqiong,HE Dengfa,TONG Xiaoguang. Genetic mechanisms and tectonic types of petroliferous basins in the Central Africa Shear Zone[J]. Acta Petrolei Sinica,2015,36(10):1234-1247.
[14] 窦立荣,程顶胜,於拥军,等.据磷灰石裂变径迹和镜质体反射率重建苏丹Muglad盆地北部的构造-热演化历史[J].石油学报,2021,42(8):986-1002.DOU Lirong,CHENG Dingsheng,YU Yongjun,et al. Tectonicthermal evolution history reconstruction of the northern Muglad Basin in Sudan based on apatite fission track analysis and vitrinite reflectance data[J]. Acta Petrolei Sinica,2021,42(8):986-1002.
[15] 汪望泉,窦立荣,张志伟,等.苏丹福拉凹陷转换带特征及其与油气的关系[J].石油勘探与开发,2007,34(1):124-127.WANG Wangquan,DOU Lirong,ZHANG Zhiwei,et al. Transfer zone character and its relationship to hydrocarbon in Fula Sag,Sudan[J]. Petroleum Exploration and Development,2007,34(1):124-127.
[16] 黄彤飞,张荻萩,李曰俊,等.苏丹Muglad盆地Fula凹陷福西陡坡带变换构造特征及控藏作用[J].中国石油勘探,2020,25(4):105-114.HUANG Tongfei,ZHANG Diqiu,LI Yuejun,et al. Characteristics of transfer structure and hydrocarbon accumulation control of Fula western steep slope belt in the Fula Sag,Muglad Basin,Sudan[J]. China Petroleum Exploration,2020,25(4):105-114.
[17] 吴冬,朱筱敏,刘常妮,等. Fula凹陷中央转换带对岩性油气藏勘探的意义:以Abu Gabra组为例[J].岩性油气藏,2017,29(4):64-72.WU Dong,ZHU Xiaomin,LIU Changni,et al. Significance of central transfer zone on lithologic reservoir exploration:A case of Abu Gabra Formation in Fula Sag,Muglad Basin,Sudan[J]. Lithologic Reservoirs,2017,29(4):64-72.
[18] 杨俊生,朱筱敏.苏丹Muglad盆地Fula坳陷白垩系Abu Gabra组层序地层及沉积体系[J].沉积学报,2008,26(6):994-1004.YANG Junsheng,ZHU Xiaomin. Lower cretaceous sequence stratigraphy of Fula Depression,Muglad Basin,Sudan[J]. Acta Sedimentologica Sinica,2008,26(6):994-1004.
[19] 陈诚,朱怡翔,石军辉,等.断陷湖盆浅水三角洲的形成过程与发育模式:以苏丹Muglad盆地Fula凹陷Jake地区AG组为例[J].石油学报,2016,37(12):1508-1517.CHEN Cheng,ZHU Yixiang,SHI Junhui,et al. The forming process and development pattern of shallow water delta in fault depression lacustrine basin:A case study of AG Formation in the Jake area in Fula Sag,Muglad Basin,Sudan[J]. Acta Petrolei Sinica,2016,37(12):1508-1517.
[20] 胥菊珍,罗小平,王海宏.东非M盆地福拉凹陷烃源岩及原油地球化学特征[J].石油勘探与开发,2003,30(4):122-126.XU Juzhen,LUO Xiaoping,WANG Haihong. Source rock evaluation and crude oil geochemistry in the Fula Depression,M-Basin,East Africa[J]. Petroleum Exploration and Development,2003,30(4):122-126.
[21] 李威,窦立荣,张光亚,等.苏丹Muglad盆地Fula坳陷油气地球化学特征与成藏意义[J].地学前缘,2018,25(2):121-129.LI Wei,DOU Lirong,ZHANG Guangya,et al. Geochemical characteristics of crude oil and their implications for hydrocarbon accumulation in the Fula sub-basin,Muglad Basin,Sudan[J]. Earth Science Frontiers,2018,25(2):121-129.
[22] 毛凤军,肖洪,刘计国,等.中非裂谷系Muglad盆地下白垩统烃源岩非均质性及其启示[J].西安石油大学学报(自然科学版),2022,37(6):11-21.MAO Fengjun,XIAO Hong,LIU Jiguo,et al. Organic geochemical heterogeneity of Lower Cretaceous source rock in Muglad Basin Central African Rift System and its implications for petroleum exploration[J]. Journal of Xi’an Shiyou University(Natural Science Edition),2022,37(6):11-21.
[23] 曾雨晴.苏丹Muglad盆地烃源岩和原油的地球化学特征[D].北京:中国石油大学(北京),2019.ZENG Yuqing. Geochemical characteristics study of source rocks and crude oils in the Muglad Basin,Sudan[D]. Beijing:China University of Petroleum(Beijing),2019.
[24] 张亚敏,赵万优,陈向军,等.苏丹穆格莱德盆地Fula凹陷油气富集特征[J].现代地质,2008,22(4):634-639.ZHANG Yamin,ZHAO Wanyou,CHEN Xiangjun,et al. Hydrocarbon enrichment patterns of Bonanza pool in Fula Depression of Muglad Basin,Sudan[J]. Geoscience,2008,22(4):634-639.
[25] 刘淑文,李志,潘校华,等.苏丹富油气凹陷岩性油气藏区带评价探讨:以Muglad盆地Fula凹陷为例[J].中国石油勘探,2017,22(2):90-98.LIU Shuwen,LI Zhi,PAN Xiaohua,et al. Play evaluation on lithologic reservoirs in hydrocarbon-rich sags in Sudan:A case study on Fula sag,Muglad Basin[J]. China Petroleum Exploration,2017,22(2):90-98.
[26] 李建忠,赵文智,胡素云,等.岩性地层型油气聚集区带的基本特征[J].石油学报,2007,28(1):14-19.LI Jianzhong,ZHAO Wenzhi,HU Suyun,et al. Principal features of stratigraphic-lithological hydrocarbon accumulation zone[J]. Acta Petrolei Sinica,2007,28(1):14-19.
[1] QU Weihua, TIAN Ye, DONG Changchun, GUO Xiaobo, LI Lili, LIN Siya, XUE Song, YANG Shihe. Characteristics of Cretaceous source rocks and their controlling effect on hydrocarbon accumulation in Dehui Fault Depression，Songliao Basin [J]. Lithologic Reservoirs, 2024, 36(6): 122-134.
[2] XIAO Boya. Characteristics and favorable zone distribution of tuff reservoirt of Cretaceous in A’nan sag，Erlian Basin [J]. Lithologic Reservoirs, 2024, 36(6): 135-148.
[3] WANG Hongxing, HAN Shiwen, HU Jia, PAN Zhihao. Prediction and main controlling factors of tuff reservoirs of Cretaceous Huoshiling Formation in Dehui fault depression，Songliao Basin [J]. Lithologic Reservoirs, 2024, 36(5): 35-45.
[4] YI Zhenli, SHI Fang, YIN Taiju, LI Bin, LI Meng, LIU Liu, WANG Zhukun, YU Ye. Provenance transformation and sedimentary filling response of Mesozoic in Halahatang-Hade area，Tarim Basin [J]. Lithologic Reservoirs, 2024, 36(5): 56-66.
[5] ZHOU Hongfeng, WU Haihong, YANG Yuxi, XIANG Hongying, GAO Jihong, HE Haowen, ZHAO Xu. Sedimentary characteristics of fan delta front of the fourth member of Cretaceous A’ershan Formation in Bayindulan Sag，Erlian Basin [J]. Lithologic Reservoirs, 2024, 36(4): 85-97.
[6] TIAN Ya, LI Junhui, CHEN Fangju, LI Yue, LIU Huaye, ZOU Yue, ZHANG Xiaoyang. Tight reservoir characteristics and favorable areas prediction of Lower Cretaceous Nantun Formation in central fault depression zone of Hailar Basin [J]. Lithologic Reservoirs, 2024, 36(4): 136-146.
[7] MOU Feisheng, YIN Xiangdong, HU Cong, ZHANG Haifeng, CHEN Shijia, DAI Linfeng, LU Yifan. Distribution characteristics and controlling factors of tight oil of Triassic Chang 7 member in northern Shaanxi area，Ordos Basin [J]. Lithologic Reservoirs, 2024, 36(4): 71-84.
[8] YANG Weihua. Hydrocarbon accumulation model and main controlling factors of tight oil of the fourth member of Cretaceous Yingcheng Formation in Shuangcheng fault depression，Songliao Basin [J]. Lithologic Reservoirs, 2024, 36(4): 25-34.
[9] HE Wenyuan, ZHAO Ying, ZHONG Jianhua, SUN Ningliang. Characteristics and significance of micron pores and micron fractures in shale oil reservoirs of Cretaceous Qingshankou Formation in Gulong sag，Songliao Basin [J]. Lithologic Reservoirs, 2024, 36(3): 1-18.
[10] LONG Shengfang, HOU Yunchao, YANG Chao, GUO Yixuan, ZHANG Jie, ZENG Yali, GAO Nan, LI Shanghong. Sequence stratigraphy and evolution of Triassic Chang 7 to Chang 3 mebers in Qingcheng area，southwestern Ordos Basin [J]. Lithologic Reservoirs, 2024, 36(1): 145-156.
[11] HONG Guoliang, WANG Hongjun, ZHU Houqin, BAI Zhenhua, WANG Wenwen. Hydrocarbon accumulation conditions and favorable zones of lithologic reservoirs of Miocene Gumai Formation in block J,South Sumatra Basin [J]. Lithologic Reservoirs, 2023, 35(6): 138-146.
[12] SHI Buqing, DING Liangbo, MA Hongxia, SUN Hui, ZHANG Ying, XU Xiaoyong, WANG Hongping, FAN Guozhang. Characteristics of hydrocarbon accumulation in deep-water depositional system in offshore East Africa [J]. Lithologic Reservoirs, 2023, 35(6): 10-17.
[13] MA Wenjie, WAGN Jingchun, TIAN Zuoji, MA Zhongzhen, WAN Xuepeng, LIN Jincheng, XU Xianglin, ZHOU Yubing. Accumulation model and favorable area prediction of structural-lithologic composite reservoirs in block W,the slope zone of Oriente Basin,South America [J]. Lithologic Reservoirs, 2023, 35(6): 29-36.
[14] XIA Mingjun, SHAO Xinjun, YANG Hua, WANG Zhongsheng, LI Zhiyu, ZHANG Chaoqian, YUAN Ruier, FA Guifang. Classification and categorization method of overseas lithologic reservoir reserves [J]. Lithologic Reservoirs, 2023, 35(6): 37-44.
[15] FAN Rui, LIU Hui, YANG Peiguang, SUN Xing, MA Hui, HAO Fei, ZHANG Shanshan. Identification of carbonate dissolution valleys filled with mudstones of Cretaceous in block A,Oman Basin [J]. Lithologic Reservoirs, 2023, 35(6): 72-81.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] YANG Qiulian, LI Aiqin, SUN Yanni, CUI Panfeng. Classification method for extra-low permeability reservoirs[J]. Lithologic Reservoirs, 2007, 19(4): 51 -56 .
[2] ZHANG Jie, ZHAO Yuhua. Seismic sequence of Triassic Yanchang Formation in Ordos Basin[J]. Lithologic Reservoirs, 2007, 19(4): 71 -74 .
[3] YANG Zhanlong,ZHANG Zhenggang,CHEN Qilin,GUO Jingyi,SHA Xuemei,LIU Wensu. Using multi-parameters analysis of seismic information to evaluate lithologic traps in continental basins[J]. Lithologic Reservoirs, 2007, 19(4): 57 -63 .
[4] ZHU Xiaoyan, LI Aiqin, DUAN Xiaochen, TIAN Suiliang, LIU Meirong. Fine stratigraphic classification and correlation of Chang 3 reservoir of Yanchang Formation in Zhenbei Oilfield[J]. Lithologic Reservoirs, 2007, 19(4): 82 -86 .
[5] FANG Chaohe, WANG Yifeng, ZHENG Dewen, GE Zhixin. Maceral and petrology of Lower Tertiary source rock in Qintong Sag, Subei Basin[J]. Lithologic Reservoirs, 2007, 19(4): 87 -90 .
[6] HAN Chunyuan,ZHAO Xianzheng,JIN Fengming,WANG Quan,LI Xianping,WANG Suqing. “Multi-factor controlling, four-factor entrapping and key-factor enrichment”of stratigraphic-lithologic reservoirs and exploration practice in Erlian Basin (Ⅳ)———Exploration practice[J]. Lithologic Reservoirs, 2008, 20(1): 15 -20 .
[7] DAI Chaocheng, ZHENG Rongcai, WEN Huaguo, ZHANG Xiaobing. Sequence-based lithofacies and paleogeography mapping of Paleogene in Lvda area, Liaodongwan Basin[J]. Lithologic Reservoirs, 2008, 20(1): 39 -46 .
[8] YIN Yanshu, ZHANG Shangfeng, YIN Taiju. High resolution sequence stratigraphy framework and the distribution of sandbodies in salt lake of Qianjiang Formation in Zhongshi Oilfield[J]. Lithologic Reservoirs, 2008, 20(1): 53 -58 .
[9] SHI Xuefeng, DU Haifeng. Study on the sedimentary facies of the member 3 and 4+5 of Yanchang Formation in Jiyuan area[J]. Lithologic Reservoirs, 2008, 20(1): 59 -63 .
[10] YAN Shibang, HUWangshui, LI Ruisheng, GUAN Jian, LI Tao, NIE Xiaohong. Structural features of contemporaneous thrust faults in Hongche fault belt of Junggar Basin[J]. Lithologic Reservoirs, 2008, 20(1): 64 -68 .
TRENDMD:

Copyright © 2018 Lithologic Reservoirs

Support by Beijing Magtech support@magtech.com.cn