Lithologic Reservoirs ›› 2025, Vol. 37 ›› Issue (3): 1-12.doi: 10.12108/yxyqc.20250301

• PETROLEUM EXPLORATION • Previous Articles    

Hydrocarbon continuous accumulation conditions of Cretaceous Jiufotang Formation in Ludong Sag，Kailu Basin

HU Changhao1,2, PEI Jiaxue1, CAI Guogang1   

  1. 1. Research Institute of Exploration and Development, PetroChina Liaohe Oilfield Company, Panjin 124010, Liaoning, China;
    2. School of Geosciences and Info-physics, Central South University, Changsha 410083, China
  • Received:2024-11-14 Revised:2025-01-01 Published:2025-05-10

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Abstract: Based on the theory of continuous accumulation and the data of seismic，drilling ，master logging， well logging and core testing，the hydrocarbon accumulation conditions of Jiufotang Formation in Ludong Sag of Kailu Basin were studied from multiple aspects，including the tectonic sedimentary evolution background and its controlled source rocks，reservoirs，and reservoir characteristics of the Jiufotang Formation. The continuous accumulation patterns and favorable exploration targets in this area were clarified. The results show that：（1）Ludong Sag presents a single-fault half-graben configuration，where the steep slope zone serves as the main source supply area of the original sedimentary source，while the gentle slope zone is the main uplift and denudation area in the late stage，the main part of the original sedimentary subsidence center exists in current structure. The sedimentation of Jiufotang Formation is controlled by the staged activities of the sag-controlling fault. In the sedimentary stage with low sedimentation rate and relatively shallow water conditions，large fan deltas are developed in the steep slope zone，and the sand bodies are in the state of“pervasive sand distribution”.（2）Two source rock intervals are identified in Jiufotang Formation in the research area：tuffaceous mudstones in lower member of Jiufotang Formation and oil shales（Oil Groups Ⅰ-Ⅲ）in upper member of Jiufotang Formation，both of them are good source rocks with low maturity to maturity. The principal source rocks are the oil shales（Oil Groups Ⅰ- Ⅲ），with the chloroform bitumen‘A’of 0.48%，TOC of 4.47%，total hydrocarbon of 2 377 mg/L，organic matter type mainly consisting of type Ⅰ and Ⅱ1，and vitrinite reflectance of 0.64%. A small amount of conventional sandstone reservoirs are developed in the underwater distributary channel of the fan delta front. The tight sandstone reservoirs are widely and continuously distributed，and the lacustrine carbonate reservoirs are developed in the center of the subsag. Influenced by the effects of provenance supply and water environment，the storage space of different types of reservoirs develop sequentially. Intergranular（dissolved）pores in coarse sandstones， intragranular dissolved pores in fine sandstones，matrix dissolution pores in dolomitic mudstones，and carbonate dissolution pores are widely developed. Thick dark mudstone developed in Shahai Formation can be used as regional cap rock（. 3）The source-reservoir in the subsag area is integrated，and with superior preservation conditions. Different types of reservoirs are continuously developed. Conventional oil-tight oil-shale reservoirs are successively developed on the plane，and multiple types are superimposed vertically. Houhe and Jiaolige fan bodies have shown promising exploration results，while Kuluntala and Qinghe fan bodies are favorable areas for exploration.

Key words: sag-controlling fault, sedimentation rate, fan delta, lacustrine carbonate reservoirs, unconventional hydrocarbons, Jiufotang Formation, Cretaceous, Ludong Sag, Kailu Basin

CLC Number: 

  • TE122.1
[1] U.S. Geological Survey National Oil and Gas Resource Assessment Team. 1995 national assessment of United States oil and gas resources[R]. Washington:United States Government Printing Office,1995:20.
[2] GAUTIER D L,DOLTON G L,TAKAHASHI K I,et al. 1995 national assessment of United States oil and gas resources:Results, methodology,and supporting data[R]. Reston:U.S. Geological Survey,1995.
[3] SCHMOKER J W. Method for assessing continuous-type(unconventional)hydrocarbon accumulations[R]?GAUTIER D L,DOLTON G L,TAKAHASHI K I,et al. 1995 national assessment of United States oil and gas resources:results,methodology,and supporting data. Reston:U.S. Geological Survey, 1995.
[4] SCHMOKER J W. A resource evaluation of the Bakken Formation(Upper Devonian and Lower Mississippian)continuous oil accumulation,Williston Basin,North Dakota and Montana[J]. The Mountain Geologist,1996,33(1):1-10.
[5] SCHMOKER J W,FOUCH T D,CHARPENTIER R R. Gas in the Uinta Basin,Utah-resources in continuous accumulations[J]. The Mountain Geologist,1996,33(4):95-104.
[6] SCHMOKER J W. U.S. geological survey assessment concepts for continuous petroleum accumulations[R]?U. S. Geological Survey Uinta-Piceance Assessment Team. Petroleum systems and geologic assessment of oil and gas in Uinta-Piceance Province,Utah and Colorado. Reston:U.S. Geological Survey,2003.
[7] 邹才能,陶士振,袁选俊,等."连续型"油气藏及其在全球的重要性:成藏、分布与评价[J]. 石油勘探与开发,2009,36(6):669-682. ZOU Caineng,TAO Shizhen,YUAN Xuanjun,et al. Global importance of "continuous" petroleum reservoirs:Accumulation, distribution and evaluation[J]. Petroleum Exploration and Development,2009,36(6):669-682.
[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] 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.
[10] 李晓光,刘兴周,李金鹏,等. 辽河坳陷大民屯凹陷沙四段湖相页岩油综合评价及勘探实践[J]. 中国石油勘探,2019,24(5):636-648. LI Xiaoguang,LIU Xingzhou,LI Jinpeng,et al. Comprehensive evaluation and exploration practice of Sha 4 lacustrine shale oil in Damintun Sag,Liaohe Depression[J]. China Petroleum Exploration,2019,24(5):636-648.
[11] 王乔,宋立新,韩亚杰,等. 辽河西部凹陷雷家地区古近系沙三段沉积体系及层序地层[J]. 岩性油气藏,2021,33(6):102-113. WANG Qiao,SONG Lixin,HAN Yajie,et al. Depositional system and sequence stratigraphy of the third member of Paleogene Shahejie Formation in Leijia area,Western Liaohe Depression[J]. Lithologic Reservoirs,2021,33(6):102-113.
[12] 赵会民,刘雪松,孟卫工,等. 曙光-雷家地区隐蔽油气藏及其成藏动力学特征[J]. 吉林大学学报(地球科学版),2011, 41(1):21-28. ZHAO Huimin,LIU Xuesong,MENG Weigong,et al. Formation and pool-forming dynamic properties of subtle reservoirs in Shuguang-Leijia area[J]. Journal of Jilin University:Earth Science Edition,2011,41(1):21-28.
[13] 殷敬红,雷安贵,方炳钟,等. 辽河外围中生代盆地"下洼找油气"理念[J]. 石油物探与开发,2008,35(1):6-10. YIN Jinghong,LEI Angui,FANG Bingzhong,et al. Concept of "seeking for oil and gas deep down depressions" in Liaohe peripheral Mesozoic basin[J]. Petroleum Exploration and Development,2008,35(1):6-10.
[14] 裴家学,方园. 陆西凹陷马北斜坡有效储层预测[J]. 石油天然气学报,2014,36(9):58-62. PEI Jiaxue,FANG Yuan. The prediction of effective reservoirs in Mabei Slope of Luxi Sag[J]. Journal of Oil and Gas Technology,2014,36(9):58-62.
[15] 裴家学. 宽方位地震资料在陆西凹陷勘探中的应用[J]. 大庆石油地质与开发,2015,34(5):146-150. PEI Jiaxue. Application of the wide azimuth seismic data in the exploration of Luxi Sag[J]. Petroleum Geology & Oilfield Development in Daqing,2015,34(5):146-150.
[16] 郭彦民,裴家学,赖鹏,等. 陆西凹陷特殊储层地震预测方法探讨[J]. 断块油气田,2016,23(4):451-454. GUO Yanmin,PEI Jiaxue,LAI Peng,et al. Seismic prediction of special reservoirs in Luxi Depression[J]. Fault-Block Oil & Gas Field,2016,23(4):451-454.
[17] 裴家学. 陆家堡凹陷火山活动与油气关系探讨[J]. 石油地质与工程,2015,29(2):1-4. PEI Jiaxue. Discussion on relationship between volcanic activity and hydrocarbon of Lujiapu Depression[J]. Petroleum Geo-logy & Engineering,2015,29(2):1-4.
[18] 张健,朱占平,孙雷,等. 松辽盆地外围西部上二叠统林西组岩相古地理特征[J]. 东北石油大学学报,2019,43(2):1-11. ZHANG Jian,ZHU Zhanping,SUN Lei,et al. Lithofacies paleogeography characteristics of Upper Permian Linxi Formation in the western periphery of Songliao Basin[J]. Journal of Northeast Petroleum University,2019,43(2):1-11.
[19] 苗安中,王晓奇,梁猛,等. 嫩江-八里罕断裂中段构造形迹及活动时代[J]. 东华理工大学学报(自然科学版),2019,42(3):209-219. MIAO Anzhong,WANG Xiaoqi,LIANG Meng,et al. Structural traces and active ages of the middle section of NenjiangBalihan Fault[J]. Journal of East China University of Technology(Natural Science),2019,42(3):209-219.
[20] 裴家学. 辽河外围盆地岩性油藏形成条件及识别[J]. 特种油气藏,2015,22(3):62-65. PEI Jiaxue. Forming conditions and identification of lithologic reservoirs in peripheral basin,Liaohe Oilfield[J]. Special Oil & Gas Reservoirs,2015,22(3):62-65.
[21] 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.
[22] 刘宗堡,李雪,郑荣华,等. 浅水三角洲前缘亚相储层沉积特征及沉积模式:以大庆长垣萨北油田北二区萨葡高油层为例[J]. 岩性油气藏,2022,34(1):1-13. LIU Zongbao,LI Xue,ZHENG Ronghua,et al. Sedimentary characteristics and models of shallow water delta front subfacies reservoirs:A case study of Sapugao oil layer in north-block of Sabei oilfield,Daqing placanticline[J]. Lithologic Reservoirs, 2022,34(1):1-13.
[23] 李威,李友川. 渤海海域渤中19-6构造带油气纵向连续分布形成机理研究[J]. 中国海上油气,2022,34(1):74-83. LI Wei,LI Youchuan. Study on formation mechanism of oil and gas longitudinal continuous distributionin of BZ19-6 structural belt,Bohai sea[J]. China Offshore Oil and Gas,2022,34(1):74-83.
[24] 付广,王宇鹏. 断裂密集带及附近下生上储式油气富集的控制因素[J]. 岩性油气藏,2018,30(2):23-29. FU Guang,WANG Yupeng. Controlling factors of hydrocarbon enrichment with the type of "below source and upper reservoir" in fault concentrated zones and nearby[J]. Lithologic Reservoirs,2018,30(2):23-29.
[25] 程浩,金振奎,余文端,等. 苏北盆地溱潼凹陷阜三段浅水三角洲沉积古地貌、古环境恢复[J]. 油气藏评价与开发,2023, 13(3):368-378. CHENG Hao,JIN Zhenkui,YU Wenduan,et al. Sedimentary palaeogeomorphology and palaeo-environment reconstruction of shallow water delta in the 3rd member of Funing Formation in Qintong Sag,Subei Basin[J]. Petroleum Reservoir Evaluation and Development,2023,13(3):368-378.
[26] 马正武,官大勇,王启明,等. 辽中凹陷古近系东三段湖底扇沉积特征及控制因素[J]. 岩性油气藏,2022,34(2):131-140. MA Zhengwu,GUAN Dayong,WANG Qiming,et al. Sedimentary characteristics and controlling factors of sublacustrine fans of the third member of Paleogene Dongying Formation in Liaozhong Sag[J]. Lithologic Reservoirs,2022,34(2):131-140.
[27] 张兴洲,郭冶,曾振,等. 东北地区中-新生代盆地群形成演化的动力学背景[J]. 地学前缘,2015,22(3):88-98. ZHANG Xingzhou,GUO Ye,ZENG Zhen,et al. Dynamic evolution of the Mesozoic-Cenozoic basins in the northeastern China[J]. Earth Science Frontiers,2015,22(3):88-98.
[28] 刘化清,刘宗堡,吴孔友,等. 岩性地层油气藏区带及圈闭评价技术研究新进展[J]. 岩性油气藏,2021,33(1):25-36. LIU Huaqing,LIU Zongbao,WU Kongyou,et al. New progress in study of play and trap evaluation technology for lithostratigraphic reservoirs[J]. Lithologic Reservoirs,2021,33(1):25-36.
[29] 张磊,李莎,罗波波,等. 东濮凹陷北部古近系沙三段超压岩性油气藏成藏机理[J]. 岩性油气藏,2024,36(4):57-70. ZHANG Lei,LI Sha,LUO Bobo,et al. Accumulation mechanism of overpressured lithologic reservoirs of the third member of Paleogene Shahejie Formation in northern Dongpu Sag[J]. Lithologic Reservoirs,2024,36(4):57-70.
[30] 李晓光,刘兴周. 辽河断陷连续型油气聚集特征及聚集模式研究[J]. 特种油气藏,2020,27(1):1-8. LI Xiaoguang,LIU Xingzhou. Continuous hydrocarbon accumulation properties and patterns in Liaohe Fault-Depression[J]. Special Oil & Gas Reservoirs,2020,27(1):1-8.
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