玛南斜坡侏罗系三工河组二段砂质碎屑流沉积特征及成藏条件

Sedimentary characteristics and hydrocarbon accumulation conditions of the sandstone debris flow in the second member of Jurassic Sangonghe Formation on southern slope of Mahu Depression

摘要

玛湖凹陷南斜坡（玛南斜坡）侏罗系三工河组二段发育砂质碎屑流沉积。根据储层物性和地震资料，采用岩心观察和薄片鉴定方法，分析玛南斜坡侏罗系三工河组二段砂质碎屑流沉积特征和成藏条件。结果表明：玛南斜坡三工河组二段砂质碎屑流砂体具有突变接触、漂浮泥砾和泥质撕裂屑等主要识别标志；粒度概率累积曲线大多呈宽缓上拱的 ＂两段式＂形态，以跳跃组分为主；地震剖面上具有先强波谷、后强波峰的双相强反射结构，横向上表现为短轴、不连续的舌状分布特征。玛南斜坡三工河组二段存在两级坡折带，当物源充分或水动力条件较强时，坡折带之上的三角洲前缘砂体滑塌至半深湖亚相，形成砂质碎屑流沉积。玛南斜坡三工河组二段砂质碎屑流砂体具有烃源岩条件高效、储盖组合良好、输导体系立体和侧向封挡优越等成藏条件。该结果为研究区下一步油气勘探提供指导。

Abstract

Sandy debris flow deposits are developed in the second member of Jurassic Sangonghe Formation in the southern slope of Mahu Depression. Based on reservoir physical properties and seismic data, core observation and thin section identification methods were adopted, analysis of its sedimentary characteristics and hydrocarbon accumulation conditions. The results indicate that: the results indicate that: the sandy debris flow sand body in the second member of Sangonghe Formation on southern slope of Mahu Depression have main sedimentary indicators include abrupt contact, floating mud, gravel and mud tearing debris. The grain size probability curves mostly present a gentle upward-arched "two-segment" shape, with the jump components being dominant. On the seismic profile, they have a doublephase strong reflection structure composed of a strong trough first and then a strong peak, and horizontally, it shows the characteristics of short-axis and discontinuous tongue-shaped distribution. There are two slope break zones in the second member of Sangonghe Formation in the study area. When mechanisms such as abundant sediment supply or strong hydrodynamic conditions are triggered, the delta front sand bodies above the slope break zones collapse into the semi-deep lake subfacies to form sandy debris flow deposits. The sandy debris flow sand body in the second member of Sangonghe Formation on southern slope of Mahu Depression has the characteristics of efficient source rock conditions, good reservoir cap combination, three-dimensional transport system and superior lateral blocking for reservoir formation, this result has guiding significance for the next step of oil and gas exploration in the research area.

关键词

玛南斜坡 / 侏罗系 / 三工河组 / 砂质碎屑流 / 沉积特征 / 成藏条件

Key words

southern slope of Mahu Depression / Jurassic / Sangonghe Formation / sandy debris flow / sedimentary characteristics / hydrocarbon accumulation conditions

参考文献

[1] SHANMUGAM G, MOIOLA R J. Reinterpretation of depositional processes in a classic flysch sequence(Pennsylvanian Jackfork Group), Quachita Mountains,Arkansas and Oklahoma[J]. AAPG Bulletin, 1995, 79(5):672-695.

[2] 邹才能, 赵政璋, 杨华, 等. 陆相湖盆深水砂质碎屑流成因机制与分布特征:以鄂尔多斯盆地为例[J]. 沉积学报, 2009, 27(6): 1065-1075.

[3] ZOU Caineng, ZHAO Zhengzhang, YANG Hua, et al. Genetic mechanism and distribution of sandy debris flows in terrestrial lacustrine basin[J]. Acta Sedimentologica Sinica, 2009, 27(6):1065-1075.

[4] 李相博, 付金华, 陈启林, 等. 砂质碎屑流概念及其在鄂尔多斯盆地延长组深水沉积研究中的应用[J]. 地球科学进展, 2011, 26(3): 286-294.

[5] LI Xiangbo, FU Jinhua, CHEN Qilin, et al. The concept of sandy debris flow and its application in the Yanchang Formation deep water sedimentation of the Ordos Basin[J]. Advances in Earth Science, 2011, 26(3):286-294.

[6] 王翔, 高吉宏, 庞玉东, 等. 鄂尔多斯盆地 M34 区块侏罗系延10段砂质辨状河储层特征及控制因素[J]. 东北石油大学学报, 2024, 48 (3):23-39.

[7] WANG Xiang, GAO Jihong, PANG Yudong, et al. Reservoir characteristics and controlling factors of Jurassic Yan 10 Member sandy braided river of M34 Block,Ordos Basin[J]. Journal of Northeast Petroleum University, 2024, 48(3):23-39.

[8] 蒲宇新, 李伟, 罗顺社, 等. 鄂尔多斯盆地陇东地区长 7 油层组深水水道型重力流沉积特征及沉积模式[J]. 东北石油大学学报, 2023, 47(4):70-81.

[9] PU Yuxin, LI Wei, LUO Shunshe, et al. Sedimentary characteristics and sedimentary model of deepwater channel-induced gravity flow of Chang 7 oil layer group in Longdong Area of the Ordos Basin[J]. Journal of Northeast Petroleum University, 2023, 47(4):70-81.

[10] 李楠, 李国辉, 吴长江, 等. 坡折带控制下的砂质碎屑流对油气勘探的意义:以四川盆地上三叠统须家河组为例[J]. 四川地质学报, 2014, 34(4):505-509.

[11] LI Nan, LI Guohui, WU Changjiang, et al. The application of sandy debris flow under the control of slope break to oil-gas exploration[J]. Acta Geologica Sichuan, 2014, 34(4):505-509.

[12] 夏景生, 刘晓涵, 王政军, 等. 渤海湾盆地南堡凹陷西部东营组三段一沙河街组一段砂质碎屑流沉积特征及油气勘探意义[J]. 石油学报, 2017, 38(4):399-413.

[13] XIA Jingsheng, LIU Xiaohan, WANG Zhengjun, et al. Sedimentary characteristics of sandy debris flow in the 3rd member of Dongying Formation and the 1st member of Shahejie Formation of the Western Nanbu Sag,Bohai Bay Basin and its significancein hydrocarbon exploration[J]. Acta Petrolei Sinica, 2017, 38(4):399-413.

[14] 张磊岗, 屈红军, 陈硕, 等. 浅海砂质碎屑流沉积特征与模式:以莺歌海盆地东方 1-1 气田莺二段为例[J]. 地质科技通报, 2021, 40(6): 140-150.

[15] ZHANG Leigang, QU Hongjun, CHEN Shuo, et al. Sedimentary characteristics and model of shallow sea sandy debris flow:a case study of Ying II Member in the Dongfang 1-1 Gas Field,Yinggehai Basin[J]. Bulletin of Geological Science and Technology, 2021, 40 (6):140-150.

[16] 包汉勇, 郭丽彬, 葛涛元, 等. 江汉盆地潜江凹陷北部潜江组盐湖重力流沉积特征与模式[J]. 现代地质, 2024, 38(5):1291-1305.

[17] BAO Hanyong, GUO Libin, GE Taoyuan, et al. Characteristics and modeling of saline lake gravity flow deposition in the Qianjiang Formation,Northern Qianjiang Depression,Jianghan Basin[J]. Geoscience, 2024, 38(5):1291-1305.

[18] 肖子洋, 黄传炎, 谢通, 等. 砂质碎屑流典型特征及识别标志[J]. 特种油气藏, 2016, 23(2):45-49.

[19] XIAO Ziyang, HUANG Chuanyan, XIE Tong, et al. Typical characteristics and identification marks of sandy debris flow[J]. Special Oil & Gas Reservoirs, 2016, 23(2):45-49.

[20] 李聪, 鲜本忠, 王鹏宇, 等. 南堡凹陷东北部东二段重力流砂岩储层发育规律[J]. 地质科技通报, 2023, 42(2):159-169.

[21] LI Cong, XIAN Benzhong, WANG Pengyu, et al. Development law of gravity flow sandstone reservoir in the second member of the Dongying Formation in the Northeastern Nanpu Depression[J]. Bulletin of Goloegical Sience and Tchnolocegy, 2023, 42(2): 159-169.

[22] 符勇, 李忠诚, 万谱, 等. 三角洲前缘滑塌型重力流沉积特征及控制因素:以松辽盆地大安地区青一段为例[J]. 岩性油气藏, 2021, 33 (1):198-208.

[23] FU Yong, LI Zhongcheng, WAN Pu, et al. Sedimentary characteristics and controlling factors of slump gravity flow in delta front: a case study of Qing 1 Member in Dáan Area,Songliao Basin[J]. Lithologic Rservoirse, 2021, 33(1):198-208.

[24] 吕奇奇, 辛红刚, 王林, 等. 鄂尔多斯盆地宁县地区三叠系延长组 7 段湖盆细粒重力流沉积类型、特征及模式[J]. 古地理学报, 2023, 25(4):823-840.

[25] LYU Qiqi, XIN Honggang, WANG Lin, et al. Sedimentary types,characteristics and model of lacustrine fine-grained gravity flow in the member 7 of Trassic Yanchang Formation in Ningxian Area,Ordos Basin[J]. Journal of Palaeogeography, 2023, 25(4):823-840.

[26] 厚刚福, 徐洋, 孙靖, 等. 三角洲前缘一湖盆深水区沉积模式及意义:以准噶尔盆地盆1井西凹陷三工河组二段一砂组为例[J]. 石油学报, 2019, 40(10):1223-1232.

[27] HOU Gangfu, XU Yang, SUN Jing, et al. Sedimentary model from delta front to deep water area and its significance:a case study of the first sand group of member 2 of Sangonghe Formation in the well Pen-1 west sag,Junggar Basin[J]. Acta Petrolei Sinica, 2019, 40(10):1223-1232.

[28] 厚刚福, 曾德龙, 牛志杰, 等. 准噶尔盆地砂质碎屑流砂体新发现及其油气勘探意义[J]. 天然气工业, 2020, 40(11):41-49.

[29] HOU Gangfu, ZENG Delong, NIU Zhijie, et al. New discovery of sandy debris flow sandbody and its implications for oil and gas exploration in the Junggar Basin[J]. Natural Gas Industry, 2020, 40(11):41-49.

[30] 孙靖, 薛晶晶, 厚刚福, 等. 湖盆凹陷区砂质碎屑流沉积特征与模式:以准噶尔盆地盆 1 井西凹陷侏罗系三工河组为例[J]. 中国矿业大学学报, 2019, 48(4):858-869.

[31] SUN Jing, XUE Jingjing, HOU Gangfu, et al. Sedimentary characteristics and model of sandy debris flow in depression area of lacustrine basin:a case study of the Jurassic Sangonghe Formation in the western well Pen-1 sag,Junggar Basin[J]. Journal of China University of Mining & Technology, 2019, 48(4):858-869.

[32] 孙靖, 薛晶晶, 费李莹, 等. 粗粒浅水三角洲沉积特征及模式:以准噶尔盆地莫北地区侏罗系三工河组为例[J]. 东北石油大学学报, 2022, 46(2):13-22.

[33] SUN Jing, XUE Jingjing, FEI Liying, et al. Sedimentary characteristics and model of coarse-grained shallow-water delta:a case study of Jurassic Sangonghe Formation in Mobei Area,Junggar Basin[J]. Journal of Northeast Petroleum University, 2022, 46(2): 13-22.

[34] 费李莹, 王仕莉, 吴涛, 等. 坡折带对砂质碎屑流沉积的控制作用:以准噶尔盆地盆 1 井西凹陷及周缘侏罗系三工河组为例[J]. 油气地质与采收率, 2020, 27(2):26-34.

[35] FEI Liying, WANG Shili, WU Tao, et al. Control of slope break zone on sandy debris flow deposition:a case study of Jurassic Sangonghe Formation in west sag of well Pen-1 and its periphery in Junggar Basin[J]. Petroleum Geology and Recovery Efficiency, 2020, 27(2):26-34.

[36] 雷海艳, 王剑, 陈锐兵, 等. 准噶尔盆地盆 1 井西凹陷东斜坡下侏罗统三工河组二段油气成藏有利地质因素[J]. 吉林大学学报(地球科学版), 2022, 52(4):1052-1064.

[37] LEI Haiyan, WANG Jian, CHEN Ruibing, et al. Favorable geological factors for hydrocarbon accumulation in the second member of Sangonghe Formation of Low Jurassic in the east slop of western well Pen-1 sag in Junggar Basin[J]. Journal of Jilin University (Earth Science Edtion), 2022, 52(4):1052-1064.

[38] 唐勇, 郭文建, 王霞田, 等. 玛湖凹陷砾岩大油区勘探新突破及启示[J]. 新疆石油地质, 2019, 40(2):127-137.

[39] TANG Yong, GUO Wenjian, WANG Xiatian, et al. A new breakthrough in exploration of large conglomerate oil province in Mahu Sag and its implications[J]. Xinjiang Petroleum Geology, 2019, 40(2):127-137.

[40] 支东明, 唐勇, 郑孟林, 等. 玛湖凹陷源上砾岩大油区形成分布与勘探实践[J]. 新疆石油地质, 2018, 39(1):1-9.

[41] ZHI Dongming, TANG Yong, ZHENG Menglin, et al.Discovery, distribution and exploration practice of large oil provinces of above-source conglomerate in Mahu Sag[J]. Xinjiang Petroleum Geology, 2018, 39(1):1-9.

[42] 雷德文, 陈刚强, 刘海磊, 等. 准噶尔盆地玛湖凹陷大油(气)区形成条件与勘探方向研究[J]. 地质学报, 2017, 91(7):1604-1619.

[43] LEI Dewen, CHEN Gangqiang, LIU Hailei, et al. Study on the forming conditions and exploration fields of the Mahu giant oil(gas) province,Junggar Basin[J]. Acta Geologica Sinice, 2017, 91(7):1604-1619.

[44] 王然, 郑孟林, 杨森, 等. 玛南斜坡区上乌尔禾组弱胶结砂砾岩储层特征及控制因素[J]. 特种油气藏, 2022, 29(1):23-30.

[45] WANG Ran, ZHENG Menglin, YANG Sen, et al. Characteristics and controlling factors of weakly cemented glutenite reservoir in Permian Upper Urho Formation,south slope of Mahu Sag[J]. Special Oil & Gas Reservoirs, 2022, 29(1):23-30.

[46] 王辉, 侯文锋, 李婷, 等. 前陆盆地坡折带对沉积相的控制作用:以准噶尔盆地西北缘玛湖凹陷三工河组为例[J]. 中南大学学报(自然科学版), 2022, 53(3):1136-1145.

[47] WANG Hui, HOU Wenfeng, LI Ting, et al. Control of slope break on sedimentary facies in foreland basin:a case study of Sangonghe Formation in northwestern margin of Junggar Basin[J]. Journal of Central South University(Science and Technology), 2022, 53 (3):1136-1145.

[48] 王辉, 武鑫, 李婷, 等. 准噶尔盆地西北缘侏罗系三工河组沉积特征[J]. 新疆地质, 2020, 38(1):66-70.

[49] WANG Hui, WU Xin, LI Ting, et al. Sedimentary characteristics Sangonghe Formation of Jurassic in northwest margin of Junggar Basin[J]. Xinjiang Geology, 2020, 38(1):66-70.

[50] 邱争科, 吴让彬, 李武, 等. 玛湖凹陷西北缘侏罗系三工河组油藏特征[J]. 新疆地质, 2020, 38(3):378-382.

[51] QIU Zhengke, WU Rangbin, LI Wu, et al. Reservoir characteristics of Jurassic Sangonghe Formation in northwest margin of Mahu Depression[J]. Xinjiang Geology, 2020, 38(3):378-382.

[52] 李晓慧, 姜振学, 黄立良, 等. 玛湖凹陷风城组页岩油富集主控因素及有利富集层段[J]. 东北石油大学学报, 2022, 46(2):33-44.

[53] LI Xiaohui, JIANG Zhenxue, HUANG Liliang, et al. Main controlling factors of shale oil enrichment and optimization of Fengcheng Formation in Mahu Sag[J]. Journal of Northeast Petroleum University, 2022, 46(2):33-44.

[54] 王小军, 王婷婷, 曹剑. 玛湖凹陷风城组碱湖烃源岩基本特征及其高效生烃[J]. 新疆石油地质, 2018, 39(1):9-15.

[55] WANG Xiaojun, WANG Tingting, CAO Jian. Basic characteristics and highly efficient hydrocarbon generation of alkaline-lacustrine source rocks in Fengcheng Formation of Mahu Sag[J]. Xinjiang Petroleum Geology, 2018, 39(1):9-15.

[56] 支东明, 曹剑, 向宝力, 等. 玛湖凹陷风城组碱湖烃源岩生烃机理及资源量新认识[J]. 新疆石油地质, 2016, 37(5):499-506.

[57] ZHI Dongming, CAO Jian, XIANG Baoli, et al. Fengcheng alkaline lacustrine source rocks of Lower Permian in Mahu Sag in Junggar Basin:hydrocarbon generation mechanism and petroleum resources restimation[J]. Xinjiang Petroleum Geology, 2016, 37(5): 499-506.

[58] 何晋译, 冷筠滢, 李志明, 等. 不同岩相泥页岩生烃能力与含油性特征:以玛湖凹陷风城组玛页 1 井为例[J]. 东北石油大学学报, 2025, 49(1):1-17.

[59] HE Jinyi, LENG Junying, LI Zhiming, et al. Hydrocarbon generation capacity and oil-bearing properties of shale with different lithofacies:a case study of well Mayel in Fengcheng Formation,Mahu Sag[J]. Journal of Northeast Petroleum University, 2025, 49(1): 1-17.

[60] voir in Yongchuan, Southeastern Sichuan Basin[J]. Earth Science Frontiers, 2024, 31(3):298-311.

[61] 高键, 李慧莉, 何治亮, 等. 渝东彭水地区常压页岩气压力演化与富集保存[J]. 天然气工业, 2022, 42(8):124-135.

[62] GAO Jian, LI Huili, HE Zhiliang, et al. Pressure evolution and preservation of normal-pressure shale gas in the Pengshui Area, Eastern Chongqing[J]. Natural Gas Industry, 2022, 42(8):124-135.

[63] 刘瑞崟. 四川盆地威远地区筇竹寺组页岩气储层特征及富集规律[D]. 成都: 成都理工大学,2023:1-170.

[64] LIU Ruiyin. Reservoir characteristics and enrichment patterns of Qiongzhusi Formation shale gas in the Weiyuan Area,Sichuan Basin[D] .Chengdu: Chengdu University of Technology,2023:1-170.

[65] 郭旭升, 胡东风, 俞凌杰, 等. 页岩自封闭性与页岩气保存的微观机理研究[J]. 石油实验地质, 2023, 45(5):821-831.

[66] GUO Xusheng, HU Dongfeng, YU Linjie, et al. Microscopic mechanisms of shale self-sealing and gas preservation[J]. Petroleum Geology & Experiment, 2023, 45(5):821-831.

[67] 张昆. 复杂构造背景海相页岩气保存机理与评价方法[D]. 北京: 中国石油大学(北京),2019:1-123.

[68] ZHANG Kun. Preservation mechanism and evaluation methods of marine shale gas under complex structural settings[D]. Beijing: China University of Petroleum(Beijing),2019:1-123.

[69] 杨景辉. 扬子区下寒武统筇竹寺组海相页岩有机质微石墨化过程对孔隙的控制机制[D]. 北京: 中国矿业大学,2024:1-108.

[70] YANG Jinghui. The control mechanism of the organic Matter micrographitization process on pores in marine shale of the Lower Cambrian Qiongzhusi Formation in the Yangtze Area[D]. Beijing: China University of Mining & Technology,2024:1-108.

[71] 闵华军. 扬子板块西南缘下寒武统筇竹寺组高过成熟页岩储层特征及形成机理[D]. 成都: 成都理工大学,2020:1-211.

[72] MIN Huajun. Characteristics and formation mechanism of highly over-mature shale gas reservoirs in Lower Cambrian Qiongzhusi Formation in the Southwestern Yangtze plate[D]. Chengdu: Chengdu University of Technology,2020:1-211.

[73] 王玉满, 董大忠, 程相志, 等. 海相页岩有机质碳化的电性证据及其地质意义:以四川盆地南部地区下寒武统箶竹寺组页岩为例[J]. 天然气工业, 2014, 34(8):1-7.

[74] WANG Yuman, DONG Dazhong, CHENG Xiangzhi, et al. Electric property evidences of the carbonification of organic matters inmarine shales and its geologic significance:a case of the Lower Cambrian Qiongzhusi shale in Southern Sichuan Basin[J]. Natural Gas Industry, 2014, 34(8):1-7.

基金资助

中国石油天然气集团有限公司重大专项(2023ZZ24YJ02)