Multiscale description and controlling factors analyses of fluvial tight reservoir: a case study on the 8th Member of Lower Shihezi Formation in Sulige gas field, Ordos Basin
BI Mingwei1, SUN Jiaopeng2, CHEN Shiyue3, ZHOU Zhaohua4, ZHANG Manlang4, QIAN Aihua4
1 School of City and Architecture Engineering,Zaozhuang University,Shandong Zaozhuang 277160,China; 2 Department of Geology,Northwest University,Xi'an 710069,China; 3 School of Geosciences,China University of Petroleum,Shandong Qingdao 266580,China; 4 PetroChina Research Institute of Petroleum Exploration & Development,Beijing 100083,China
Abstract In this study,we carries out a comprehensive work of outcrop section observation,microscopic petrology investigation and quantitatively analysis of microscopic pore structure to reveal the fluvial reservoir characteristics of the 8th Member of the Lower Shihezi Formation of Su6 Area,Sulige Gas Field. Sand body structure characteristics,sandstone types,pore types,microscopic pore structure characteristics are detailed analyzed to indicate the controlling factors of effective fluvial tight sand reservoir. Our work demonstrates that the sand body of channel bar and point bar are the flooding event deposition and are medium-coarse grained lithic quartzarenite and litharenite. On the contrary,the channel fill microfacies sand body is the normal river flow period deposition,the associated sandstone is characterized by fine grained(feldspathic)litharenite and lower structure maturity. The medium-coarse grained sandstones have a large proportion of dissolved and interconnected pores with larger radius effective pore-throat. The pore types of fine-grained sandstones are mainly clay minerals intercrystalline pores,and the pore-throat radius is much smaller. Densification modes of fluvial reservoir can be divided into three types,such as densification of medium-coarse grained lithic quartzarenite by strong siliceous cementation and medium to strong compaction,densification of medium-coarse grained litharenite by strong compaction,densification of fine grained(feldspathic)litharenite by strong compaction and medium to strong siliceous cementation. The two types of medium-coarse grained sandstones are densification after hydrocarbon charge,which experience injection of organic acid and make dissolved pore to be the major storage space. Fine grained(feldspathic)litharenite is densification before hydrocarbon charge,which experiences weak dissolution. Differences of densification modes result in variable pore structure characteristics and reservoir physical properties.
Fund:Co-funded by the National Natural Science Foundation of China(No.41702112)and the funding by Qingchuang Science and Technology Plan of Shandong Universities(No.2021KJ063)
Corresponding Authors:
CHEN Shiyue,born in 1963,is a professor and Ph.D. supervisor. He is mainly engaged in research on sedimentology. E-mail: chenshiyue@vip.sina.com.
About author: BI Mingwei,born in 1986,is a lecturer. He is engaged in researches on sedimentology and reservoir geology. E-mail: bimingwei282@sina.com.
Cite this article:
BI Mingwei,SUN Jiaopeng,CHEN Shiyue et al. Multiscale description and controlling factors analyses of fluvial tight reservoir: a case study on the 8th Member of Lower Shihezi Formation in Sulige gas field, Ordos Basin[J]. JOPC, 2023, 25(3): 684-700.
BI Mingwei,SUN Jiaopeng,CHEN Shiyue et al. Multiscale description and controlling factors analyses of fluvial tight reservoir: a case study on the 8th Member of Lower Shihezi Formation in Sulige gas field, Ordos Basin[J]. JOPC, 2023, 25(3): 684-700.
[1] 毕明威,陈世悦,周兆华,刘金,郑国强,张满郎. 2015a. 苏里格气田苏6区块盒8段致密砂岩储集层次生孔隙成因探讨. 中国石油大学学报(自然科学版), 39(1): 8-16. [Bi M W,Chen S Y,Zhou Z H,Liu J,Zheng G Q,Zhang M L. 2015a. Genesis of secondary pores of tight sandstone reservoir in He 8th Member in Su 6 area of Sulige gas field. Journal of China University of Petroleum(Edition of Natural Science), 39(1): 8-16] [2] 毕明威,陈世悦,周兆华,郑国强,张满郎,高立祥,钱爱华,谷江锐,石石,刘金. 2015b. 鄂尔多斯盆地苏里格气田苏6区块二叠系下石盒子组8段砂岩储层致密成因模式. 地质论评, 61(3): 599-613. [Bi M W,Chen S Y,Zhou Z H,Zheng G Q,Zhang M L,Gao L X,Qian A H,Gu J R,Shi S,Liu J. 2015b. Densification modes of sandstone reservoir in the 8th Member of the Lower Shihezi Formation,Permian,in Su 6 area of Sulige Gas Field,Ordos Basin. Geological Review, 61(3): 599-613] [3] 毕明威,陈世悦,周兆华,商琳,郑国强,张满郎,高立祥. 2015c. 鄂尔多斯盆地苏里格气田苏6区块盒8段致密砂岩储集层微观孔隙结构特征及其意义. 天然气地球科学, 26(10): 1851-1861. [Bi M W,Chen S Y,Zhou Z H,Shang L,Zheng G Q,Zhang M L,Gao L X. 2015. Characteristics and significance of microscopic pore structure in tight sandstone reservoir of the 8th Member of Lower Shihezi Formation in the Su 6 area of Sulige gasfield. Natural Gas Geoscience, 26(10): 1851-1861] [4] 葛云龙,逯径铁,廖保方,李列,张为民,闻兰,薛培华,郭睿. 1998. 辫状河相储集层地质模型: “泛连通体”. 石油勘探与开发, 25(5): 77-79. [Ge Y L,Lu J T,Liao B F,Li L,Zhang W M,Wen L,Xue P H,Guo R. 1998. A braided river reservoir geological model: ”pan-communicated sandbody”. Petroleum Exploration and Development, 25(5): 77-79] [5] 宫雪,胡新友,李文厚,沈武显. 2020. 成岩作用对储层致密化的影响差异及定量表述: 以苏里格气田苏77区块致密砂岩为例. 沉积学报, 38(6): 1338-1348. [Gong X,Hu X Y,Li W H,Shen W X. 2020. Different influences and quantitative description of effect of diagenesis on reservoir densification: Case study of tight sandstone in Su77 block,Sulige gas field. Acta Sedimentologica Sinica, 38(6): 1338-1348] [6] 何顺利,焦春艳,王建国,罗富平,邹林. 2011. 恒速压汞与常规压汞的异同. 断块油气田, 18(2): 235-237. [He S L,Jiao C Y,Wang J G,Luo F P,Zou L. 2011. Discussion on the differences between constant-speed mercury injection and conventional mercury injection techniques. Fault-Block Oil & Gas Field, 18(2): 235-237] [7] 侯明才,窦伟坦,陈洪德,董桂玉. 2009. 鄂尔多斯盆地苏里格气田北部盒8、山1段成岩作用及有利储集层分布. 矿物岩石, 29(4): 66-74. [Hou M C,Dou W T,Chen H D,Dong G Y. 2009. Study on diagenesis of the He 8 member and Shan 1 member in north of the Sulige gas field,Ordos basin. Journal of Mineralogy and Petrology, 29(4): 66-74] [8] 黄思静,武文慧,刘洁,沈立成,黄成刚. 2003. 大气水在碎屑岩次生孔隙形成中的作用: 以鄂尔多斯盆地三叠系延长组为例. 地球科学, 28(4): 419-424. [Huang S J,Wu W H,Liu J,Shen L C,Huang C G. 2003. Generation of secondary porosity by meteoric water during time of subaerial exposure: an example from Yanchang Formation sandstone of Triassic of Ordos Basin. Earth Science, 28(4): 419-424] [9] 黄思静,黄可可,冯文立,佟宏鹏,刘丽红,张雪花. 2009. 成岩过程中长石、高岭石、伊利石之间的物质交换与次生孔隙的形成: 来自鄂尔多斯盆地上古生界和川西凹陷三叠系须家河组的研究. 地球化学, 38(5): 498-506. [Huang S J,Huang K K,Feng W L,Tong H P,Liu L H,Zhang X H. 2009. Mass exchanges among feldspar,kaolinite and illite and their influences on secondary porosity formation in clastic diagenesis: a case study on the Upper Paleozoic,Ordos Basin and Xujiahe Formation,western Sichuan Depression. Geochimica, 38(5): 498-506] [10] 李文厚,刘溪,张倩,郭艳琴,李克永,袁珍,王妍,马瑶,白金莉,杨博,李兆雨. 2019. 鄂尔多斯盆地中晚三叠世延长期沉积演化. 西北大学学报(自然科学版), 49(4): 605-621. [Li W H,Liu X,Zhang Q,Guo Y Q,Li K Y,Yuan Z,Wang Y,Ma Y,Bai J L,Yang B,Li Z Y. 2019. Deposition evolution of Middle-Late Triassic Yanchang Formation in Ordos Basin. Journal of Northwest University(Natural Science Edition), 49(4): 605-621] [11] 李文厚,张倩,李克永,陈强,郭艳琴,马瑶,冯娟萍,张道锋. 2021. 鄂尔多斯盆地及周缘地区晚古生代沉积演化. 古地理学报, 23(1): 39-52. [Li W H,Zhang Q,Li K Y,Chen Q,Guo Y Q,Ma Y,Feng J P,Zhang D F. 2021. Sedimentary evolution of the late Paleozoic in Ordos Basin and its adjacent areas. Journal of Palaeogeography(Chinese Edition), 23(1): 39-52] [12] 廖保方,张为民,李列,逯径铁,葛云龙,闻兰,薛培华,郭睿. 1998. 辫状河现代沉积研究与相模式: 中国永定河剖析. 沉积学报, 16(1): 34-39. [Liao B F,Zhang W M,Li L,Lu J T,Ge Y L,Wen L,Xue P H,Guo R. 1998. Study on modern deposit of a braided stream and facies model: taking the Yongding River as an example. Acta Sedimentologica Sinica, 16(1): 34-39] [13] 邱隆伟,姜在兴,操应长,邱荣华,陈文学. 2001. 泌阳凹陷碱性成岩作用及其对储集层的影响. 中国科学(D辑), 31(9): 752-759. [Qiu L W,Jiang Z X,Cao Y C,Qiu R H,Chen W X. 2001. Alkaline diagenesis and influence on reservoir in Biyang Depression. Science in China(Series D), 31(9): 752-759] [14] 冉新权,李安琪. 2008. 苏里格气田开发论. 北京: 石油工业出版社. [Ran X Q,Li A Q. 2008. Development Theory of Sulige Gas Field. Beijing: Petroleum Industry Press] [15] 谭晨曦,李文厚,张慧元,冯娟萍,郑勇. 2011. 河流相致密砂岩储集层成岩作用及其对储集层的影响: 以大牛地气田下石盒子组砂岩储集层为例. 矿物学报, 31(2): 211-220. [Tan C X,Li W H,Zhang H Y,Feng J P,Zheng Y. 2011. Diagenesis and its influence on reservoir quality fluvial dense sandstone: a case study on the Xiashihezi Formation in Daniudi gas field,Ordos Basin,China. Acta Mineralogica Sinica, 31(2): 211-220] [16] 王为民,郭和坤,叶朝辉. 2001. 利用核磁共振可动流体评价低渗透油田开发潜力. 石油学报, 22(6): 40-44. [Wang W M,Guo H K,Ye Z H. 2001. The evaluation of development potential in low permeability oilfield by the aid of NMR movable fluid detecting technology. Acta Petrolei Sinica, 22(6): 40-44] [17] 王晓晨,罗静兰,李文厚,王若谷. 2018. 鄂尔多斯盆地苏77区块盒8下亚段致密砂岩储层低渗成因与优质储层形成机理. 地质科技情报, 37(2): 174-182. [Wang X C,Luo J L,Li W H,Wang R G. 2018. Genesis of low permeability and development mechanism of high-quality reservoirs in tight sandstone reservoir: a case study from the lower part of He 8 reservoir of Su 77 block in Ordos Basin. Geological Science and Technology Information, 37(2): 174-182] [18] 王秀平,牟传龙. 2013. 苏里格气田东二区盒8段储集层成岩作用与成岩相研究. 天然气地球科学, 24(4): 678-689. [Wang X P,Mou C L. 2013. Diagenesis and diagenetic facies of reservoir in He 8 section of Shihezi Formation in east Ⅱ part of Sulige gas field. Natural Gas Geoscience, 24(4): 678-689] [19] 文华国,郑荣才,高红灿,戴朝成,李国军. 2007. 苏里格气田苏6井区下石盒子组盒8段沉积相特征. 沉积学报, 25(1): 90-98. [Wen H G,Zheng R C,Gao H C,Dai C C,Li G J. 2007. Sedimentary Facies of the 8th member of lower Shihezi Formation in Su 6 area,Sulige gas field. Acta Sedimentologica Sinica, 25(1): 90-98] [20] 肖红平,刘锐娥,李文厚,张福东,张春林,郝爱胜,缪卫东. 2012. 鄂尔多斯盆地上古生界碎屑岩相对高渗储集层成因及分布. 古地理学报, 14(4): 543-552. [Xiao H P,Liu R E,Li W H,Zhang F D,Zhang C L,Hao A S,Miao W D. 2012. Origin and distribution of higher permeable reservoir of the Upper Paleozoic in Ordos Basin. Journal of Palaeogeography(Chinese Edition), 14(4): 543-552] [21] 肖奕,王汝成,陆现彩,高剑峰,徐士进. 2003. 低温碱性溶液中微纹长石溶解性质研究. 矿物学报, 23(4): 333-340. [Xiao Y,Wang R C,Lu X C,Gao J F,Xu S J. 2003. Experimental study on the low-temperature dissolution of microperthite in alkaline solution. Acta Mineralogica Sinica, 23(4): 333-340] [22] 张创,孙卫,杨建鹏,高辉,侯海林,齐瑞,罗江云,魏希望. 2012. 低渗砂岩储层孔喉的分布特征及其差异性成因. 地质学报, 86(2): 335-348. [Zhang C,Sun W,Yang J P,Gao H,Hou H L,Qi R,Luo J Y,Wei X W. 2012. Pore and pore-throat size distributions of low permeability sandstone reservoir and their differential origin. Acta Geologica Sinica, 86(2): 335-348] [23] 钟大康,朱筱敏,王红军. 2008. 中国深层优质碎屑岩储层特征与形成机理分析. 中国科学D辑: 地球科学,38(增刊Ⅰ): 11-18. [Zhong D K,Zhu X M,Wang H J. 2008. Characteristics and formation mechanism of high quality clastic reservoirs in China. Scientia Sinica Terrar,38(supplement Ⅰ): 11-18] [24] 邹才能,朱如凯,吴松涛,杨智,陶士振,袁选俊,侯连华,杨华,徐春春,李登华,白斌,王岚. 2012. 常规与非常规油气聚集类型、特征、机理及展望: 以中国致密油和致密气为例. 石油学报, 33(2): 173-187. [Zou C N,Zhu R K,Wu S T,Yang Z,Tao S Z,Yuan X J,Hou L H,Yang H,Xu C C,Li D H,Bai B,Wang L. 2012. Types,characteristics,genesis and prospects of conventional and unconventional hydrocarbon accumulations: taking tight oil and tight gas in China as an instance. Acta Petrolei Sinica, 33(2): 173-187. [25] Higgs K E,Zwingmann H,Reyes A G,Funnell R H. 2007. Diagenesis,porosity evolution,and petroleum emplacement in tight gas reservoirs,Taranaki Basin,New Zealand. Journal of Sedimentary Research, 77(12): 1003-1025. [26] Oelkers E H,Schott J. 1995. Experimental study of anorthite dissolution and the relative mechanism of feldspar hydrolysis. Geochimica et Cosmochimica Acta, 59: 5039-5053. [27] Thyne G,Boudreau B,Ramm M,Midtbo R. 2001. Simulation of potassium feldspar dissolution and illitization in the Statfjord Formation,North Sea. AAPG Bulletin, 85(4): 621-635. [28] Tobin R C,McClain T,Lieber R B,Ozkan A,Banfield L A,Marchand A M E,McRae L E. 2010. Reservoir quality modeling of tight-gas sands in Wamsutter field: integration of diagenesis,petroleum systems,and production data. AAPG Bulletin, 94(8): 1229-1266. [29] Zhang L P,Bai G P,Luo X R,Ma X H,Chen M J,Wu M H,Yang W X. 2009. Diagenetic history of tight sandstones and gas entrapment in the Yulin Gas Field in the central area of the Ordos Basin,China. Marine and Petroleum Geology, 26(6): 974-989.
