四川盆地东部中二叠统茅口组热液白云岩发育模式及对储层的改造

doi:10.11743/ogg20200112

摘要/Abstract

摘要：

针对四川盆地东部中二叠统茅口组异常白云岩分布，利用岩心岩石学特征描述、地化测试、地震和测井资料综合解释等方法，分析了热液白云岩化作用的识别标志和发育时间，探讨了其成因模式及对储层改造。研究结果表明：不规则白云岩分布、中-粗晶基质白云岩、早期张性裂缝和溶洞中以充填鞍形白云石和石英-鞍形白云石是主要识别标志，白云石流体包裹体均一温度（115~145℃）高于地层温度，偏负的氧同位素值[δ¹⁸O（VPDB）为-5.4‰~-7.1‰]，高锶同位素比值（⁸⁷Sr/⁸⁶Sr为0.707 947~0.708 458），是识别热液的主要地化指标。热液白云岩化作用主要发生在张性或扭张性断裂系统附近，其成层性受原始沉积相控制，在断裂破碎带附近灰岩地层也被热液改造。热液改造主要时期是在茅口组经历浅埋藏、抬升暴露岩溶作用和吴家坪组沉积之后的晚二叠世-中三叠世。峨眉山玄武岩喷发为热液提供了热源，断裂、沉积相和热液侵入时间等因素在时间和空间上组合，造就了热液白云岩形成的条件和不同的分布形式。热液白云岩化作用对储层的改造具有复杂性，低渗透性灰岩层热液云化后新增孔隙空间不明显，具有初始空隙的高能滩体受热液云化适度改造后可能存在一定孔渗性。

关键词: 热液白云岩化, 识别标志, 储层改造, 茅口组, 四川盆地

Abstract:

Based on the distribution of abnormal dolomites in the Maokou Formation, eastern Sichuan Basin, we analyzed the identification markers and timing of hydrothermal dolomitization (HTD), and discussed its genetic model and reservoir modification by means of petrological description of cores, geochemical testing, as well as comprehensive interpretation of seismic and logging data. The results indicate that the main identification markers include irregular dolomite distribution, medium-to-coarse crystalline matrix dolomite, saddle dolomite and quartz-saddle dolomite in the earlier tensile fractures and cavens. The homogenization temperature of dolomite fluid inclusions(115-145℃)being higher than the host formations, more negative oxygen isotope (δ¹⁸O(VPDB)-5.4‰-7.1‰), and increased strontium isotope (⁸⁷Sr/⁸⁶Sr 0.707 947-0.708 458) are the main geochemical indicators of hydrothermal activities. HTD mainly occurred near tensional or transtentional fault systems, and its stratification is controlled by original sedimentary facies. The limestone formations near the fracture/fault zones were also altered by hydrothermal fluids. The main stage of HTD alteration is the Late Permian-Middle Triassic after the shallower burial and karstification via uplifting and explosion of the Maokou Formation and the deposition of the Wujiaping Formation. The eruption of Emei basalt served as heat source for hydrothermal fluids, and the factors such as faults, sedimentary facies and the intrusion of hydrothermal fluids are coupled in time and space, resulting in the development and various distribution patterns of hydrothermal dolomites. The effect of HTD on reservoir modification is complex.The newly-generated pore space is not remarkable in lower-permeability limestones under HTD, while the high-energy beach facies with initial pores may preserve certain porosity and permeability under HTD.

Key words: hydrothermal dolomitization(HTD), identification marker, reservoir modification, Maokou Formation, Sichuan Basin

中图分类号:

TE122.2

张涛,林娟华,韩月卿,等. 四川盆地东部中二叠统茅口组热液白云岩发育模式及对储层的改造[J]. 石油与天然气地质, 2020, 41(1): 132-143, 200. doi: 10.11743/ogg20200112 Tao Zhang,Juanhua Lin,Yueqing Han,et al. Pattern of hydrothermal dolomitization in the Middle Permian Maokou Formation, eastern Sichuan Basin, and its alteration on reservoirs herein[J]. Oil & Gas Geology, 2020, 41(1): 132-143, 200. doi: 10.11743/ogg20200112

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参考文献 27

1	何幼斌, 冯增昭. 四川盆地及其周缘下二叠统细-粗晶自云岩成因探讨[J]. 江汉石油学院学报, 1996, 18 (4): 15- 20.
	He Youbin , Feng Zengzhao . Origin of fine-to coarse-grained Dolostones of Lower Permian in Sichuan Basin and its peripheral regions[J]. Journal of Jianghan Petroleum Institute, 1996, 18 (4): 15- 20.
2	王运生, 金以钟. 四川盆地下二叠统白云岩及古岩溶的形成与峨眉地裂运动的关系[J]. 成都理工学院学报, 1997, 24 (1): 8- 16.
	Wang Yunsheng , Jin Yizhong . The formation of dolomite and paleokarst of the lower permain series in Sichuan Basin and the relation to the Emei taphrogenesis[J]. Journal of Chengdu University of Technology, 1997, 24 (1): 8- 16.
3	蒋志斌, 王兴志, 曾德铭, 等. 川西北下二叠统栖霞组有利成岩作用与孔隙演化[J]. 中国地质, 2009, 36 (1): 101- 109.
	Jiang Zhibin , Wang Xingzhi , Zeng Demin , et al. Constructive diagenesis and porosity evolution in the Lower Permian Qixia Formation of Northwest Sichua[J]. Geology in China, 2009, 36 (1): 101- 109.
4	黄思静, 兰叶芳, 黄可可, 等. 四川盆地西部中二叠统栖霞组晶洞充填物特征与热液活动记录[J]. 岩石学报, 2014, 30 (3): 687- 698.
	Huang Sijing , Lan Yefang , Huang Keke . Vug fillings and records of hydrothermal activity in the Middle Permian Qixia Formation, Western Sichuan Basin[J]. Acta Petrologica Sinica, 2014, 30 (3): 687- 698.
5	陈轩, 赵文智, 张利萍, 等. 川中地区中二叠统构造热液白云岩的发现及其勘探意义[J]. 石油学报, 2012, 33 (4): 562- 569.
	Chen Xuan , Zhao Wenzhi , Zhang Liping , et al. Discovery and exploration significance of structure-controlled hydrothermal dolomites in the Middle Permian of the central Sichuan Basin[J]. Acta Petrolei Sinica, 2012, 33 (4): 562- 569.
6	唐雪松, 谭秀成, 刘宏, 等. 四川盆地东部中二叠统茅口组白云岩及云质硅岩储层特征与发育规律[J]. 石油与天然气地质, 2016, 37 (5): 731- 743.
	Tang Xuesong , Tan Xiucheng , Liu Hong . Characteristics and development mechanism of dolomite and dolomitic quartzite reservoirs of the Middle Permian Maokou Formation in eastern Sichuan Basin[J]. Oil & Gas Geology, 2016, 37 (5): 731- 743.
7	杨光, 汪华, 沈浩, 等. 四川盆地中二叠统储层特征与勘探方向[J]. 天然气工业, 2015, 35 (7): 10- 16.
	Yang Guang , Wang Huan , Shen Hao , et al. Characteristics and exploration prospects of Middle Permian reservoirs in the Sichuan Basin[J]. Natural Gas Industry, 2015, 35 (7): 10- 16.
8	舒晓辉, 张军涛, 李国蓉, 等. 四川盆地北部栖霞组-茅口组热液白云岩特征与成因[J]. 石油与天然气地质, 2012, 33 (3): 442- 458.
	Shu Xiaohui , Zhang Juntao , Li Guorong . Characteristics and genesis of hydrothermal dolomites of Qixia and Maokou Formations in northern Sichuan Basin[J]. Oil & Gas Geology, 2012, 33 (3): 442- 458.
9	Davies G R , Smith L B . Structurally controlled hydrothermal dolomite reservoir facies:An overview[J]. AAPG Bulletin, 2006, 90 (11): 1641- 1690. doi: 10.1306/05220605164
10	刘宝珺, 许效松. 中国南方岩相古地理图集[M]. 北京: 科学出版社, 1993: 12- 34.
	Liu Baojun , Xu Xiaosong . Maps of paleo-lithofacies, South China[M]. Beijing: Science Press, 1993: 12- 34.
11	Sun Q A . Reappraisal of dolomite abundance and occurrence in the Phanerozoic[J]. Journal of SedimentaryResearch, 1994, 64 (2): 396- 404.
12	陈代钊. 构造-热液白云岩化作用与白云岩储层[J]. 石油与天然气地质, 2008, 29 (5): 614- 622.
	Chen Daizhao . Structure-controlled hydrothermal dolomitization and hydrothermal dolomite reservoirs[J]. Oil & Gas Geology, 2008, 29 (5): 614- 622.
13	张涛, 苏玉山, 佘刚, 等. 热液白云岩发育模式一以扎格罗斯盆地白垩系A油田为例[J]. 石油与天然气地质, 2015, 36 (3): 393- 401.
	Zhang Tao , Su Yushan , She Gang . A study on the genetic model of hydrothermal dolomitization-taking oilfield A in the Cretaceous in Zagros basin as an example[J]. Oil & Gas Geology, 2015, 36 (3): 393- 401.
14	卿海若, 陈代钊. 非热液成因的鞍形白云石:来自加拿大萨斯喀彻温省东南部奥陶系Yeoman组的岩石学和地球化学证据[J]. 沉积学报, 2010, 28 (5): 981- 986.
	Qing Hairuo , Chen Daizhao . Non-hydrothermal saddle dolomite:Petrological and geochemical evidence from the Ordovician Yeoman Formation, southeastern Saskatchewan, Canada[J]. Acta Sedimentological Sinica, 2010, 28 (5): 981- 986.
15	刘建强, 郑浩夫, 刘波, 等. 川中地区中二叠统茅口组白云岩特征及成因机理[J]. 石油学报, 2017, 38 (4): 386- 398.
	Liu Jianqiang , Zheng Haofu , Liu Bo , et al. Characteristics and genetic mechanism of the dolomite in the Middle Permian Maokou Formation, central Sichuan area[J]. Acta Petrolei Sinica, 2017, 38 (4): 386- 398.
16	黄思静, 黄喻, 兰叶芳, 等. 四川盆地东北部晚二叠世-早三叠世白云岩与同期海水锶同位素组成的对比研究[J]. 岩石学报, 2011, 27 (12): 3832- 3842.
	Huang Sijing , Huang Yu , Lan Yefang , et al. A comparative study on strontium isotope composition of dolomites andtheir coeval seawater in the Late Permian-Early Triassic, NE Sichuan basin[J]. Acta Petrologica Sinica, 2011, 27 (12): 3832- 3842.
17	王利超, 胡文瑄, 王小林, 等. 白云岩化过程中锶含量变化及锶同位素分馏特征与意义[J]. 石油与天然气地质, 2016, 37 (4): 464- 472.
	Wang Lichao , Hu Wenxuan , Wang Xiaolin , et al. Variation of Sr content and 87Sr/86Sr isotope fractionation duringdolomitization and their implications[J]. Oil & Gas Geology, 2016, 37 (4): 464- 472.
18	罗志立, 孙玮, 韩建辉, 等. 峨眉地幔柱对中上扬子区二叠纪成藏条件影响的探讨[J]. 地学前缘, 2012, 19 (6): 144- 154.
	Luo Zhili , Sun Wei , Han Jianhu , et al. Effect of Emei mantle plume on the conditions of Permian petroleum accumulation in middle-upper Yangtze Area[J]. Earth Science Frontiers, 2012, 19 (6): 144- 154.
19	李华芹, 王登红, 任海涛, 等. 四川攀西地区层状基性-超基性岩体SHRIMP锆石U-Pb年龄及其地质意义[J]. 地质通报, 2017, 36 (5): 691- 697.
	Li Huaqin , Wang Denghong , Ren Haitao , et al. Zircon SHRIMP U-Pb age of the layered mafic rock mass in Panxi area, Sichuan Province, and its geological significance[J]. Geological Bulletin of China, 2017, 36 (5): 691- 697.
20	全国地层委员会. 中国地层指南及中国地层指南[M]. 北京: 地质出版社, 2001: 41- 43.
	All-China Stratigraphic Commission . Chinese stratigraphic guide and Chinese stratigraphic guide[M]. Beijing: Geological Press, 2001: 41- 43.
21	朱传庆, 徐明, 袁玉松, 等. 峨眉山玄武岩喷发在四川盆地的地热学响应[J]. 科学通报, 2010, 55 (6): 474- 482.
	Zhu Chuanqing , Xu Ming , Yuan Yusong , et al. Geothermal response of mount Emei basalt eruption in Sichuan Basin[J]. Science China Press, 2010, 55 (6): 474- 482.
22	李任伟, 吴俊, 吴汉国. 四川南桐地区二叠系长兴组和茅口组灰岩中沥青的来源[J]. 地质科学, 1992, (S1): 178- 189.
	Li Renwei , Wu Jun , Wu Hanguo . Study of sources of solid bitumens in limestones of Permian Maokou and Changxing groups in Nantong area, Sichuan province, China[J]. Scientia Geologica Sinica, 1992, (S1): 178- 189.
23	朱东亚, 金之钧, 胡文瑄. 塔北地区下奥陶统白云岩热液重结晶作用及其油气储集意义[J]. 中国科学:地球科学, 2010, 40 (2): 156- 170.
	Zhu Dongya , Jin Zhijun , Hu Wenxuan . Hydrothermal recrystallization of the Lower Ordovician dolomite and its significance to reservoir in northern Tarim Basin[J]. Science China:Earth Science, 2010, 40 (2): 156- 170.
24	Effenberger H , Mereiter K , Zemann J . Crystal structure refinements of magnesite, calcite, rhodochrosite, siderite, smithonite, and dolomite, with discussion of some aspects of the stereochemistry of calcite type carbonates[J]. Zeitschrift Fur Kristallgraphie, 1981, 156, 233- 243.
25	蒋裕强, 谷一凡, 李开鸿, 等. 四川盆地中部中二叠统热液白云岩储渗空间类型及成因[J]. 天然气工业, 2018, 38 (2): 16- 24.
	Jiang Yuqiang , Gu Yifan , Li Kaihong , et al. Spacetypes and origins of hydrothermal dolomite reservoirs in the Middle Permian strata, Central Sichuan Basin[J]. Natural Gas Industry, 2018, 38 (2): 16- 24.
26	张学丰, 李晓锋, 李宗杰, 等. 白云岩的残余结构及其沉积相的意义——以塔中地区中-下奥陶统为例[J]. 石油与天然气地质, 2017, 38 (4): 722- 728.
	Zhang Xuefeng , Li Xiaofeng , Li Zongjie , et al. Relict texture of dolostones and its significance to sedimentary facies:A case study from the Middle-Lower Ordovician in Tazhong area, Tarim Basin[J]. Oil & Gas Geology, 2017, 38 (4): 722- 728.
27	唐雪松, 谭秀成, 刘宏, 等. 四川盆地东部中二叠统茅口组白云岩及云质硅岩储层特征与发育规律[J]. 石油与天然气地质, 2016, 37 (5): 731- 743.
	Tang Xuesong , Tan Xiucheng , Liu Hong , et al. Characteristics and development mechanism of dolomite and dolomitic quartzite reservoirs of the Middle Permian Maokou Formation in eastern Sichuan Basin[J]. Oil & Gas Geology, 2016, 37 (5): 731- 743.

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