川西坳陷须二段次生石英形成机理及其对储集层物性的影响

doi:10.7657/XJPG20230104

摘要/Abstract

摘要：

次生石英胶结物是影响川西坳陷三叠系须家河组二段储集层物性的重要自生矿物，为明确其形成机理，寻找相对优质储集层，运用铸体薄片、扫描电镜、阴极发光、包裹体测温、石英氧同位素等实验分析，对须二段砂岩中次生石英的硅质来源及其对储集层的影响进行了研究。研究区须二段砂岩次生石英可分为3期，早期大气淡水和有机酸参与下，钾长石和酸性斜长石溶蚀生成硅质，是成岩早期和成岩中期次生石英形成的主要原因；砂岩中压实压溶作用和黏土矿物转化生成硅质，是成岩中—晚期较高温度下次生石英生成的重要原因。早期次生石英虽然占据了部分孔隙，但可以通过提高岩石的机械强度，抑制压实作用，有利于原生孔隙的保存；而中—晚期次生石英由于形成时间较晚，大部分为溶蚀作用和压溶作用的产物，占据了溶蚀孔隙和原生孔隙，是储集层致密化的重要因素。

关键词: 川西坳陷, 须家河组, 次生石英, 包裹体, 氧同位素比值, 硅质, 形成机理, 影响因素

Abstract:

Secondary quartz cement is one of the important authigenic minerals affecting the physical properties of the second member of Xujiahe formation (Xu 2 member) reservoir in the Western Sichuan depression. In order to clarify the formation mechanism of secondary quartz and search for high-quality reservoirs，the silica source of secondary quartz in the Xu 2 member sandstone and its effect on the reservoir were analyzed by experimental methods such as casting thin section，scanning electron microscopy (SEM)，cathodoluminescence，inclusion temperature measurement，and quartz oxygen isotopes. The secondary quartz in the sandstone of Xu 2 member can be divided into 3 stages. The silica formed by the dissolution of K-feldspar and acid plagioclase with the participation of early atmospheric fresh water and organic acid is the main contributor to the formation of secondary quartz in the early-middle diagenetic stage. The silica produced by the compaction and pressolution in the sandstone and the transformation of clay minerals is a key cause for the formation of secondary quartz at relatively high temperatures in the middle-late diagenetic stage. Although the early secondary quartz occupies a part of the pores，the mechanical strength of the rock can be enhanced to inhibit the compaction，which is beneficial to the preservation of primary pores. The secondary quartz formed in the middle-late diagenetic stages was mostly the product of dissolution and pressolution and occupies the dissolution pores and primary pores，which is an important factor for reservoir densification.

Key words: Western Sichuan depression, Xujiahe formation, secondary quartz, inclusion, oxygen isotope ratio, silica, formation mechanism, influencing factor

中图分类号:

TE122.2

章顺利, 杨映涛, 张玲, 操延辉. 川西坳陷须二段次生石英形成机理及其对储集层物性的影响[J]. 新疆石油地质, 2023, 44(1): 25-32.

ZHANG Shunli, YANG Yingtao, ZHANG Ling, CAO Yanhui. Formation Mechanism of Secondary Quartz and Its Influence on Physical Properties of Xu 2 Member Reservoir in Western Sichuan Depression[J]. Xinjiang Petroleum Geology, 2023, 44(1): 25-32.

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参考文献 39

[1]	BJORLYKKE K, EGEBERG P. Quartz cementation in sedimentary basins[J]. AAPG Bulletin, 1993, 77(9):1538-1 548.
[2]	WORDEN R H, MORAD S. Quartz cementation in sandstones[M]. International Association of Sedimentologists,Special Publication,Blackwell Science,Oxford, 2000.
[3]	MARCHAND A M E, MACAULAY C I, HASZELDINE R S, et al. Pore water evolution in oilfield sandstones:constraints from oxygen isotope microanalyses of quartz cement[J]. Chemical Geology, 2002, 191(4):285-304. doi: 10.1016/S0009-2541(02)00137-7
[4]	LANDER R H, LARESE R E, BONNELL L M, et al. Toward more accurate quartz cement models:the importance of euhedral versus noneuhedral growth rates[J]. AAPG Bulletin, 2008, 92(11):1537-1 563.
[5]	MCBRIDE E F. Quartz cement in sandstones:a review[J]. Earth-Science Reviews, 1989, 26(1):69-112. doi: 10.1016/0012-8252(89)90019-6
[6]	武文慧, 黄思静, 陈洪德, 等. 鄂尔多斯盆地上古生界碎屑岩硅质胶结物形成机制及其对储集层的影响[J]. 古地理学报, 2011, 13(2):193-200.
	WU Wenhui, HUANG Sijing, CHEN Hongde, et al. Origin of siliceous cement in the Upper Paleozoic clastic rocks in Ordos basin and its effects on reservoir quality[J]. Journal of Palaeography, 2011, 13(2):193-200.
[7]	伍劲, 王波, 朱超, 等. 库车坳陷东部下侏罗统煤系地层碎屑岩中长石溶蚀对储集层物性的影响[J]. 新疆石油地质, 2019, 40(6):650-657.
	WU Jin, WANG Bo, ZHU Chao, et al. Influences of feldspar dissolution on reservoir physical properties of clastics in the Lower Jurassic coal measures,eastern Kuqa depression[J]. Xinjiang Petroleum Geology, 2019, 40 (6):650-657.
[8]	袁桃, 伊海生, 兰叶芳, 等. 砂岩储层石英胶结物的SiO₂来源研究综述[J]. 矿物学报, 2017, 37(1/2):168-176.
	YUAN Tao, YI Haisheng, LAN Yefang, et al. A review of research on the source of quartz cements in sandstone reservoirs[J]. Acta Mineralogica Sinica, 2017, 37(1/2):168-176.
[9]	VAN DE KAMP P C. Smectite-illite-muscovite transformations,quartz dissolution,and silica release in shales[J]. Clays and Clay Minerals, 2008, 56(1):66-81. doi: 10.1346/CCMN.2008.0560106
[10]	HARWOOD J, APLIN A C, FIALIPS C I, et al. Quartz cementation history of sandstones revealed by high-resolution SIMS oxygen isotope analysis[J]. Journal of Sedimentary Research, 2013, 83(7/8):522-530. doi: 10.2110/jsr.2013.29
[11]	OYE O J, APLIN A C, JONES S J, et al. Vertical effective stress as a control on quartz cementation in sandstones[J]. Marine and Petroleum Geology, 2018, 98:640-652. doi: 10.1016/j.marpetgeo.2018.09.017
[12]	WALDERHAUG O. Kinetic modeling of quartz cementation and porosity loss in deeply buried sandstone reservoirs[J]. AAPG Bulletin, 1996, 80(5):731-745.
[13]	LANDER R H, WALDERHAUG O. Predicting porosity through simulating sandstone compaction and quartz cementation[J]. AAPG Bulletin, 1999, 83(2/3):433-449.
[14]	WALDERHAUG O. Modeling quartz cementation and porosity in Middle Jurassic Brent group sandstones of the Kvitebjrn field,northern North sea[J]. AAPG Bulletin, 2000, 84(9):1325-1 339.
[15]	HIATT E E, KURTIS T. K, FAYEK M, et al. Early quartz cements and evolution of paleohydraulic properties of basal sandstones in three Paleoproterozoic continental basins:evidence from in-situ δ¹⁸O analysis of quartz cements[J]. Chemical Geology, 2007, 238(1):19-37. doi: 10.1016/j.chemgeo.2006.10.012
[16]	HARWOOD J. The origin and timing of quartz cementation in reservoir sandstones:evidence from in-situ microanalysis of oxygen isotopes[D]. Newcastle, Australia: Newcastle University, 2011.
[17]	HYODO A, KOZDON R, POLLINGTON A D, et al. Evolution of quartz cementation and burial history of the Eau Claire formation based on in-situ oxygen isotope analysis of quartz overgrowths[J]. Chemical Geology, 2014, 384:168-180. doi: 10.1016/j.chemgeo.2014.06.021
[18]	LONGSTAFFE F J, AYALON A. Oxygen-isotope studies of clastic diagenesis in the Lower Cretaceous Viking formation,Alberta:implications for the role of meteoric water[J]. Geological Society,London,Special Publications, 1987, 36(1):277-296. doi: 10.1144/GSL.SP.1987.036.01.20
[19]	陈冬霞, 庞雄奇, 杨克明, 等. 川西坳陷中段上三叠统须二段致密砂岩孔隙度演化史[J]. 吉林大学学报(地球科学版), 2012, 42(增刊1):42-51.
	CHEN Dongxia, PANG Xiongqi, YANG Keming, et al. Porosity evolution of tight gas sand of the second member of Xujiahe formation of Upper Triassic,western Sichuan depression[J]. Journal of Jilin University(Earth Science Edition), 2012,42 (Supp.1):42-51.
[20]	朱如凯, 邹才能, 张鼐, 等. 致密砂岩气藏储层成岩流体演化与致密成因机理:以四川盆地上三叠统须家河组为例[J]. 中国科学D辑:地球科学, 2009, 39(3):327-339.
	ZHU Rukai, ZOU Caineng, ZHANG Nai, et al. Diagenetic fluid evolution and densification mechanism of tight sandstone gas reservoirs:a case study of the Upper Triassic Xujiahe formation in Sichuan basin[J]. Science in China Series D:Earth Sciences, 2009, 39 (3):327-339.
[21]	林良彪. 川西前陆盆地上三叠统须家河组沉积相及岩相古地理演化[D]. 成都: 成都理工大学, 2005.
	LIN Liangbiao. Sedimentay facies and paleogeographic evolution of the Upper Triassic Xujiahe formation in west Sichuan foreland basin[D]. Chengdu: Chengdu University of Technology, 2005.
[22]	刘君龙, 孙冬胜, 纪友亮, 等. 川西地区晚侏罗世浅水三角洲沉积特征及主控因素[J]. 新疆石油地质, 2018, 39(4):394-400.
	LIU Junlong, SUN Dongsheng, JI Youliang, et al. Sedimentary characteristics and its main controlling factors of the Late Jurassic shallow-water delta in western Sichuan depression[J]. Xinjiang Petroleum Geology, 2018, 39 (4):394-400.
[23]	谢刚平, 朱宏权, 叶素娟, 等. 四川盆地叠覆型致密砂岩气区地质特征与评价方法[M]. 北京: 科学出版社, 2018.
	XIE Gangping, ZHU Hongquan, YE Sujuan, et al. Geological characteristics and evaluation method of superimposed tight sandstone gas area in Sichuan basin[M]. Beijing: Science Press, 2018.
[24]	南红丽, 蔡李梅, 叶素娟, 等. 川西坳陷沙溪庙组储集层致密化与天然气成藏耦合关系[J]. 新疆石油地质, 2018, 39(4):439-445.
	NAN Hongli, CAI Limei, YE Sujuan, et al. Coupling relationship between reservoir densification and natural gas accumulation in Shaximiao formation in western Sichuan depression[J]. Xinjiang Petroleum Geology, 2018, 39 (4):439-445.
[25]	杨威, 魏国齐, 李跃纲, 等. 川西地区须家河组二段储层发育的主控因素和致密化时间探讨[J]. 天然气地球科学, 2008, 19(6):796-800.
	YANG Wei, WEI Guoqi, LI Yuegang, et al. Main controlling factors and densification periods of the reservoir development of Xujiahe formation Second member,western Sichuan[J]. Natural Gas Geosciences, 2008, 19(6):796-800.
[26]	郭迎春, 庞雄奇, 陈冬霞, 等. 川西坳陷中段须二段致密砂岩储层致密化与相对优质储层发育机制[J]. 吉林大学学报(地球科学版), 2012, 42(增刊2):21-32.
	GUO Yingchun, PANG Xiongqi, CHEN Dongxia, et al. Densification of tight gas sandstones and formation mechanism of relatively high-quality reservoir in the second member of the Xujiahe formation,western Sichuan depression[J]. Journal of Jilin University (Earth Science Edition), 2012,42 (Supp. 2):21-32.
[27]	YUAN Guanghui, CAO Yingchang, GLUYAS J, et al. and trace-element constraints on the origin of quartz cementation and feldspar dissolution and the associated fluid evolution in arkosic sandstones[J]. AAPG Bulletin, 2018, 102(5):761-792. doi: 10.1306/0608171616017066
[28]	CLAYTON R N, O’NEIL J R, MAYEDA T K. Oxygen isotope exchange between quartz and water[J]. Journal of Geophysical Research, 1972, 77(17):3057-3 067.
[29]	APLIN A C, WARREN E A. Oxygen isotopic indications of the mechanisms of silica transport and quartz cementation in deeply buried sandstones[J]. Geology, 1994, 22(9):847-850. doi: 10.1130/0091-7613(1994)022<0847:OIIOTM>2.3.CO;2
[30]	GIRARD J P, MUNZ I A, JOHANSEN H, et al. Conditions and timing of quartz cementation in Brent reservoirs,Hild field,North sea:constraints from fluid inclusions and SIMS oxygen isotope microanalysis[J]. Chemical Geology, 2001, 176(1/2/3/4):73-92. doi: 10.1016/S0009-2541(00)00350-8
[31]	KORTE C, KOZUR H W, VEIZER J. δ¹³C and δ¹⁸O values of Triassic brachiopods and carbonate rocks as proxies for coeval seawater and palaeotemperature[J]. Palaeogeography,Palaeoclimatology,Palaeoecology, 2005, 226(3):287-306. doi: 10.1016/j.palaeo.2005.05.018
[32]	GIOVANNI M, MICHELE M, DAVID M, et al. A Middle-Late Triassic (Ladinian-Rhaetian) carbon and oxygen isotope record from the Tethyan ocean[J]. Palaeogeography,Palaeoclimatology,Palaeoecology, 2014, 399(3):246-259. doi: 10.1016/j.palaeo.2014.01.018
[33]	GILES M R, DE BOER R B. Origin and significance of redistributional secondary porosity[J]. Marine and Petroleum Geology, 1990, 7(4):378-397. doi: 10.1016/0264-8172(90)90016-A
[34]	丁晓琪, 韩玫梅, 张哨楠, 等. 大气淡水在碎屑岩次生孔隙中的作用[J]. 地质论评, 2014, 60(1):145-158.
	DING Xiaoqi, HAN Meimei, ZHANG Shaonan, et al. Roles of meteoric water on secondary porosity of siliciclastic reservoirs[J]. Geological Review, 2014, 60(1):145-158.
[35]	SURDAM R C, CROSSEY L J, HAGEN E S, et al. Organic-inorganic and sandstone diagenesis[J]. AAPG Bulletin, 1989, 73(1):1-23.
[36]	单祥, 郭华军, 陈希光, 等. 低渗透致密砂岩储集层致密化成因:以准噶尔盆地莫北—莫索湾凸起下侏罗统八道湾组为例[J]. 新疆石油地质, 2021, 42(1):29-37.
	SHAN Xiang, GUO Huajun, CHEN Xiguang, et al. Genesis of densification of low-permeability tight sandstone reservoirs: a case study of Lower Jurassic Badaowan formation in Mobei-Mosuowan swell,Junggar basin[J]. Xinjiang Petroloeum Geology, 2021, 42(1):29-37.
[37]	TOUSSAINT R, AHARONOV E, KOEHN D, et al. Stylolites:a review[J]. Journal of Structural Geology, 2018, 114:163-195. doi: 10.1016/j.jsg.2018.05.003
[38]	黄奕铭, Richard COLLIER. 致密砂岩储集层微观孔喉结构及其分形特征:以西加拿大盆地A区块Upper Montney段为例[J]. 新疆石油地质, 2021, 42(4):506-513.
	HUANG Yiming, Richard COLLIER. Pore Throat structure and fractal characteristics of tight sandstone reservoirs: a case study of Upper Montney formation in Block A in Western Canada sedimentary basin[J]. Xinjiang Petroloeum Geology, 2021, 42(4):506-513.
[39]	WALDERHAUG O. Kaolin-coating of stylolites,effect on quartz cementation and general implications for dissolution at mineral interfaces[J]. Journal of Sedimentary Research, 2006, 76(2):234-243. doi: 10.2110/jsr.2006.015