四川盆地川西坳陷须家河组砂岩致密化研究

李嵘; 张娣; 朱丽霞

doi:10.11781/sysydz201103274

四川盆地川西坳陷须家河组砂岩致密化研究

doi: 10.11781/sysydz201103274

成都地质矿产研究所, 成都610081

基金项目: 国家科技重大专项项目(2008ZX05002-004)资助

详细信息

作者简介:
李嵘(1967- ),男,副研究员,从事油气地质研究.E-mail:goest33@sina.com.

中图分类号: TE122.2
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出版历程
- 收稿日期: 2011-01-06
- 修回日期: 2011-04-11
- 刊出日期: 2011-06-28

Densification of Upper Triassic Xujiahe tight sandstones, Western Sichuan, China

Chengdu Institute of Geology and Mineral Resources, Chengdu, Sichuan 610081, China

摘要

摘要: 从岩石学特征、成岩作用特征、储集空间类型研究入手,并结合盆地模拟分析结果,对四川盆地川西坳陷须家河组砂岩致密化进程进行系统分析。导致须家河组砂岩致密化的主要成岩事件包括机械和化学压实作用、碳酸盐胶结物及自生石英的沉淀。压实作用是造成砂岩孔隙度降低的最主要因素,较高石英、长石、钙屑含量可以提高岩石抗机械压实能力。碳酸盐胶结作用在须四段钙屑砂岩和须二段细粒砂岩中较为普遍,对储层具有明显的破坏作用。相对开放环境以及古构造高位置不利于碳酸盐胶结物的沉淀,对储层发育有利。自生石英主要来自碎屑石英的压溶,具一定厚度、连续性较好的绿泥石衬边可以抑制压溶作用进行以及石英胶结物的形成,对须家河组砂岩储层孔隙保存具有双倍积极作用。
- 须家河组 /
- 致密储层 /
- 成岩作用 /
- 绿泥石衬边 /
- 川西坳陷 /
- 四川盆地
Abstract: Densification process of the Upper Triassic Xujiahe sandstones were described based on petrologic,diagenesis and basin modeling analyses.The diagenetic events that affect reservoir quality mainly include mechanical and chemical compactions,precipitation of carbonate cements,and cementation by quartz.Compaction is the dominant process of porosity loss.Sandstones with high content of quartz,feldspar and carbonate rock fragment exhibit higher mechanical stability.Pervasive mesogenetic carbonate cementation occurs in the calcarenaceous sandstones in T₃x⁴ and the fine-grained sandstones in T₃x² and reservoir quality is significantly deteriorated by extensive carbonate cementation.Open and paleo-high environment is favorable for relatively good reservoir quality.Quartz cements are mainly sourced by the pressure dissolution of detrital quartz and are more abundant in sandstones rich in detrital quartz and illite and poor in carbonate cements and chlorite.Thick and continuous chlorite pore-linings help to preserve porosity by inhibiting pressure dissolution and quartz cementation and thus can be doubly beneficial to the Xujiahe sandstones.
- Triassic Xujiahe Formation /
- tight reservoir /
- diagenesis /
- chlorite pore-linings /
- Western Sichuan Depression /
- Sichuan Basin

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参考文献(26)

[1]	杨长清,刘树根,曹波,等.龙门山造山带与川西前陆盆地耦合关系及其对油气成藏的控制[J].成都理工大学学报(自然科学版),2008,35(4):471-476.
[2]	李书兵,何鲤,柳梅青.四川盆地晚三叠世以来陆相盆地演化史[J].天然气工业,1999,19(增刊):18-23.
[3]	罗啸泉,陈兰.川西坳陷形成演化及其与油气的关系[J].油气地质与采收率,2004,11(1):16-19.
[4]	曾洪扬,陈洪德,林良彪,等.川西前陆盆地晚三叠世构造层序岩相古地理特征[J].石油实验地质,2009,31(1):46-49.
[5]	蔡希源.深层致密砂岩气藏天然气富集规律与勘探关键技术:以四川盆地川西坳陷须家河组天然气勘探为例[J].石油与天然气地质,2010,31(6):707-714.
[6]	蒋裕强,郭贵安,陈义才,等.蜀南河包场地区须家河组气藏成藏机理及成藏模式[J].石油实验地质,2010,32(4);314-318.
[7]	吕正祥.川西孝泉构造上三叠统超致密储层演化特征[J]. 都理工大学学报(自然科学版),2005,32(1):22-26.
[8]	吕正祥,刘四兵.川西须家河组超致密砂岩成岩作用与相对优质储层形成机制[J].岩石学报,2009,25(10):2373-2383.
[9]	Xu Zhangyou,Zhang Xiaoyu,Wu Shenghe,et al.Genesis of the low-permeability reservoir bed of Upper Triassic Xujiahe Formation in Xinchang gas field,Western Sichuan Depression[J].Petroleum Science,2008,5 (3):230-237.
[10]	苏永进,唐跃刚,张世华,等.川西坳陷上三叠统天然气成藏主控因素及形成模式[J].石油与天然气地质,2010,31(1):107-113.
[11]	冯明石,刘家铎,孟万斌,等.四川盆地中西部须家河组储层特征与主控因素[J].石油与天然气地质,2009,30(6):713-719.
[12]	Folk R L.Petrology of sedimentary rocks[M].Austin:Hemphill,1968:107.
[13]	Dickinson W,Suczec C.Plate tectonics and sandstone compositions[J].AAPG Bulletin,1979,63:2164-2182.
[14]	Houseknecht D W.Assessing the relative importance of compaction processes and cementation to reduction of porosity in sandstones[J].AAPG Bulletin,1987,71:633-642.
[15]	Ehrenberg S N.Assessing the relative importance of compaction processes and cementation to reduction of porosityin sandstones:Discussion; Compaction and porosity evolution of Pliocene sandstones,Ventura Basin,California:Discussion[J].AAPG Bulletin,1989,77:1260-1286.
[16]	Morad S,Al-Ramadan K,Ketzer J M,et al.The impact of diagenesis on the heterogeneity of sandstone reservoirs:A review of the role of depositional facies and sequence stratigraphy[J].AAPG Bulletin,2010,94(8):1267-1309.
[17]	Beard D C,Weyl P K.Influence of texture on porosity and permeability of unconsolidated sand[J].AAPG Bulletin,1973,57(2):349-369.
[18]	Friedman I,O'Neil J R.Compilation of stable isotope fractionation factors of geochemical interest[G]//Fleischer M.Data of geochemistry.6th ed.Washington D C:USGS,1977:1-12.
[19]	Berger A,Gier S,Krois P.Porosity-preserving chlorite cements in shallow-marine volcanidasfic sandstones:Evidence from Cretaceous sandstones of the Sawan gas field,Pakistan[J].AAPG Bulletin,2009,93(5):595-615.
[20]	Billault V,Beaufort D,Baronet A,et al.A nanopetrographic and textural study of grain-coating chlorites in sandstone reservoirs[J].Clay Minerals,2003,38(3):315-328.
[21]	黄思静,谢连文,张萌,等.中国三叠系陆相砂岩中自生绿泥石的形成机制及其与储层孔隙保存的关系[J].成都理工大学学报(自然科学版),2004,31(3):273-281.
[22]	Worden R H,Morad S.Clay minerals in sandstones:Controls on formation,distribution and evolution[M]//Worden R H,Morad S.Clay mineral cements in sandstones.Oxford:Blackwell Science,2003:1-41.
[23]	Fisher Q J,Knipe R,Worden R H.Micro-structures of deformed and non-deformed sandstones from the North Sea:Implication for the origins of quartz cement in sandstones[G]//Worden R H,Morad S.Quartz cementation in sandstones.Oxford:Blackwell Science,2000:129-146.
[24]	Pittman E D,Lumsden D N.Relationship between chlorite coatings on quartz grains and porosity,Spiro sand,Oklahoma[J].Journal of Sedimentary Petrology,1968,38:668-670.
[25]	Luo J L,Morad S,Salem A,et al.Impact of diagenesis on reservoir quality evolution in fluvial and lacustring-deltaic sandstones:Evidence from Jurassic and Triassic sandstones from the Ordos Basin,China[J].Journal of Petroleum Geology,2009,32(1):79-102.
[26]	Wilkinson M,Haszeldine R S,Ellam R M,et al.Hydrocarbon filling history from diagenesis evidence:Brent Group,UK North Sea[J].Marine and Petroleum Geology,2004,21:443-455.