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榆林-神木地区上古生界盒8段及山2段气层的成岩作用和成岩相
刘小洪 罗静兰 张三 林潼
摘 要:榆林-神木地区上古生界盒8段和山2段储集岩以石英砂岩、岩屑砂岩和岩屑质石英砂岩为主,成岩作用类型包括压实作用、胶结作用、交代蚀变作用、重结晶作用和溶蚀作用.砂岩经历了早期成岩阶段A,B期和晚期成岩阶段A1,A2和B期的成岩演化过程.压实作用和胶结作用是砂岩孔隙度降低的主要原因,分别造成22%和15%的原生孔隙丧失.砂岩中粘土矿物晶间微孔隙占总孔隙的60%以上,是砂岩的主要储集空间;溶解作用形成的次生孔隙在一定程度上改善了砂岩的储集性能;构造裂隙孔对砂岩储集性能的改善不明显.研究区发育6种不同成因类型的成岩相带,其中石英加大胶结组合孔隙相和自生粘土衬边胶结溶蚀孔相是最有利的天然气储集相带,二者的叠加和改造部位是气藏发育的最有利地带;粘土杂基充填微孔相和自生粘土胶结晶间孔相是较有利的成岩储集相带;杂基蚀变水云母充填压实紧密相和钙质胶结交代致密相不利于孔隙的发育和天然气的储集.
关键词:成岩作用;成岩相;含气砂岩储层;上古生界;榆林-神木地区;鄂尔多斯盆地
分类号:TE112.2 文献标识码:A
文章编号:0253-9985(2006)02-0200-09
Diagenesis and diagenetic facies of gas reservoirs in the Upper Paleozoic 8th member of Shihezi Fm and 2nd member of Shanxi Fm in Yulin-Shenmu area, Ordos basin
Liu Xiaohong Luo Jinglan Zhang San Lin Tong
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基金项目:国家重点基础研究发展计划(973)项目(2003CB214603);长江学者和创新团队发展计划资助项目(IRT0559)
作者简介:刘小洪(1980-),女,博士生,储层沉积学
作者单位:刘小洪(西北大学,地质学系,大陆动力学国家重点实验室,陕西,西安,710069)
罗静兰(西北大学,地质学系,大陆动力学国家重点实验室,陕西,西安,710069)
张三(西北大学,地质学系,大陆动力学国家重点实验室,陕西,西安,710069)
林潼(西北大学,地质学系,大陆动力学国家重点实验室,陕西,西安,710069)
参考文献:
[1]付锁堂,田景春,陈洪德,等.鄂尔多斯盆地晚古生代三角洲沉积体系平面展布特征[J].成都理工大学学报(自然科学版),2003,30(3):236 240Fu Suotang,Tian Jingchun,Chen Hongde,et al.The delta depositional system distribution of Late Paleozoic era in Ordos basin[J].Journal of Chengdu University of Technology (Science & Technology Edition),2003,30 (3):236-240
[2]李良,袁志祥,惠宽洋,等.鄂尔多斯盆地北部上古生界天然气聚集规律[J].石油与天然气地质,2000,21(3):268~271Li Liang,Yuan Zhixiang,Hui Kuanyang,et al.Accumulation regularity of Upper Paleozoic gas in north Ordos basin[J].Oil & Gas Geology,2000,21 (3):268-271
[3]马新华.鄂尔多斯盆地上古生界深盆气特点与成藏机理探讨[J].石油与天然气地质,2005,26(2):231 236Ma Xinhua.Discussion on characteristics and reservoiring mechanism of deep basin gas in Upper Paleozoic in Ordos basin[J].Oil & Gas Geology,2005,26 (2):231-236
[4]李士祥,胡明毅,李霞.榆林气田山西组2段砂岩成岩作用及孔隙演化[J].天然气地球科学,2005,16(2):200~205Li Shixiang,Hu Mingyi,Li Xia.Diagenesis and porosity evolution of the sandstone of member 2 in Shanxi Formation,Yulin gasfield[J].Natural Gas Geoscience,2005,16 (2):200-205
[5]任战利.中国北方沉积盆地构造热演化史研究[M].北京:石油工业出版社,1999.67~70Ren Zhanli.Research on tectonic thermal evolution history of the North China depositional basins[M].Beijing:Petroleum Industry Press,1999.67 -70
[6]罗静兰,张成立,阎世可,等.盆地埋藏史及其对砂岩储层物性演化的影响--以陕北延长油区砂岩储层为例[J].石油与天然气地质,2001,22(2):123~127Luo Jinglan,Zhang Chengli,Yan Shike,et al.Effect of burial history on physical property of sandstone reservoirs:take Yanchang oil region in North Shaanxi as an example[J].Oil & Gas Geology,2001,22(2):123-127
[7]侯洪斌,牟泽辉,朱宏权.鄂尔多斯盆地北部上古生界天然气成藏条件与勘探方向[M].北京:石油工业出版社,2004.126~128Hou Hongbin,Mou Zehui,Zhu Hongquan.Gas-pool forming conditions and exploration directions of the Upper Paleozoic gas reservoirs in the northern Ordos basin[M].Beijing:Petroleum Industry Press,2004.126-128
[8]裘亦楠,薛叔浩.油气储层评价技术[M].北京:石油工业出版社,1994.59~64Qiu Yinan,Xue Shuhao.Evaluation technology for oil and gas reservoirs[M].Beijing:Petroleum Industry Press,1994.59 -64
[9]罗静兰,张晓莉,张云翔,等.成岩作用对河流-三角洲相砂岩储层物性演化的影响--以延长油区上三叠统延长组长2砂岩为例[J].沉积学报,2001,19(4):541~547Luo Jinglan,Zhang Xiaoli,Zhang Yunxiang,et al.The diagenetic impact on reservior-quality evolution of fluvial-deltaic sandstones:taking an exanmple from the Upper Triassic sandstones of Chang 2 Formation in the Yanchang oil field[J].Acta Sedimentologica Sinica,2001,19 (4):541-547
[10]Worden R H,Morad S.clay minerals in sandstones:control on formation,distribution and evolution[J].Int Assoc Sedimental,Spec Publ,2003,34:3 -41
[11]王琪,史基安,薛莲花,等.碎屑储集岩成岩演化过程中流体-岩石相互作用特征--以塔里木盆地西南坳陷地区为例[J].沉积学报,1999,17(4):584~590Wang Qi,Shi Ji' an,Xue Lianhua,et al.Characteristics of fluidrock interaction in clastic reservoir controlled by evolution of diagenetic environment:taking the southwest depression of Tarim basin as an example[J].Acta Sedimentologica Sinica,1999,17(4):584 -590
[12]袁静,赵澄林.水介质的化学性质和流动方式对深部碎屑岩储层成岩作用的影响[J].石油大学学报(自然科学版),2000,24(1):60~63Yuan Jing,Zhao Chenglin.Influence of chemistry of fluid and circulated convection current on diagenesis of petroclastic rock in deep formation[J].Journal of University of Petroleum,2000,24(1):60 -63
[13]Hurst A,Nadeau P H.Clay microporosity in reservoir sandstones:an application of quantitative electron microscopy in petrophysical evaluation[J].AAPG Bulletin,1995,79 (4):563-573
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