收稿日期: 2011-05-21
修回日期: 2011-10-14
网络出版日期: 2011-12-10
基金资助
国家科技支撑计划基金项目(编号:2007BAB17B00)；西北大学创新性实验计划项目（编号:2009041）联合资助.
Diagenesis of Chang6 Reservoir in Xuecha Block of Wuqi Area
Received date: 2011-05-21
Revised date: 2011-10-14
Online published: 2011-12-10
为评价与预测鄂尔多斯盆地吴旗地区薛岔区块长6低孔—超低渗透砂岩储层，进行油藏精细描述和高效开发,通过铸体薄片\,扫描电镜\,X\|射线衍射\,电子探针\,碳氧同位素和镜煤反射率方法研究储层成岩作用机理，揭示时空上成岩—物性演化规律。结果表明:目前长6储层主要处于晚成岩阶段的A期—B期；主要成岩作用类型有压实作用、胶结作用、交代作用、裂缝作用及烃类侵位作用；压实作用强烈是导致该储层早期孔隙丧失的根本原因；晚成岩阶段铁方解石胶结作用是造成储层物性非均质性严重的主要因素；溶蚀作用、绿泥石衬里、破裂作用及烃类侵位作用对储层物性起建设性作用；储层孔隙类型主要有残余粒间孔\,长石溶孔和岩屑溶孔，次为微孔隙及裂缝孔隙；喉道细小，分选较差，孔喉连通性差；储层微观孔隙结构非均质性严重。同时，分析储层成岩演化序列和孔隙演化史。
曹斌风，孙卫 . 吴旗地区薛岔区块延长组长6砂岩储层成岩作用研究 [J]. 天然气地球科学, 2011 , 22(6) : 951 -960 . DOI: 10.11764/j.issn.1672-1926.2011.06.951
In order to evaluate and forecast the Chang6 reservoir of low porosity and super-low permeability sandstone in Xuecha block of Wuqi area in Ordos basin,describe the reservoir subtly and develop it effectively,this paper studies the reservoir diagenetic mechanism and reveals the diagenesis-physical property evolutionary law based on the data analysis of casting lamella,scan electron microscope,-|ray diffraction,electron probe,oxygen and carbon stable isotope and vitrinite reflectance. The results show that the Chang6 reservoir is now in the late diagenetic phase A to B; main diagenesis include compaction,cementation,metasomatosis,cataclasis and hydrocarbon emplacement; the intense compaction is the radical contributor to the pore beravement in early phase and the ferroan calcite cementation in the late diagenetic phase induces the severe heterogeneity of physical property; dissolution,grain-coating chlorite,cataclasis and hydrocarbon emplacement work on physical property constructively; pore types of Chang6 reservoir mainly include primary remained intergranular pore,feldspar dissolved pore and lithic dissolved pore,secondly micropore and fracture pore; the reservoir is characterized by fine throat,worse sorting,worse connectivity; the heterogeneity of the micro-pore structure is intense. Meanwhile,reservoir diagenetic evolutionary sequence and the history of porosity evolution are analysed.
［1］He Zixin.Evolvement and Oil & Gas of Ordos Basin［M］.Beijing:Petroleum Industry Press,2003:95-105.［何自新.鄂尔多斯盆地演化与油气［M］.北京:石油工业出版社,2003:95-105.］
［2］Shou Jianfeng,Zhang Huiliang,Si Chunsong,et al.Sandstone Dynamic Diagenesis［M］.Beijing:Petroleum Industry Press,2005.［寿建峰,张惠良,斯春松,等.砂岩动力成岩作用［M］.北京:石油工业出版社,2005.］
［3］Oelkers E H,Bjorkum P A,Murphy W M.A petrographic and computational investigation of quartz cementation and porosity reduction in north sea sandstones［J］.American Journal of Science,1996,296:420-452.
［4］Zhu Ping,Huang Sijing,Li Demin,et al.Effect and protection of chlorite on clastic reservoir rocks［J］.Journal of Chengdu University of Technology:Science & Technology Edition,2004,31(2):153-156.［朱平,黄思静,李德敏,等.粘土矿物绿泥石对碎屑储集岩孔隙的保护［J］.成都理工大学学报:自然科学版,2004,31(2):153-156.］
［5］Zhang Jinliang,Si Xueqiang,Liang Jie,et al.Diagenesis of lacustrine deltaic sandstones and its impact on reservoir quality［J］.Acta Sedimentologica Sinica,2004,22(2):225-233.［张金亮,司学强,梁杰,等.陕甘宁盆地庆阳地区长8油层砂岩成岩作用及其对储层性质的影响［J］.沉积学报,2004,22(2):225-233.］
［6］Tian Jianfeng,Chen Zhenlin,Fan Yuanfang,et al.The occurrence,growth mechanism and distribution of authigenic chlorite in sandstone［J］.Bulletin of Mineralogy Petrology and Geochemistry,2008,27(2):201-205.［田建锋,陈振林,凡元芳,等.砂岩自生绿泥石的产状、形成机制及其分布规律［J］.矿物岩石地球化学通报,2008,27（2）:201-205.］
［7］Richard H Worden,Sadoon Morad.Clay Mineral Cements in Sandstones［M］.Oxford:Blackwell Science Ltd.,2003.
［8］Al-Ramadan K A,Hussain M,Iman B,et al.Lithologic characteristics and diagenesis of the Devonian Jauf sandstone at Ghawar field,eastern Saudi Arabia［J］.Marine and Petroleum Geology,2004,21(10):1221-1234.
［9］Xu Tongtai,Wang Xingxin,Zhang Youyu,et al.The Clay Minerals in Oil and Gas Basins of China［M］.Beijing:Petroleum Industry Press,2003.［徐同台,王行信,张有瑜,等.中国含油气盆地粘土矿物［M］.北京:石油工业出版社,2003.］
［10］Luo Jinglan,Liu Xiaohong,Lin Tong,et al.Impact of diagenesis and hydrocarbon emplacement on sandstone reservoir quality of the Yanchang Formation (upper Triassic) in the Ordos basin［J］.Acta Geologica Sinica,2006,80(5):664-673.［罗静兰,刘小洪,林潼,等.成岩作用与油气侵位对鄂尔多斯盆地延长组砂岩储层物性的影响［J］.地质学报,2006,80（5）:664-673.］
［11］Franca A B,Arauljo L M,Maynard J B,et al.Secondary porosity formed by deep meteoric leaching:Botucatu Eolianite,southern South America［J］.AAPG Bulletin,2003,87(7):1073-1082.
［12］Stefansson A.Dissolution of primary minerals of basalt in natural waters:I,Calculation of mineral solubilities from 0℃to 350℃［J］.Chem Geol,2001,172(3/4):225-250.
［13］Shi Ji′an,Jin Huijuan,Xue Lianhua.Analysis on mechanism of feldspar dissolution and its influencing factors in feldspar-rich sandstone reservoir［J］.Acta Sedimentologica Sinica,1994,12(3):65-75.［史基安,晋慧娟,薛莲花.长石砂岩中长石溶解作用发育机理及其影响因素分析［J］.沉积学报,1994,12(3):65-75.］
［14］Huang Sijing,Huang Keke,Feng Wenli,et al.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［J］.Geochimica,2009,38(5):498-506.［黄思静,黄可可,冯文立,等.成岩过程中的长石、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河川西凹陷三叠系须家河组的研究［J］.地球化学,2009,38(5):498-506.］
［15］Zhou Xingui,Zhang Linyan,Fan Kun.Characteristics and distribution of tectonic fractures in Chang 61 low-permeable reservoir in Wuqi area in Ordos basin［J］.Journal of Jilin University:Earth Science Edition,2008,31(1):43-49.［周新桂,张林炎,范昆.吴旗探区长61 储层构造裂缝特征及分布规律［J］.吉林大学学报:自然科学版,2008,31(1):43-49.］
［16］Li Yanxia,Liu Hongjun,Yuan Dongshan,et al.Effect of oil charging on reservoir′s diagenetic mineral evolution［J］.Oil & Gas Geology,2003,24(3):274-280.［李艳霞,刘洪军,袁东山,等.石油充注对储层成岩矿物演化的影响［J］.石油与天然气地质,2003,24(3):274-280.］
［17］Zhang Rui,Wang Qi,Yao Jingli,et al.Diagenetic characteristics and pore evolution from high quality reservoirs of Yanchang Formation in the middle of Ordos basin［J］.Natural Gas Geoscience,2010,21(6):891-896.［张瑞,王琪,姚泾利,等.鄂尔多斯盆地延长世湖盆中部长6 段储层成岩特征［J］.天然气地球科学,2010,21(6):890-896.
［18］Zheng Junmao,Pang Ming.Study on Clastic Diagenesis［M］.Wuhan:China University of Geosciences Press,1989:15-85.［郑浚茂,庞明.碎屑储集岩的成岩作用研究［M］.武汉:中国地质大学出版社,1989: 15-85.］
［19］Scholle P A,Schluger P.Aspects of Diagenesis
[M].SEPM Special 26.Tulsa:Society of Economic Paleontologists and Mineralogists,1979:55-79.
［20］Xie Zhengwen,Xie Yuan,Wang Jian,et al.The reservoir characteristics of Yanchang Group in Fuxian region,Ordos basin［J］.Petroleum Geology & Experiment,2005,27(12):575-582.［谢正温,谢渊,王剑,等.鄂尔多斯盆地富县地区延长组主要油层组储层特征［J］.石油实验地质,2005,27(12):575-582.］
［21］Liu Chiyang,Zhao Hongge,Wang Feng,et al.Attibutes of the Mesozoic structure on the west margin of Ordos basin［J］.Acta Geologica Sinica,2005,79(6):737-747.［刘池洋,赵红格,王锋,等.鄂尔多斯盆地西缘(部)中生代构造属性［J］.地质学报,2005,79(6):737-747.］
［22］Wang Qi,Shi Ji′an,Wang Duoyun,et al.Characteristics of diagenetic evolution of Chang2 sandstones (upper Triassic) in the western Ordos basin［J］.Natural Gas Geoscience,2005,16 (3):261-268.［王琪,史基安,王多云,等.鄂尔多斯盆地西部三叠系长2油层组砂岩成岩演化特征［J］.天然气地球科学,2005,16(3):261-268.］
［23］Sneider R M,King H R.Integrated rock-log calibration in the Elmworth Field-Alberta,Canada:Reservoir rock detection and characterization part I
[C]//Masters J A.Elmworth,Case Study of a Deep Basin Gas Field.Tusla:AAPG,1984:205-214.
［24］Beard D C,Weyl P K.Influence of texture on porosity and permeability of unsolidated sand［J］.AAPG Bulletin,1973,57(2):349-369.
［25］Scherer M.Parameters influencing porosity in sandstones:A model for sandstone porosity predication［J］.AAPG Bulletin,1987,71(5):485-491.
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