收稿日期: 2015-04-16
修回日期: 2015-05-19
网络出版日期: 2016-01-10
基金资助
国家科技重大专项“近海大中型油气田形成条件与分布—渤海海域大中型油气田地质特征”(编号:2011ZX05023-006-002);中国海洋石油总公司勘探部生产科研项目联合资助.
Dissolution mechanism analysis of Ordovician carbonates under burial environment of Bozhong Sag,Bohai Sea area
Received date: 2015-04-16
Revised date: 2015-05-19
Online published: 2016-01-10
渤中凹陷奥陶系碳酸盐岩具有明显深埋环境下溶蚀特征,溶蚀形成的次生孔隙有效改善了储层物性。通过岩石薄片鉴定、扫描电镜观察、阴极发光观察、流体包裹体分析及天然气碳同位素分析等手段对研究区溶蚀成因进行了系统分析。结果显示:研究区奥陶系储层以灰岩、白云岩及灰质白云岩为主,储集空间以多期溶蚀形成的次生孔隙及裂缝为主。该储层经历了正常海水、大气淡水及深埋藏3个成岩环境,其成岩作用则以胶结及溶蚀作用交互为特征。深埋藏环境下碳酸盐矿物溶蚀主要受控于沿深大断裂注入的幔源CO2、H2S及硫酸盐热化学反应形成的酸性流体和晚期成藏过程中有机质成熟产生的有机酸和酸性气体。综合分析认为由于更易受到深大断裂及表生溶蚀作用影响,研究区东南侧高部位是奥陶系碳酸盐岩优质储层有利发育区。
赵国祥,王清斌,杨波,王晓刚,白冰,万琳 . 渤中凹陷奥陶系深埋环境下碳酸盐岩溶蚀成因分析[J]. 天然气地球科学, 2016 , 27(1) : 111 -120 . DOI: 10.11764/j.issn.1672-1926.2016.01.0111
Obvious corrosion characteristics under deep burial environment can be found in the Ordovician carbonate rocks of Bozhong Sag,and secondary pores which were caused by corrosion improve the reservoir property.Systematic analysis of dissolution mechanism in research area were studied using normal thin-sections,cast thin-sections,scanning electron microscope,cathodoluminescence analysis,fluid inclusion analysis and natural gas carbon isotope analysis.The results show the Ordovician reservoir in the study area was dominated by limestone,dolomite and calcite dolomite,the secondary pores formed by multiphase corrosion and fractures are mainly reservoir space.The reservoir has experienced three diagenetic environments including normal sea water,atmospheric fresh water and deep burial environment.The diagenesis is characterized by interaction between cementation and dissolution.Carbonate mineral dissolution in the deep burial environment are mainly controlled by mantle sourced CO2,H2S injected along the deep fault,acidic fluid formed by sulfate thermochemical reaction and organic acids and acidic gas produced in the process of late hydrocarbon accumulation.Comprehensive analysis shows that the southeast side of the study area where is more susceptible to deep fracture and surface dissolution effect is Ordovician carbonate reservoir favorable development area.
[1]Ma Yongsheng.Oil and gas resources,exploration important technology problems and counter measures of marine carbonates in China[J].Marine Oil and Gas Geology,2000,5(1/2):15.[马永生.中国海相碳酸盐岩油气资源、勘探重大科技问题及对策[J].海相油气地质,2000,5(1/2):15.]
[2]Zhao Zongju,Fan Guozhang,Wu Xingning,et al.Reservoir types,exploration domains and exploration strategy of marine carbonates in China[J].Marine Oil and Gas Geology,2007,12(1):1-11.[赵宗举,范国章,吴兴宁,等.中国海相碳酸盐岩的储层类型、勘探领域及勘探战略[J].海相油气地质,2007,12(1):1-11.]
[3]Wang Zecheng,Zhao Wenzhi,Hu Suyun,et al.Reservoir types and distribution characteristics of large marine carbonate oil and gas fields in China[J].Oil & Gas Geology,2013,34(2):153-160.[汪泽成,赵文智,胡素云,等.我国海相碳酸盐岩大油气田油气藏类型及分布特征[J].石油与天然气地质,2013,34(2):153-160.]
[4]Qu Jian.The Single Largest Marine Gas Reservoir Has Been Found by CNPC,Proven Geological Reserves of 440.3 Billion Cubic Meters[EB/OL].[2014-02-11].http://digitalpaper.stdaily.com/.[瞿剑.中石油发现国内最大单体海相整装气藏,探明地质储量4403亿立方米[EB/OL].[2014-02-11].http://digitalpaper.stdaily.com/.]
[5]Wang Zhaoyun,Cheng Keming,Yang Chiyin,et al.Early Palaeozoic primary oil of Kongxi buried hill in Huanghua Depression,Huabei,China[J].Petroleum Exploration and Development,1997,24(3):1-4,96.[王兆云,程克明,杨池银,等.黄骅凹陷孔西潜山带下古生界原生油[J].石油勘探与开发,1997,24(3):1-4,96.]
[6]Wang Yongjun,Zhang Baomin,Wang Zhengjun,et al.Geological characteristics of Ordovician buried hill and main factors of oil /gas accumulation in Nanpu Sag,Bohai Bay Basin,China[J].Natural Gas Geoscience,2012,23(1):51-59.[王拥军,张宝民,王政军,等.渤海湾盆地南堡凹陷奥陶系潜山油气地质特征与成藏主控因[J].天然气地球科学,2012,23(1):51-59.]
[7]Yu Xuemin,Su Junqing,Wang Zhensheng.Basic geological characteristics of Qianmiqiao buried hill oil/gas reservoir[J].Petroleum Exploration and Development,1999,26(6):7-9,17.[于学敏,苏俊清,王振生.千米桥潜山油气藏基本地质特征[J].石油勘探与开发,1999,26(6):7-9,17.]
[8]Zhu Guangyou,Zhang Shuichang,Liang Yingbo.Formation mechanism and distribution prediction of high-quality marine reservoir in deeper Sichuan Basin[J].Petroleum Exploration and Development,2006,33(2):161-166.[朱光有,张水昌,梁英波.四川盆地深部海相优质储集层的形成机理及其分布预测[J].石油勘探与开发,2006,33(2):161-166.]
[9]Huang Sijing,Gong Yechao,Huang Keke,et al.The influence of burial history on carbonate dissolution and precipitation:A case study from Feixianguan Formation of Triassic,NE Sichuan and Ordovician carbonate of northern Tarim Basin[J].Advances in Earth Science,2010,25(4):381-390.[黄思静,龚业超,黄可可,等.埋藏历史对碳酸盐溶解—沉淀的影响——以四川盆地东北部三叠系飞仙关组和塔里木盆地北部奥陶系为例[J].地球科学进展,2010,25(4):381-390.]
[10]Lonnee J,Machel H G.Pervasive dolomitization with subsequent hydrothermal alteration in the Clarke Lake Gasfield,Middle Devonian Slave Point Formation,British Columbia,Canada[J].AAPG Bulletin,2006,90(1):1739-1761.
[11]Zhu Guangyou,Zhang Shuichang,Liang Yingbo,et al.Dissolution and alteration of the deep carbonate reservoirs by TSR:An important type of deep-buried high-quality carbonate reservoirs in Sichuan Basin[J].Acta Petrologica Sinica,2006,22(8):2182-2194.[朱光有,张水昌,梁英波,等.TSR对深部碳酸盐岩储层的溶蚀改造—四川盆地深部碳酸盐岩优质储层形成的重要方式[J].岩石学报,2006,22(8):2182-2194.]
[12]Zhu Weilin,Mi Lijun,Gong Zaisheng,et al.Hydrocarbon Accumulation and Exploration of Bohai Sea Area[M].Beijing:Science Press,2009.[朱伟林,米立军,龚再升,等.渤海海域油气成藏与勘探[M].北京:科学出版社,2009.]
[13]Xia Qinglong,Tian Lixin,Zhou Xinhuai,et al.The Structure Formation,Evolution and Deformation Mechanism of Bohai Sea Area[M].Beijing:Petroleum Industry Press,2012.[夏庆龙,田立新,周心怀,等.渤海海域构造形成演化与变形机制[M].北京:石油工业出版社,2012.]
[14]Peng Chuansheng,Lin Huixi,Liu Hua,et al.Tectonic evolution of the Bohai Bay Basin and the Palaeozoic original oil and gas reservoirs[J].Geological Journal of China Universities,2008,14(2):206-216.[彭传圣,林会喜,刘华,等.渤海湾盆地构造演化与古生界原生油气成藏[J].高校地质学报,2008,14(2):206-216.]
[15]Li Desheng.Geology and structural characteristics of Bohai Bay,China[J].Acta Petrolei Sinica,1980,1(1):6-20.[李德生.渤海湾含油气盆地的地质和构造特征[J].石油学报,1980,1(1):6-20.]
[16]Wan Guimei,Tang Liangjie,Zhou Xinhuai,et al.Zonation of structural pattern in the Bozhong Depression and its adjacent area[J].Marine Geology & Quaternary Geology,2009,29(2):67-74.[万桂梅,汤良杰,周心怀,等.渤中凹陷及邻区构造分带变形特征[J].海洋地质与第四纪地质,2009,29(2):67-74.]
[17]The Exploration Professional Standards Committee of CNOOC.Q/HS 1027-2007 Reservoir Cap Rock Quantitative Evaluation Specification[S].CNOOC,2008.[中国海洋石油总公司勘探专业标准委员会.Q/HS 1027-2007 储盖层定量评价规范[S].中国海洋石油总公司,2008.]
[18]Morse J W.Formation and diagenesis of carbonate sediments[J].Treatise on Geochemistry,2003,7:67-85.
[19]Ehrenberg S N,Eberli G P,Keramati M,et al.Porosity-permeability relationships in interlayered limestone-dolostone reservoirs[J].AAPG Bulletin,2006,90(1):91-114.
[20]Wang Yinghua.Carbonate diagenesis and porosity evolution[J].Acta Sedimentologica Sinica,1992,10(3):85-95.[王英华.碳酸盐岩成岩作用与孔隙演化[J].沉积学报,1992,10(3):85-95.]
[21]Wang Huanhuan,Zhu Guangyou,Xue Haitao,et al.Formation and controlling factors of effective weathered crust carbonate reservoirs:Taking the Yingmaili-Yaha area of Tarim Basin as an example[J].Natural Gas Geoscience,2009,20(2):182-191.[王欢欢,朱光有,薛海涛,等.碳酸盐岩风化壳型有效储层的形成与控制因素研究——以塔里木盆地英买力—牙哈地区为例[J].天然气地球科学,2009,20(2):182-191.]
[22]Wang Qi,Shi Ji’an,Chen Guojun,et al.Characteristics of diagenetic environments of carbonate rocks in western Tarim Basin and their controls on the reservoir property[J].Acta Sedimentologica Sinica,2001,19(4):548-555.[王琪,史基安,陈国俊,等.塔里木盆地西部碳酸盐岩成岩环境特征及其对储层物性的控制作用[J].沉积学报,2001,19(4):548-555.]
[23]Zhao Yanyan,Zheng Yongfei.Diagenesis of carbonate sediments[J].Acta Petrologica Sinica,2010,27(2):501-519.[赵彦彦,郑永飞.碳酸盐沉积物的成岩作用[J].岩石学报,2010,27(2):501-519.]
[24]Wierzbicki R,Dravis J J,Al-Amas I,et al.Burial dolomitization and dissolution of Upper Jurassic Abenaki platform carbonate,deep Panuke reservoir,Nova Scotia,Canada[J].AAPG Bulletin,2006,90(11):1843-1861.
[25]Heydary E,Moore C H.Buried diagenesis and thermochemical sulfate reduction,Smackover Formation,southeastern Mississippi salt Basin[J].Geology,1989,17(12):1080-1084 .
[26]Huang Sijing,Xiao Linping,Yang Junjie,et al.Experimental simulation of dolomite dissolution under burial diagenesis conditions and thermogynamic interpretation[J].Chinese Journal of Geochemistry,2000,19(1):58-64.
[27]Huang Sijing.Carbonate Diagenesis[M].Beijing:Geology Press,2010.[黄思静.碳酸盐岩的成岩作用[M].北京:地质出版社,2010.]
[28]Dai Jingxing,Wen Hengfan,Song Yan.Nature gas of the mantle origin in the Wudalianchi[J].Experimental Petroleum geology,1992,14(2):200-203.[戴金星,文亨范,宋岩.五大连池地慢成因的天然气[J].石油实验地质,1992,14(2):200-203.]
[29]Dai Jingxin,Qi Houfa,Hao Shisheng.Natural Gas Geology Overview[M].Beijing:Petroleum Industry press,1989.[戴金星,戚厚发,郝石生.天然气地质学概论[M].北京:石油工业出版社,1989.]
[30]Zhu Dongya,Meng Qinqiang,Jin Zhijun,et al.Thermodynamic analysis for carbonate dissolution-filling under influence of CO2-rich deep fluid[J].Chinese Journal of Geology,2012,47(1):187-201.[朱东亚,孟庆强,金之钧,等.富CO2深部流体对碳酸盐岩的溶蚀-充填作用的热力学分析[J].地质科学,2012,47(1):187-201.]
[31]Pokrovsky,Oleg S,Golubev,et al.Calcite,dolomite and magnesite dissolution kinetics in aqueous solutionsat acid to circumneutral pH,25 to 150°C and 1 to 55 atm pCO2 :New constraintson CO2 sequestration in sedimentary basins[J].Chemical Geology,2009,265(s1-2):20-32.
[32]Yang Junjie,Huang Sijing,Zhang Wenzheng,et al.Experimental simulation of dissolution for carbonate with different composition under the conditions from epigenesis to burial diagenesis environment[J].Acta Sedimentologica Sinica,1995,13(4):49-54.[杨俊杰,黄思静,张文正,等.表生和埋藏成岩作用的温压条件下不同组成碳酸盐岩溶蚀成岩过程的实验模拟[J].沉积学报,1995,13(4):49-54.]
[33]Ye Xianren,Tao Mingxin,Yu Chuan’ao,et al.Helium and neon isotopic compositions in the Ophiolites from the Yarlung Zangbu River,southwestern China:The information from deep mantle[J].Science in China:Series D,2007,37(5):573-583.[叶先仁,陶明信,余传螯,等.用分段加热法测定的雅鲁藏布江蛇绿岩的He和Ne同位素组成:来自深部地幔的信息[J].中国科学:D辑,2007,37(5):573-583.]
[34]Zheng Fengyun,Huang Shengbo,Li Zaohong,et al.Origin and petroleum geologic significance of hydrogen sulfide in the reservoir of deep buried-hills,Bobai Bay Basin[J].Petroleum Exploration and Development,2004,31(4):19-21.[郑凤云,黄盛波,李早红,等.渤海湾盆地深层潜山储集层中H2S成因及其地质意义[J].石油勘探与开发,2004,31(4):19-21.]
[35]Tian Nan,Niu Hongbin,Ma Tuanxiao,et al.Hydrogen sulfide genesis in BZ25-1/S Oilfields,Bozhong Depression[J].Natural Gas Geoscience,2012,23(3):438-442.[田楠,牛洪彬,马团校,等.渤中坳陷渤中25-1/S油田硫化氢成因研究[J].天然气地球科学,2012,23(3):438-442.]
[36]Machel H G.Bacterial and thermochemical sulfate reduction in diagenetic settings-old and new insights[J].Sedinentary Geology,2001,140(1):143-175.
[37]Machel H G.Gas souring by thermochemical sulfate reduction at 140℃:Discussion[J].AAPG Bulletin,1998,81(5):1870-1873.
[38]Du Chunguo,Hao Fang,Zou Huayao,et al.Effect of thermochemical sulfate reduction upon carbonate gas reservoir:An example from the northeast Sichuan Basin[J].Acta Geological Sinica,2007,81(1):119-126.[杜春国,郝芳,邹华耀,等.热化学硫酸盐还原作用对碳酸盐岩气藏的化学改造——以川东北地区长兴组—飞仙关组气藏为例[J].地质学报,2007,81(1):119-126.]
[39]Ma Yongsheng,Guo Tonglou,Zhu Guangyou,et al.Experimental simulation evidence of sulfate dissolution modification of carbonate reservoir:A case from Feixinguan Formation,east Sichuan Basin[J].Chinese Science Bulletin,2007,52(supplement 1):136-141.[马永生,郭彤楼,朱光有,等.硫化氢对碳酸盐储层溶蚀改造作用的模拟实验证据——以川东飞仙关组为例[J].科学通报,2007,52(增刊Ⅰ):136-141.]
[40]Han Gehua,Qi Lixin,Li Zongjie,et al.Prediction of the Ordovician fractured-vuggy carbonate reservoirs in Tahe Oilfield[J].Oil & Gas Geology,2006,27(6):860-870,878.[韩革华,漆立新,李宗杰,等.塔河油田奥陶系碳酸盐岩缝洞型储层预测技术[J].石油与天然气地质,2006,27(6):860-870,878.]
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