鄂尔多斯盆地巴汗淖地区奥陶系马家沟组马五6段碳酸盐岩成岩作用地球化学特征
Carbonate geochemical characteristics of the ordovician Ma56th member of Majiagou Formation from Bahannao area, Ordos Basin
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摘要: 巴汗淖地区马五6段是近年来鄂尔多斯盆地北部奥陶系海相油气勘探关注的新层段.采用ICP-AES离子体质谱地球化学测试与成岩演化相结合的研究方法,探讨分析了巴汗淖地区马五6段风化壳型碳酸盐岩储层的主要成岩作用类型.研究结果表明,研究区碳酸盐岩的SiO2、K2O、TiO2、P2O5、Mn、Na含量略低,Al2O3、Fe的含量高,Eu、Ce显负异常,说明研究区地层经历埋藏成岩作用,且后期地层抬升到地表遭受了大气淡水的淋滤;其中,白云岩的MgO值及Na的含量与灰岩的含量相比略高,这主要是埋藏白云石化作用的结果.进一步研究表明,埋藏溶解作用、埋藏白云石化作用以及表生期大气淡水淋滤作用使得次生孔隙发育,有利于油气的储集.Abstract: In recent years, the Ordovician Ma56th member of Majiagou Formation from Bahannao area (northern of Ordos Basin) has becomes a new stage of oil and gas exploration concern. This study combined ICP-AES ion mass spectrumetry geochemical test with diagenetic evolution, to investigate discuss the main diagenesis types of the weathering crust carbonate reservoir of Ma56th member in Bahannao area. The contents of SiO2, K2O, TiO2, P2O5, Mn, Na from carbonate rocks were slightly lower but contents of Al2O3 and Fe were higher. The contents of Eu and Ce show negative anomaly. The geochemical characteristics indicate that strata from Bahannao area experienced burial diageneses and suffered atmospheric fresh water leaching during the subsequent late diagenesis dut to the region uplift. The MgO and Na values of dolomite was higher than those of limestone as a result of buried dolomitization. Further study showed that burial dissolution, burial dolomitization and atmospheric fresh water leaching influenced the development of secondary pore which is advantageous to the oil and gas reservoir.
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Key words:
- major element /
- trace element /
- rare earth elements /
- diagenesis.
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[1] 李文厚, 陈强, 李智超, 等. 鄂尔多斯地区早古生代岩相古地理[J]. 古地理学报, 2012: 14(1): 85-99. LI W H, CHEN Q, LI Z C, et al. Lithofacies palaeogeography of the Early Paleozoic in Ordos area[J].Journal of Palaeogeography, 2012: 14(1): 85-99(in Chinese).
[2] 何江, 冯春强, 马岚. 风化壳古岩溶型碳酸盐岩储层成岩作用与成岩相[J]. 石油实验地质, 2015, 37(1): 9-16. HE J, FENG C Q, MA L, et al. Diagenesis and diagenetic facies of crust-weathered ancient karst carbonate reservoirs[J].Petroleum Geology & Experiment, 2015, 37(1): 9-16(in Chinese).
[3] 王起琮, 赵淑萍, 魏钦廉, 等. 鄂尔多斯盆地中奥陶统马家沟组海相碳酸盐岩储集层特征[J]. 古地理学报, 2015, 14(2): 229-242. WANG Q C, ZHAO S P, WEI Q L, et al. Marine carbonate reservoir characteristics of the Middle Ordovician Majiagou Formation in Ordos Basin[J]. Journal of Palaeogeography, 2015, 14(2): 229-242(in Chinese).
[4] 郑剑锋, 沈安江, 刘永福, 等. 多参数综合识别塔里木盆地下古生界白云岩成因[J].石油学报, 2012, 33(增刊 2): 145-153. ZHENG J F, SHEN A J, LIU Y F, et al. Multi-parameter comprehensive identification of the genesis of Lower Paleozoic dolomite in Tarim Basin, China[J]. Acta Petrolei Sinica, 2012 , 33(2): 145-153(in Chinese).
[5] TUCKER M E, WIRGHT V P. Carbonate sedimentolog[M]. Oxford University press: Blackwell Scientific Publications.1990: 482. [6] 赵卫卫, 王宝清. 鄂尔多斯盆地苏里格地区奥陶系马家沟组马五段白云岩地球化学特征[J].地球学报, 2011, 32(6): 681-690. ZHAO W W, WANG B Q. Geochemical characteristics of dolomite from 5th member of the Ordovician Majiagou Formation in Sulige Area, Ordos Basin[J].Acta Geoscientica Sinica, 2011, 32(6): 681-690(in Chinese).
[7] 苏中堂, 陈洪德, 徐粉燕, 等. 鄂尔多斯盆地马家沟组白云岩地球化学特征及白云岩化机制分析[J].岩石学报, 2011, 27(8): 2230-2238. SU Z T, CHEN H D, XU F Y, et al. Geochemistry and dolomitization mechanism of Majiagou dolomites in Ordovician, Ordos, China. Acta Petrologica Sinica, 2011, 27(8): 2230-2238(in Chinese).
[8] 付金华, 王宝清, 孙六一, 等. 鄂尔多斯盆地苏里格地区奥陶系马家沟组白云石化[J].石油实验地质, 2011, 33(3): 266-273. FU J H, WANG B Q, SUN L Y, et al. Dolomitization of Ordovician Majiagou Formation in Sulige region, Ordos Basin[J]. Petroleum Geology & Experiment, 2011, 33(3): 266-273(in Chinese).
[9] 刘显凤, 蔡忠贤, 云露, 等. 塔河油田岩溶作用元素地球化学的特征响应[J].石油实验地质, 2009, 31(3): 270-274. LIU X F, CAI Z X, YUN L, et al. Element geochemistry characteristic response for karstification in the Tahe Oilfield[J]. Petroleum Geology & Experiment, 2009, 31(3): 270-274(in Chinese).
[10] 张金亮, 张鑫. 塔里木盆地志留系古海洋沉积环境的元素地球化学特征[J].中国海洋大学学报, 2006, 36(2): 200-208. ZHANG J L, ZHANG X. The element geochemical features of ancient Oceanic sedimentary environmens in the Silurian Period in the Tarim Basin[J].Periodical of Ocean University of China, 2006, 36(2): 200-208(in Chinese).
[11] 史忠生, 陈开运, 何胡军, 等. 锶同位素在沉积环境分析方面的应用[J].石油与天然气地质, 2003, 24(2): 187-190. SHI ZH S, CHEN K Y, HE H J, et al. Application of Sr isotope to sedimentary ironment analysis[J].Oil and Gas Geology, 2003, 24(2): 187-190(in Chinese).
[12] 高长林, 黄泽光, 张玉箴. 周口白垩系砂泥岩的化学特征及其构造学意义[J].石油与天然气地质, 2005, 26(2): 237-241. GAO C L, HUANG Z G, ZHANG Y Z. Geochemical characteristics of Cretaceous sandstone-mudstone and its importance to tectonics in Zhoukou Basin[J].Oil and Gas Geology, 2005, 26(2): 237-241(in Chinese).
[13] 李双应, 金福全, 王道轩. 碳酸盐岩成岩作用的微量元素地球化学特征[J].石油实验地质, 1995, 17(1): 55-62. LI S Y, JIN F Q, WANG D X. Geochemical characteristics of carbonate rock diagenesis[J]. Petroleum Geology & Experiment, 1995, 17(1): 55-62(in Chinese).
[14] 侯方浩, 方少仙, 董兆雄. 鄂尔多斯盆地中奥陶统马家沟组沉积环境与岩相发育特征[J].沉积学报, 2003, 21(1): 106-112. HOU F H, FANG S X, DONG Z X. The developmental of sedimentary environments and lithofacies of middle Ordovician Majiagou formation in Ordos Basin[J].2003, 21(1): 106-112(in Chinese).
[15] 赵伦山, 张本仁. 地球化学[M]. 北京: 地质出版社, 1987. ZHAO L S, ZHANG B R.Geochemistry[M]. Beijing: Geological Publishing House, 1987(in Chinese). [16] 王宝清, 张金亮. 山西省兴县奥陶系古岩溶地球化学特征[J].地质论评, 1996, 42: 62-69. WANG B Q, ZHANG J L.Geochemical characteristics of the Ordovician Paleokarst in Xingxian, Shanxi[J]. Geological Review, 1996 , 42(3): 62-69(in Chinese).
[17] 姚泾利, 王保全, 王一, 等. 鄂尔多斯盆地下奥陶统马家沟组马五段白云岩的地球化学特征[J]. 沉积学报, 2009, 27(3): 381-389. YAO J L, WANG B Q, WANG Y, et al. Geochemical characteristics of dolomites in Lower Ordovician Majiagou Formation, Ordos Basin[J]. Acta Sedimentologica Sinica, 2009, 27(3): 381-389(in Chinese).
[18] SUN S S, MC DONOUGH W F. Chemical and isotopic systematics of oceanic basalts: Implications for mantle composition and processes[J].Geological Society, London, Special Publications 1989, 42(1): 313-345. [19] Morse J W, Mackenzie F T.Geochemistry of sedimentary carbonates[M]. The Netherlands: Elsevier, 1990. [20] 赵俊兴, 陈洪德, 张锦泉, 等. 鄂尔多斯盆地中部马五段白云岩成因机理研究[J].石油学报, 2005, 26(5): 38-41. ZHAO J X, CHEN H D, ZHANG J Q, et al. Genesis of dolomie in the fifth member of Majiagou formation in the Middle Ordos Basin[J]. Acta Petrolei Sinica, 2005, 26(5): 38-41(in Chinese).
[21] WARREN J. Dolomite: occurrence, evolution and economically important associations[J]. Earth-Science Reviews, 2000, 52(1-3): 1-81. [22] 李军, 桑树勋, 林会喜. 渤海湾盆地石炭二叠系稀土元素特征及地质意义[J].沉积学报. 2007, 25(4): 589-596. LI J, SANG S X, LIN H X. REE characteristics and its geological significance of the permo-carboniferous in Bohaiwan Basin[J]. Acta Sedimentologica Sinica, 2007, 25(4): 589-596(in Chinese).
[23] SMEDLEY P L. The geochemistry of rare earth elements in ground water from the Carnmenellis area, southwest England [J].Geochimica et Cosmo Chimica Acta, 1991, 55(10): 2767-2779. [24] SHOLKOVITZ E R, CHURCH T M, ARIMOTO R. Rare earth element composition of precipitation, precipitation particles, and aerosols[J].Journal of Geophysical Research, 1993, 98(D11): 20587. [25] NESBITT H W. Mobility and fractionation of rare earth elements during weathering of a granodiorite[J].Nature, 1979, 279: 206-210. [26] 胡文瑄, 陈琪, 王小林, 等.白云岩储层形成演化过程中不同流体作用的稀土元素判别模式[J]. 石油与天然气地质, 2010, 31(6): 810-818. HU W X, CHEN Q, WANG X L, et al. REE models for discrin ination of fluids in the formation and evolution of dolomite reservoirs[J].Oil and Gas Geology, 2010, 31(6): 810-818(in Chinese).
[27] 王伟力, 孙莹. 鄂尔多斯盆地东部马家沟组岩盐元素地球化学特征及成因分析[J].科技导报, 2013, 31(17): 51-55. WANG W L, SUN Y. Elemmental geochemical characteristics and gause of formation analysis of the rocks salt in Majiagou formation, East part of Ordos Basin[J].Science and Technology Review, 2013, 31(17): 51-55(in Chinese).
[28] SHIELDS G, STILLE P. Diagenetic constrains on the use of cerium anomalies as paleoseawater redox proxies: An isotopic and REE study of Cambrian phosphorites[J].Chemical Geology, 2001, 175: 29-48. -
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