苏里格气田东区马五段储层特征及控制因素
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摘要
下奥陶统马家沟组马五_(1-5)段是苏里格气田东区主要产层段,其勘探潜力巨大。基于岩心观察、铸体薄片及分析化验等资料,对马五段进行储层特征及控制因素分析。研究表明,苏里格东区在马五_5期为局限台地相带的潮坪亚相沉积。马五_(1-4)为含膏云坪亚相,马五5为颗粒滩相;发育含膏细-粉晶白云岩和中-粗晶白云岩。苏里格气田东区马五_(1-5)段储集空间包括孔隙和裂缝2大类,其中孔隙主要为溶蚀孔、膏模孔、晶间孔、晶间溶孔和裂缝包括溶蚀缝、微裂缝和构造缝等。储层发育和分布主要受控于:沉积环境决定了多类型储层发育;马五_(1-4)层段准同生白云石化和渗透回流白云石化及马五_5段埋藏白云石化作用是碳酸盐岩储层发育的决定条件,白云石化作用改善了储集性能;苏里格气田马五_(1-5)层段碳酸盐岩储层经历了不同阶段溶蚀作用(同生、表生、埋藏)而形成有利的溶孔、溶缝储层,提高了储层储集性能。
Ma 5 member of the lower Ordovician Majiagou Formation are main production layers with great exploration potential in the eastern Sulige Gasfield of Ordos Basin. Based on core observation,thin section and experimental analysis material,the reservoir characteristics and their controlling factors are analyzed. The results show that Ma 5 member of the lower Ordovician Majiagou Formation are deposited in tidal flat facies of restricted platform and dolostones are well developed and can be divided into two types: gypsodolomite and mid-macrocrystalline dolomite in the eastern Sulige gasfield. Reservoir space of Ma 5 member can be divided into two types,including dissolved pore,gypsum mould pore,intercrystalline pore,intercrystalline solution pore,dissolution fracture and microfracture etc in the eastern Sulige gasfield. The development and distribution of reservoirs is mainly controlled by the following three aspects: Microfacies are the basis for controlling the development and distribution of different types of reservoirs. Dolomitization of Penecontemporaneous and seepage-reflux in the Ma 5_(1-4) and burial dolomitization of Ma 5_5 are prerequisites to development of carbonate reservoir,which improve reservoir performance. The carbonate reservoir has gone through several different stages of dissolution,such as syngenetic,supergenetic and burial dissolution,which caused formation of the dissoluted fissures reservoir and improved accumulating space.
Ma 5 member of the lower Ordovician Majiagou Formation are main production layers with great exploration potential in the eastern Sulige Gasfield of Ordos Basin. Based on core observation,thin section and experimental analysis material,the reservoir characteristics and their controlling factors are analyzed. The results show that Ma 5 member of the lower Ordovician Majiagou Formation are deposited in tidal flat facies of restricted platform and dolostones are well developed and can be divided into two types: gypsodolomite and mid-macrocrystalline dolomite in the eastern Sulige gasfield. Reservoir space of Ma 5 member can be divided into two types,including dissolved pore,gypsum mould pore,intercrystalline pore,intercrystalline solution pore,dissolution fracture and microfracture etc in the eastern Sulige gasfield. The development and distribution of reservoirs is mainly controlled by the following three aspects: Microfacies are the basis for controlling the development and distribution of different types of reservoirs. Dolomitization of Penecontemporaneous and seepage-reflux in the Ma 5_(1-4) and burial dolomitization of Ma 5_5 are prerequisites to development of carbonate reservoir,which improve reservoir performance. The carbonate reservoir has gone through several different stages of dissolution,such as syngenetic,supergenetic and burial dissolution,which caused formation of the dissoluted fissures reservoir and improved accumulating space.
引文
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[14]魏丽,王震亮,冯强汉,等.靖边气田北部奥陶系马五1亚段碳酸盐岩成岩作用及其孔隙结构特征[J].天然气地球科学,2015,26(12):2234-2244.WEI Li,WANG Zhen-liang,FENG Qiang-han,et al. Diagenesis in carbonate reservoir and pore structure characteristic from the Ordovician Ma51sub-member reservoir in the northern Jingbian Gasfield[J]. Natural Gas Geoscience,2015,26(12):2234-2244.
[15] Graham R D,Langhorne B,Smith J R. Structurally controlled hydrothermal dolomite reservoir facies:an overview[J]. American Association of Petrolem Geologists Bulletin,2006,90(11):1641-1690.
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[17] Kenward P A. Ordered low-temperature dolomite mediated by carboxyl-group density of microbial cell walls[J]. American Association of Petrolem Geologists Bulletin,2013,97(11):2113-2125.
[18] Bontognali T R R,Vasconcgelos C,Warthmann R J,et al. Dolomite Formation within microbial mats in the coastal sabkha of Abu Dhabi(United Arab Emirates)[J]. Sedimentology,2010,57(3):824-844.
[19]强娟,曹红霞,张宪旭,等.鄂尔多斯盆地中东部马家沟组白云岩地球化学特征研究[J].西安科技大学学报,2015,35(3):344-349.QIANG Juan,CAO Hong-xia,ZHANG Xian-xu,et al.Majiagou Formation in the central dolomite geochemistry characteristics and eastern part of Ordos Basin[J]. Journal of Xi’an University of Science and Technology,2015,35(3):344-349.
[20]包洪平,杨帆,蔡郑红,等.鄂尔多斯盆地奥陶系白云岩成因及白云岩储层发育特征[J].天然气工业,2017,37(1):32-45.BAO Hong-ping,YANG Fan,CAI Zheng-hong,et al. Origin and reservoir characteristics of Ordovician dolostones in the Ordos Basin[J]. Natural Gas Industry,2017,37(1):32-45.
[21]赵文智,沈安江,乔占峰,等.白云岩成因类型、识别特征及储集空间成因[J].石油勘探与开发,2018,45(6):923-935.ZHAO Wen-zhi,SHEN An-jiang,QIAO Zhan-feng,et al. Genetic types and distinguished characteristics of dolomite and the origin of dolomite reservoirs[J]. Petroleum Exploration and Development,2018,45(6):923-935.
[22]曹红霞,吴海燕,尚婷,等.延安地区马家沟组风化壳型储层孔隙结构及分类评价[J].西安科技大学学报,2018,38(3):426-434.CAO Hong-xia,WU Hai-yan,SHANG Ting,et al. Pore structure and classification evaluation of the weathered crust type reservoir of the Majiagou Formation in Yan’an Area[J]. Journal of Xi’an University of Science and Technology,2018,38(3):426-434.
[23]何江,冯春强,马岚,等.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):8-16.HE Jiang,FENG Chun-qiang,MA Lan,et al. Diagenesis and diagenetic facies of crust-weathered ancient Karst carbonate reservoirs[J]. Petroleum Geology&Experiment,2015; 37(1):8-16.
[24] Omid,Ghiasi-Freez,Javad,et al. Two intelligent pattern recognition models for automatic identification of textural and pore space characteristics of the carbonate reservoir rocks using thin section images[J]. Journal of Natural Gas Science and Engineering,2016(1):944-955.
[2]张道锋,刘新社,高星,等.鄂尔多斯盆地西部奥陶系海相碳酸盐岩地质特征与成藏模式研究[J].天然气地球科学,2016; 27(1):92-101.ZHANG Dao-feng,LIU Xin-she,GAO Xing,et al. Geological characteristics and accumulation model of Ordovician marine carbonate in western Ordos Basin[J].Natural Gas Geoscience,2016,27(1):92-101.
[3]李鑫.鄂尔多斯盆地东南部奥陶系烃源岩评价[J].西安科技大学学报,2015,35(1):56-62.LI Xin. Evaluation to Ordovician hydrocarbon source rocks in the southeast of the Ordos Basin[J]. Journal of Xi’an University of Science and Technology,2015,35(1):56-62
[4]付金华,白海峰,孙六一,等.鄂尔多斯盆地奥陶系碳酸盐岩储集体类型及特征[J].石油学报,2012; 33(A02):110-117.FU Jin-hua,BAI Hai-feng,SUN Liu-yi,et al. Types and characteristics of the Ordovician carbonate reservoirs in Ordos Basin[J]. Acta Petrolei Sinica,2012,33(A02):110-117.
[5]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,2012,14(2):229-242.WANG Qi-cong,ZHAO Shu-ping,WEI Qin-lian,et al.Marine carbonate reservoir characteristics of the Middle Ordovician Majiagou Formation in Ordos Basin[J].Journal of Palaeogeography,2012,14(2):229-242.
[6]靳程光,王起琼,刘佳玮,等.鄂尔多斯盆地奥陶系石灰岩岩相及地球化学特征[J].西安科技大学学报,2016,36(1):47-54.JIN Cheng-guang,WANG Qi-cong,LIU Jia-wei,et al.Lithofacies and geochemical characteristics of Ordovician limestone in Ordos Basin[J]. Journal of Xi’an University of Science and Technology,2016,36(1):47-54.
[7]冯晓伟,李浮萍,赵忠军,等.苏里格气田东区马五段4亚段1小层与5亚段白云岩储层对比研究[J].石油天然气学报,2014; 36(1):25-29.FENG Xiao-wei,LI Fu-ping,ZHAO Zhong-jun,et al. A comparative study on dolomite reservoirs in the East of Sulige Gasfield[J]. Journal of Oil and Gas Technology,2014; 36(1):25-295.
[8]张宁宁.苏里格中区T34-S470区块马五段储层特征研究[D].西安:西安石油大学,2015.ZHANG Ning-ning. Study on the reservoir characteristics of the Ma 5 member of block T43-S470 well area in Sulige middle area[D]. Xi’an:Xi’an Shiyou University,2015.
[9]蒋传杰,杜孝华,张浩,等.苏里格气田东区下奥陶统马五5亚段白云岩成因[J].新疆石油地质,2017,38(1):41-48.JIANG Chuan-jie,DU Xiao-hua,ZHANG Hao,et al.Genesis of dolomite in the Lower Ordovician Ma55Submember in eastern area of Sulige Gasfield[J]. Xinjiang Petroleum Geology,2017,38(1):41-48.
[10]陈洪德,胡思涵,陈安清,等.鄂尔多斯盆地中央古隆起东侧非岩溶白云岩储层成因[J].天然气工业,2013,33(10):18-24.CHEN Hong-de,HU Si-han,CHEN An-qing,et al. Genesis of non-karst dolomite reservoirs in the eastern central paleo-uplift in the Ordos Basin[J]. Natural Gas Industry,2013,33(10):18-24.
[11]沈安江,赵文智,胡安平,等.海相碳酸盐岩储集层发育主控因素[J].石油勘探与开发,2015,42(5):545-554.SHEN An-jiang,ZHAO Wen-zhi,HU An-ping,et al.Major factors controlling the development of marine carbonate reservoirs[J]. Petroleum Exploration and Development,2015,42(5):545-554.
[12]赵文智,沈安江,胡安平,等.塔里木、四川和鄂尔多斯盆地海相碳酸盐岩规模储层发育地质背景初探[J].岩石学报,2015,31(11):3495-3508.ZHAO Wen-zhi,SHEN An-jiang,HU An-ping,et al. A discussion on the geological background of marine carbonate reservoirs development in Tarim,Sichuan and Ordos Basin,China[J]. Acta Petrologica Sinica,2015,31(11):3495-3508.
[13]杨伟利,王起琼,刘佳玮,等.鄂尔多斯盆地奥陶系马家沟组标准化层序地层学研究[J].西安科技大学学报,2017,37(2):234-241.YANG Wei-li,WANG Qi-cong,LIU Jia-wei,et al.Standardization of sequence stratigraphy in Ordovician Majiagou Formation,Ordos Basin[J]. Journal of Xi’an University of Science and Technology,2017,37(2):234-241.
[14]魏丽,王震亮,冯强汉,等.靖边气田北部奥陶系马五1亚段碳酸盐岩成岩作用及其孔隙结构特征[J].天然气地球科学,2015,26(12):2234-2244.WEI Li,WANG Zhen-liang,FENG Qiang-han,et al. Diagenesis in carbonate reservoir and pore structure characteristic from the Ordovician Ma51sub-member reservoir in the northern Jingbian Gasfield[J]. Natural Gas Geoscience,2015,26(12):2234-2244.
[15] Graham R D,Langhorne B,Smith J R. Structurally controlled hydrothermal dolomite reservoir facies:an overview[J]. American Association of Petrolem Geologists Bulletin,2006,90(11):1641-1690.
[16]孟万斌,肖春晖,冯明石,等.碳酸盐岩成岩作用及其对储层的影响———以塔中顺南地区一间房组为例[J].岩性油气藏,2016,28(5):26-33.MENG Wan-bin,XIAO Chun-hui,FENG Ming-shi,et al. Carbonate diagenesis and its influence on reservoir:a case study from Yijianfang Formation in Shunnan Area,central Tarim Basin[J]. Lithologic Reservoirs,2016,28(5):26-33.
[17] Kenward P A. Ordered low-temperature dolomite mediated by carboxyl-group density of microbial cell walls[J]. American Association of Petrolem Geologists Bulletin,2013,97(11):2113-2125.
[18] Bontognali T R R,Vasconcgelos C,Warthmann R J,et al. Dolomite Formation within microbial mats in the coastal sabkha of Abu Dhabi(United Arab Emirates)[J]. Sedimentology,2010,57(3):824-844.
[19]强娟,曹红霞,张宪旭,等.鄂尔多斯盆地中东部马家沟组白云岩地球化学特征研究[J].西安科技大学学报,2015,35(3):344-349.QIANG Juan,CAO Hong-xia,ZHANG Xian-xu,et al.Majiagou Formation in the central dolomite geochemistry characteristics and eastern part of Ordos Basin[J]. Journal of Xi’an University of Science and Technology,2015,35(3):344-349.
[20]包洪平,杨帆,蔡郑红,等.鄂尔多斯盆地奥陶系白云岩成因及白云岩储层发育特征[J].天然气工业,2017,37(1):32-45.BAO Hong-ping,YANG Fan,CAI Zheng-hong,et al. Origin and reservoir characteristics of Ordovician dolostones in the Ordos Basin[J]. Natural Gas Industry,2017,37(1):32-45.
[21]赵文智,沈安江,乔占峰,等.白云岩成因类型、识别特征及储集空间成因[J].石油勘探与开发,2018,45(6):923-935.ZHAO Wen-zhi,SHEN An-jiang,QIAO Zhan-feng,et al. Genetic types and distinguished characteristics of dolomite and the origin of dolomite reservoirs[J]. Petroleum Exploration and Development,2018,45(6):923-935.
[22]曹红霞,吴海燕,尚婷,等.延安地区马家沟组风化壳型储层孔隙结构及分类评价[J].西安科技大学学报,2018,38(3):426-434.CAO Hong-xia,WU Hai-yan,SHANG Ting,et al. Pore structure and classification evaluation of the weathered crust type reservoir of the Majiagou Formation in Yan’an Area[J]. Journal of Xi’an University of Science and Technology,2018,38(3):426-434.
[23]何江,冯春强,马岚,等.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):8-16.HE Jiang,FENG Chun-qiang,MA Lan,et al. Diagenesis and diagenetic facies of crust-weathered ancient Karst carbonate reservoirs[J]. Petroleum Geology&Experiment,2015; 37(1):8-16.
[24] Omid,Ghiasi-Freez,Javad,et al. Two intelligent pattern recognition models for automatic identification of textural and pore space characteristics of the carbonate reservoir rocks using thin section images[J]. Journal of Natural Gas Science and Engineering,2016(1):944-955.
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