准西海相浅层石炭系火山凝灰岩油气发现的意义
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摘要
2011年,准西海相浅层石炭系火山凝灰岩油气勘探取得了突破,见到了良好的油气显示,特别是排61井在855.7～949.6 m井段,常规试油获得日产6 t的工业油流,50℃地面脱气原油黏度为390 mPa.s。排61地区石炭系稳定的海相沉积层既是深部油源岩,又是优质储集层。岩浆活动提供了火山岩储层发育和分布的基础。火山凝灰岩经受了强烈的风化作用和有机酸溶蚀作用,风化壳及次生裂缝很发育,成为优质储层。深部二叠系油气沿红车断裂带和地层超剥带不整合面向高部位运聚成藏。二叠系和三叠系致密的火山岩或泥岩沉积覆盖作为区域性盖层对石炭系油气后期保存至关重要。针对石炭系储层成像较差的难题发展了地震叠前时间偏移处理技术,火山岩地震和测井响应特征比较明显,应用成像测井和核磁共振技术实现了裂缝的定性识别和定量描述。
In 2011,petroleum exploration of marine deposit,shallow,Carboniferous,and volcanic tuff reservoir realized breakthroughs at Chepaizi slope in the western margin of Junggar Basin,Pai 61 well,with 855.7 ~949.6 m section,and the conventional test oil obtained 6 t/d industrial oil flow.The surface viscosity is 390 mPa·s(50 ℃).The marine sediments of Carboniferous are both deep oil source rocks and high-quality reservoir.Magma volcanic activity provides the basis for volcanic reservoir development and distribution.The weathering crust and secondary cracks developed volcanic tuff by strong rock weathering and dissolution of organic acids and became top quality reservoir.Deep Permian oil-gas migrated and accumulated to high parts along Hong-Che fault belt and stratigraphic unconformity stripping.Permian and Triassic volcanic rocks or dense mudstone sedimentary cover as a regional seal for the late Carboniferous oil-gas to save critical.The seismic pre-stack time migration processing technologies for the problem of poor inner structures of Carboniferous were developed.Response of volcanic rock seismic and logging are obviously.The application imaging logging and nuclear magnetic technology achieved the qualitative identification and quantification of fracture description.
In 2011,petroleum exploration of marine deposit,shallow,Carboniferous,and volcanic tuff reservoir realized breakthroughs at Chepaizi slope in the western margin of Junggar Basin,Pai 61 well,with 855.7 ~949.6 m section,and the conventional test oil obtained 6 t/d industrial oil flow.The surface viscosity is 390 mPa·s(50 ℃).The marine sediments of Carboniferous are both deep oil source rocks and high-quality reservoir.Magma volcanic activity provides the basis for volcanic reservoir development and distribution.The weathering crust and secondary cracks developed volcanic tuff by strong rock weathering and dissolution of organic acids and became top quality reservoir.Deep Permian oil-gas migrated and accumulated to high parts along Hong-Che fault belt and stratigraphic unconformity stripping.Permian and Triassic volcanic rocks or dense mudstone sedimentary cover as a regional seal for the late Carboniferous oil-gas to save critical.The seismic pre-stack time migration processing technologies for the problem of poor inner structures of Carboniferous were developed.Response of volcanic rock seismic and logging are obviously.The application imaging logging and nuclear magnetic technology achieved the qualitative identification and quantification of fracture description.
引文
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[11]何登发,陈新发,况军.准噶尔盆地石炭系油气成藏组合特征及勘探前景[J].石油学报,2010,31(1):1-11.
[12]康玉柱.创新石油与战略思考[J].中国工程科学,2012,14(3):37-40.
[2]贾承造,赵政璋,杜金虎.中国石油重点勘探领域—地质认识、核心技术、勘探成效及勘探方向[J].石油勘探与开发,2008,35(4):385-396.
[3]Graham S A,Brassell S,Carroll A R,et a1.Characteristics of se-lected petroleum source rocks,Xinjiang Uygur autnomous region,North—west China[J].AAPG Bulletin,1990,74(4):493-512.
[4]Yian Y.Fault-controlled hydrocarbon distribution in the Juaggarbasin,NWChina[J].Journal of Petroleum Geology,1993,6(1):109-114.
[5]康玉柱.新疆两大盆地石炭-二叠系火山岩特征与油气[J].石油试验地质,2008,30(4):321-327.
[6]匡立春,薛新克,邹才能.火山岩岩性地层油藏成藏条件与富集规律———以准噶尔盆地克-百断裂带上盘石炭系为例[J].石油勘探与开发,2007,34(3):285-290.
[7]Zeng H L,John A,Katherine G J.Frequency dependent seismicstratigraphy[J].SEG Technical Program Expanded Abstracts,2009,28:93-96.
[8]蔡希源.川东北元坝地区长兴组大型生物礁滩体岩性气藏储层精细刻画技术及勘探实效分析[J].中国工程科学,2011,13(10):28-33.
[9]陈波,孙德胜,朱筱敏.利用地震数据分频相干技术检测火山岩裂缝[J].石油地球物理勘探,2011,46(4):610-613.
[10]匡立春,吕焕通,王绪龙.准噶尔盆地天然气勘探实践与克拉美丽气田的发现[J].天然气工业,2010,30(2):1-6.
[11]何登发,陈新发,况军.准噶尔盆地石炭系油气成藏组合特征及勘探前景[J].石油学报,2010,31(1):1-11.
[12]康玉柱.创新石油与战略思考[J].中国工程科学,2012,14(3):37-40.
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