渤南洼陷古近系天然气成藏条件
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摘要
渤南洼陷古近系天然气呈现良好的勘探前景。研究天然气成藏条件,有助于认识天然气的成藏过程和成藏机理,为今后的天然气勘探提供理论依据。综合利用地质、地震、测井和录井等资料,系统分析了该区的有利成藏条件。研究表明,渤南洼陷气源灶以沙四上亚段为主,热演化程度高,晚期成藏,具有优越的气源条件;各类扇体及次生孔隙形成古近系天然气较好的储集条件;沙三中、下亚段泥岩及沙四上的膏盐层与泥岩互层,共同构成了优质区域盖层与天然气保存条件;各成藏地质条件的有效配置是天然气聚集成藏的关键因素;渤南洼陷深层发育的膏盐层,相应形成盐间及盐下两套天然气成藏系统。生气中心及周缘广泛分布的各类扇体为该区下一步的勘探目标。
The prospect of natural gas exploration in Paleogene,Bonan sag is very promising.The study on the gas reservoir forming conditions will help to understand the forming process and the mechanism of the gas reservoirs,and to provide a theoretical basis for future gas exploration.It is carried out in this paper,based on geological,seismic and logging data in this area.It is shown that the main gas generating bed is the upper Sha4,with high thermal evolution degree,as a late accumulation,and with advantageous gas source conditions.All kinds of fans and secondary pores create favorable reservoir conditions of Eogene.Mudstone in middle and lower Sha3,together with salt bed and mudstone in upper Sha4,form a favorable regional cap bed and reservoir bed.The effective configuration of reservoir-forming and geologic conditions is the key factor of the natural gas accumulation.Deep Bonan sag correspondingly forms an inter and below salt bed natural gas reservoir-forming system.The gas generation center and the areas surrounding all kinds of fans are the next exploration targets.
The prospect of natural gas exploration in Paleogene,Bonan sag is very promising.The study on the gas reservoir forming conditions will help to understand the forming process and the mechanism of the gas reservoirs,and to provide a theoretical basis for future gas exploration.It is carried out in this paper,based on geological,seismic and logging data in this area.It is shown that the main gas generating bed is the upper Sha4,with high thermal evolution degree,as a late accumulation,and with advantageous gas source conditions.All kinds of fans and secondary pores create favorable reservoir conditions of Eogene.Mudstone in middle and lower Sha3,together with salt bed and mudstone in upper Sha4,form a favorable regional cap bed and reservoir bed.The effective configuration of reservoir-forming and geologic conditions is the key factor of the natural gas accumulation.Deep Bonan sag correspondingly forms an inter and below salt bed natural gas reservoir-forming system.The gas generation center and the areas surrounding all kinds of fans are the next exploration targets.
引文
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[16]单体珍.渤南洼陷沙四段沉积体系分析[J].新疆石油天然气,2008,4(2):26-29.Shan Tizhen.Xinjiang Oil&Gas,2008,4(2):26-29.
[2]吴富强.渤南洼陷沙四上亚段浊积体沉积相划分[J].新疆石油地质,2004,25(3):251-253.Wu Fuqiang.Xijiang Petroleum Geology,2004,25(3):251-253.
[3]胜利石油地质志编写组.中国石油地质志(卷六).胜利油田[M].北京:石油工业出版社,1993.Editorial Committee of"Petroleum Geology of China".Petroleum geologyof China(Vol.6):Shengli Oilfield[M].Beijing:Petoleum Industry Press,1993.
[4]张枝焕,曾艳涛,张学才.山东沾化凹陷渤南洼陷沙四段原油的地球化学特征及油源分析[J].现代地质,2004,18(4):578-584.Zhang Zhihuan,Zeng Yantao,Zhang Xuecai.Geoscience,2004,18(4):578-584.
[5]袁东山,张枝焕,曾艳涛,等.沾化凹陷渤南洼陷沙四段烃源岩有机相[J].天然气地球科学,2006,17(1):125-128.Yuan Dongshan,Zhang Zhihuan,Zeng Yantao,et al.Natural GasGeoscience,2006,17(1):125-128.
[6]朱光有,金强,张善文,等.渤南洼陷盐湖-咸水湖沉积组合及其油气聚集[J].矿物学报,2004,24(1):25-29.Zhu Guangyou,Jin Qiang,Zhang Shanwen,et al.Acta MineralogicaSinica,2004,24(1):25-29.
[7]康仁华,刘魁元,赵翠霞,等.济阳坳陷渤南洼陷古近系沙河街组沉积相[J].古地理学报,2002,4(4):19-26.Kang Renhua,Liu Kuiyuan,Zhao Cuixia,et al.Journal ofPalaeogeography,2002,4(4):19-26.
[8]刘家铎,吴富强,田景春.胜利油区渤南洼陷沙四上段沉积环境分析[J].矿物岩石,2001,21(3):8-15.Liu Jiaduo,Wu Fuqiang,Tian Jingchun.J Mineral Petrol,2001,21(3):8-15.
[9]朱光有,金强,张水昌,等.陆相断陷盆地复式成烃及成藏系统研究[J].石油学报,2004,25(2):12-18.Zhu Guangyou,Jin Qiang,Zhang Shuichang,et al.Acta Petrolei Sinica,2004,25(2):12-18.
[10]李孝军,李文涛,张海君.济阳坳陷裂解气成藏分析及勘探方向[J].油气地质与采收率,2005,12(1):42-45.Li Xiaojun,Li Wentao,Zhang Haijun.Petroleum Geology and RecoveryEfficiency,2005,12(1):42-45.
[11]孙海龙.渤南洼陷膏盐层发育与深层储层次生孔隙发育的关系[J].河南石油,2005,19(2):14-16.Sun Hailong.Henan Peroleum,2005,19(2):14-16.
[12]宫秀梅,曾溅辉.渤南洼陷古近系膏盐层对深层油气成藏的影响[J].石油勘探与开发,2003,30(5):24-27.Gong Xuemei,Zeng Jianhui.Petroleum Exploration and Development,2003,30(5):24-27.
[13]张子枢.世界大气田概论[M].北京:石油工业出版社,1990.Zhang Zishu.Introduction to the world's large gas field[M].Beijing:Petoleum Industry Press,1990.
[14]方少仙,候方浩.石油天然气储层地质学[M].东营:石油大学出版社,1998.Fang Shaoxian,Hou Fanghao.Oil and gas reservoir geology[M].Dongying:University of Petroleum Press,1998.
[15]孙锡文.渤南地区深层超压油气藏成因分析[J].断块油气田,2005,12(3):32-34.Sun Xiwen.Fault-Block Oil&Gas Field,2005,12(3):32-34.
[16]单体珍.渤南洼陷沙四段沉积体系分析[J].新疆石油天然气,2008,4(2):26-29.Shan Tizhen.Xinjiang Oil&Gas,2008,4(2):26-29.
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