火山岩岩相-地震相响应关系及其应用——以三塘湖盆地马朗凹陷哈尔加乌组为例
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摘要
研究三塘湖盆地马朗凹陷哈尔加乌组火山岩地层油气藏的分布特征,明确勘探方向,有必要建立火山岩岩相与地震相响应关系并进行火山岩识别和预测。从钻井岩心和铸体薄片研究入手,在明确研究区火山岩岩性和岩相特征基础上,通过详细的井震标定,结合目的层的地震反射特征,归纳出岩相与地震相的响应关系,进而开展了火山岩储层预测。研究表明:哈尔加乌组火山岩岩相以溢流相、火山岩沉积相为主;地震反射主要表现为弱振幅空白透镜状反射相、中—弱振幅弱连续丘状反射相、中—强振幅中连续层状反射相;岩相识别和预测认为哈尔加乌组火山岩具中心式喷发特征,火山体呈层状或锥状,且具陆上和水下喷发并存的特征。结合成藏条件,认为中距火山口的杏仁状熔岩分布区是有利勘探区带。
In order to study the distribution characteristics and define the exploration direction of volcanic reservoirs of Haerjiawu Formation in Malang Sag of Santanghu Basin,it is necessary to establish the response relation between volcanic lithofacies and seismic facies,and carry out the identification and prediction of volcanic rocks.The cores and casting thin sections were used to define the lithologies and lithofacies characteristics of volcanic rocks.Combined detailed logging-seismic calibration and seismic response characteristics,this paper summarized the response relation between volcanic lithofacies and seismic facies,and then predicted the volcanic reservoirs.The study result shows that overflow facies and volcanic sedimentary facies are the main lithofacies of Haerjiawu Formation,and the seismic reflection characteristics mainly are weak swing and blank lenticular pattern,middle-weak swing and weakly continuous moundy pattern,middle-strong swing and moderate continuous lamellar phase.According to the prediction,it is considered that the volcanic rocks of Haerjiawu Formation has the characteristics of central type eruption,there are mostly layered volcanos or konides,and subaerial eruption and subaquatic eruption both can be found in the sag.The distributed area of mandelstone in mid-range crater is favorable for oil-gas exploration.
In order to study the distribution characteristics and define the exploration direction of volcanic reservoirs of Haerjiawu Formation in Malang Sag of Santanghu Basin,it is necessary to establish the response relation between volcanic lithofacies and seismic facies,and carry out the identification and prediction of volcanic rocks.The cores and casting thin sections were used to define the lithologies and lithofacies characteristics of volcanic rocks.Combined detailed logging-seismic calibration and seismic response characteristics,this paper summarized the response relation between volcanic lithofacies and seismic facies,and then predicted the volcanic reservoirs.The study result shows that overflow facies and volcanic sedimentary facies are the main lithofacies of Haerjiawu Formation,and the seismic reflection characteristics mainly are weak swing and blank lenticular pattern,middle-weak swing and weakly continuous moundy pattern,middle-strong swing and moderate continuous lamellar phase.According to the prediction,it is considered that the volcanic rocks of Haerjiawu Formation has the characteristics of central type eruption,there are mostly layered volcanos or konides,and subaerial eruption and subaquatic eruption both can be found in the sag.The distributed area of mandelstone in mid-range crater is favorable for oil-gas exploration.
引文
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[2]宋吉杰.松辽盆地北部兴城地区火山岩地震预测[J].石油地球物理,2007,42(3):315-317.
[3]张明学,吴杰,胡玉双.松辽盆地丰乐地区营城组火山岩储层预测[J].地球物理学进展,2009,24(6):2145-2150.
[4]邹才能,赵文智,贾承造,等.中国沉积盆地火山岩油气藏形成与分布[J].石油勘探与开发,2008,35(3):257-270.
[5]刘俊田,朱有信,李在光,等.三塘湖盆地石炭系火山岩油藏特征及主控因素[J].岩性油气藏,2009,21(3):23-28.
[6]刘俊田,刘媛萍,郭沫贞,等.三塘湖盆地牛东地区石炭系火山岩相储层特征及其形成机理[J].岩性油气藏,2009,21(2):64-69.
[7]赵澄林,孟卫工,金春爽,等.辽河盆地火山岩与油气[M].北京:石油工业出版社,1999:45-64.
[8]王璞珺,元林,刘万洙,等.松辽盆地火山岩相类型、特征和储层意义[J].吉林大学学报,2003,33(4):449-457.
[9]李全胜.三塘湖盆地牛东地区火山岩油气藏识别技术研究[J].岩性油气藏,2009,21(2):87-90.
[10]邵正奎,孟宪禄,王洪艳,等.松辽盆地火山岩地震反射特征及其分布规律[J].长春科技大学学报,1999,29(1):33-37.
[11]刘为付,孙立新,刘双龙.松辽盆地莺山断陷火山岩地震反射特征及分布规律[J].石油实验地质,2000,22(9):256-259.
[12]崔泽宏,汤良杰.塔河地区火山岩地震相及勘探潜力[J].新疆石油地质,2010,31(3):252-254.
[13]周路,靳利超,雷德文,等.北三台凸起石炭系火山岩地震响应及分布规律[J].西南石油大学学报:自然科学版,2008,30(6):5-10.
[14]张立伟,师永民,李江海.徐家围子断陷营一段火山岩旋回测井响应特征[J].北京大学学报:自然科学版,2009,45(3):481-486.
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