礁滩相地震响应特征和油气勘探远景
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摘要
长兴组礁滩相储层在川东北地区广泛分布,含气量丰富,但生物礁储层预测一直是油气勘探的难点,发现生物礁的钻井多数为随机钻遇的。为此,利用高分辨率高信噪比地震资料,采用从已知气田预测模式入手对未知区域进行分析的方法,对长兴期礁滩相的分布状态进行了预测。首先对研究区的构造和沉积背景进行了描述,对长兴组礁滩相地震响应特征进行了分析;然后通过解剖普光气田长兴组礁滩相的地震响应特征和层序地层学特征,确立了礁滩相储层预测方法,重点对通南巴构造和通南巴构造带-九龙山构造南侧的礁滩相层序地层特征和地震响应特征进行了分析,预测了这2个构造的礁滩相分布区,评价了礁滩相的油气勘探远景。
The reef flat facies reservoir of Changxing formation is widely distributed in the southwest Sichuan province and is abundant in gas. However, the forecast of reef reservoir is always a difficult thing in hydrocarbon exploration and most of the wells in which the reef is found by accident. Aiming at this problem, the distribution of reef flat facies reservoir in Changxing stage is forecast based on the high signal-to-noise ratio seismic data and the known gas field forecast model First, structure and depositional setting of the area are described and response characteristic of the reef flat facies reservoir of Changxing formation is analyzed; then, through analyzing seismic response characteristic and sequence stratigraphy feature of the reef flat facies reservoir of Changxing formation in Puguang oilfield, the methods of forecasting reef flat facies reservoir is established and the seismic response characteristic and sequence stratigraphy feature of reef flat facies reservoir in Tongnanba structure and in Tongnanba structure belt-the south of the Jiulongshan structure are specially analyzed. On the basis of this, the distribution of reef flat facies of these two geological structures is predicted. Finally, the hydrocarbon exploration perspective is evaluated.
The reef flat facies reservoir of Changxing formation is widely distributed in the southwest Sichuan province and is abundant in gas. However, the forecast of reef reservoir is always a difficult thing in hydrocarbon exploration and most of the wells in which the reef is found by accident. Aiming at this problem, the distribution of reef flat facies reservoir in Changxing stage is forecast based on the high signal-to-noise ratio seismic data and the known gas field forecast model First, structure and depositional setting of the area are described and response characteristic of the reef flat facies reservoir of Changxing formation is analyzed; then, through analyzing seismic response characteristic and sequence stratigraphy feature of the reef flat facies reservoir of Changxing formation in Puguang oilfield, the methods of forecasting reef flat facies reservoir is established and the seismic response characteristic and sequence stratigraphy feature of reef flat facies reservoir in Tongnanba structure and in Tongnanba structure belt-the south of the Jiulongshan structure are specially analyzed. On the basis of this, the distribution of reef flat facies of these two geological structures is predicted. Finally, the hydrocarbon exploration perspective is evaluated.
引文
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9王兴志,张帆,马青．四川盆地东部晚二叠世-早三叠世飞仙关期礁、滩特征与海平面变化[J]．沉积学报, 2002,20(2):249-254
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11汪泽成,赵文智,张林等．四川盆地构造层序与天然气勘探[M]．北京:地质出版社,2002．1-140
12许效松,刘宝珺,牟传龙．中国中西部海相盆地分析与油气资源[M]．北京:地质出版社,2004．119-161
2张继庆,李汝宁,官举铭等．四川盆地及邻区晚二叠世生物礁[M]．四川成都:四川科学技术出版社,1990．31-56
3吴熙纯,刘效曾,杨仲伦等．川东上二叠统长兴组生物礁控储层的形成[J]．石油与天然气地质,1990,11(3): 283-296
4朱同兴,黄志英,惠兰．上扬子台地晚二叠世生物礁相地质[M]．北京:地质出版社,1999．1-103
5范嘉松,吴亚生．川东二叠纪生物礁再认识[J]．石油与天然气地质,2002,23(1):12-18
6牟传龙,谭钦银,王立全等．四川宣汉盘龙洞晚二叠世生物礁古油藏的发现及其重要意义[J]．地质论评, 2003,49(3):315-319
7牟传龙,谭钦银,余谦等．四川宣汉盘龙洞晚二叠世生物礁古油藏剖面序列[J]．沉积与特提斯地质,2003,23 (3):60-64
8牟传龙,谭钦银,余谦等．川东北地区上二叠统长兴组生物礁组成及成礁模式[J]．沉积与特提斯地质,2004, 24(3):65-71
9王兴志,张帆,马青．四川盆地东部晚二叠世-早三叠世飞仙关期礁、滩特征与海平面变化[J]．沉积学报, 2002,20(2):249-254
10王一刚,陈盛吉,徐世琦．四川盆地古生界、上元古界天然气成藏条件及勘探技术[M]．北京:石油工业出版社,2001．69-77,39-40
11汪泽成,赵文智,张林等．四川盆地构造层序与天然气勘探[M]．北京:地质出版社,2002．1-140
12许效松,刘宝珺,牟传龙．中国中西部海相盆地分析与油气资源[M]．北京:地质出版社,2004．119-161
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