四川盆地下古生界有利勘探区带的地震预测技术
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摘要
为了开拓四川盆地下古生界勘探的新局面,基于地震资料处理解释一体化的思想,针对深层开展了地震老资料的重新处理、统一解释及有利区带预测等一系列探索研究工作,从而形成了一套下古生界有利勘探区带的地震预测技术,包括提高成像质量的处理技术、储层裂缝预测及流体判别等技术。实际应用取得了明显效果,不仅在西山构造上解决了地震成像难题,同时率先对四川盆地北抵广元、南达长宁、东至雅安、西抵华蓥山约96 000km2范围内下古生界有利勘探区带进行了地震预测和综合评价,划分出了犍为—荣县—威远—资中—自贡有利勘探区带、安岳西南—安平店—磨溪—龙女寺有利勘探区带和隆昌东南—阳高寺—西山—铜梁—合川有利勘探区,并取得了良好的钻探效果。
In order to make a breakthrough in the exploration of the Lower Paleozoic in the Sichuan Basin,those old seismic data are reprocessed and reinterpreted on the deep formations and a series of exploratory studies have been performed on the prediction of favorable plays.Therefore,a set of seismic prediction techniques suitable for the Lower Paleozoic in the study area are developed,including seismic processing with a high imaging quality,the prediction of fractures in the reservoirs,and fluid identification.With these techniques in actual application,problems of seismic imaging in the Xishan structure were solved,and the favorable Lower Paleozoic plays in an area of 96000km2(north to Guangyuan,south to Changning,east to Ya'an,west to the Huayingshan Mountain) in the Sichuan Basin were predicted and evaluated.Thus,three favorable play fairways were identified,namely the zones of Jianwei -Rongxian-Weiyuan-Zizhong-Zigong,southwest Anyue-Anpingdian-Moxi-Longnüsi,and southeast Longchang-Yanggaosi-Xishan-Tongliang-Hechuan.
In order to make a breakthrough in the exploration of the Lower Paleozoic in the Sichuan Basin,those old seismic data are reprocessed and reinterpreted on the deep formations and a series of exploratory studies have been performed on the prediction of favorable plays.Therefore,a set of seismic prediction techniques suitable for the Lower Paleozoic in the study area are developed,including seismic processing with a high imaging quality,the prediction of fractures in the reservoirs,and fluid identification.With these techniques in actual application,problems of seismic imaging in the Xishan structure were solved,and the favorable Lower Paleozoic plays in an area of 96000km2(north to Guangyuan,south to Changning,east to Ya'an,west to the Huayingshan Mountain) in the Sichuan Basin were predicted and evaluated.Thus,three favorable play fairways were identified,namely the zones of Jianwei -Rongxian-Weiyuan-Zizhong-Zigong,southwest Anyue-Anpingdian-Moxi-Longnüsi,and southeast Longchang-Yanggaosi-Xishan-Tongliang-Hechuan.
引文
[1]蒋晓光,李雅彬,杨智仁.川东高陡构造的深度偏移应用研究[J].天然气工业,2003,23(6):73-76.
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[5]张光荣,徐世琦,蒋小光.乐山—龙女寺古隆起区含气有利区带评价[J].天然气工业,2008,28(增刊1):19-21.
[2]熊翥.复杂地区地震数据处理思路[M].北京:石油工业出版社,2002.
[3]郑鸿明,吕焕通,娄兵,等.地震勘探近地表异常校正[M].北京:石油工业出版社,2009.
[4]曾凡惠,周小海,王建斌,等.镇巴复杂区地震资料成像处理策略[J].天然气工业,2007,27(增刊1):178-180.
[5]张光荣,徐世琦,蒋小光.乐山—龙女寺古隆起区含气有利区带评价[J].天然气工业,2008,28(增刊1):19-21.
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