川东北元坝地区长兴组生物礁的识别
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摘要
元坝地区长兴组具有发育礁滩储层的沉积背景,地震剖面上显示有礁滩反射异常体,对钻遇长兴组礁滩储层的井进行含气性测试,获得了工业天然气流。长兴组埋藏深,地震资料的分辨率低,生物礁储层预测困难。综合多种方法对元坝地区的生物礁进行了识别。首先基于正演模拟结果和连井地震剖面,归纳总结了生物礁的地震响应模式;然后基于三维地震资料,识别了长兴期末期沉积地层的沉积相;最后基于三维地震数据体,应用波形分类技术、分频处理技术、相干体识别技术和古地貌恢复技术对长兴组生物礁的平面分布特征进行了刻画。较好地描述了长兴组生物礁的形态和展布特征。
Reef-flat reservoirs are developed in Changxing formation of Yuanba area.With this sedimentary background,some reef-flat seismic abnormal bodies have been discovered here.Commercial gas flow was obtained by gas testing in the wells encountered the reef reservoirs.The Changxing grouop is deep buried and its seismic data is with low resolution,which leads to the difficulty in reef reservoir prediction.Aiming at the problem,some methods were integrated to identify the reef in Yuanba area.Firstly,based on forward modeling results and well-tie seismic sections,the seismic response patterns of reef were concluded.Then,based on 3-D seismic data, the sedimentary facies of Changxing telophase was identified.Finally, based on 3-D seismic data volume,waveform classification recovery technique,frequency-division processing,coherent cube recognition technique and paleo-geomorphology technique were used to describe the plane distribution of reef in Changxing formation.The method has good effect,and well describes the shape and distribution characteristics of reef in Changxing formation.
Reef-flat reservoirs are developed in Changxing formation of Yuanba area.With this sedimentary background,some reef-flat seismic abnormal bodies have been discovered here.Commercial gas flow was obtained by gas testing in the wells encountered the reef reservoirs.The Changxing grouop is deep buried and its seismic data is with low resolution,which leads to the difficulty in reef reservoir prediction.Aiming at the problem,some methods were integrated to identify the reef in Yuanba area.Firstly,based on forward modeling results and well-tie seismic sections,the seismic response patterns of reef were concluded.Then,based on 3-D seismic data, the sedimentary facies of Changxing telophase was identified.Finally, based on 3-D seismic data volume,waveform classification recovery technique,frequency-division processing,coherent cube recognition technique and paleo-geomorphology technique were used to describe the plane distribution of reef in Changxing formation.The method has good effect,and well describes the shape and distribution characteristics of reef in Changxing formation.
引文
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[2]陈太源.九龙山构造南侧存在长兴组台缘礁的探讨[J].天然气工业,1989,9(1):6-9
[3]刘划一,王一刚,杨雨,等.川东上二叠统生物礁气藏多元信息综合预测方法研究[J].天然气工业,1999, 19(4):13-17
[4]于红枫,王英民,李雪,等.Stratimagic波形地震相分析在层序地层岩性分析中的应用[J].煤田地质与勘探,2006,34(1):64-66
[5]唐大海,谢继容.Stratimagic地震相分析技术在川中GSM油气勘探中的应用[J].四川地质学报,2004, 24(3):183-189
[6]冯凯,查朝阳,钟德盈.反演技术和频谱成像技术在储层预测中的综合应用[J].石油物探,2006,45(3): 262-266
[7]叶泰然,苏锦义,刘兴艳.分频解释技术在川西砂岩储层预测中的应用[J].石油物探,2008,47(1): 72-76
[8]胡宇芳,张云绵,杨建勋.频谱成像技术在油田勘探初期的应用[J].新疆石油地质,2006,27(6): 749-750
[9]付雷.相干体技术在三维地震资料中的运用[J].世界地质,2006,19(3):15-17
[10]刘传虎.地震相干分析技术在裂缝油气藏预测中的应用[J].石油地球物理勘探,2001,36(2):238-244
[11]赵俊兴,陈洪德,向芳.高分辨率层序地层学方法在沉积前古地貌恢复中的应用[J].成都理工大学学报(自然科学版),2003,30(1):76-81
[12]赵俊兴,陈洪德,时志强.古地貌恢复技术方法及其研究意义——以鄂尔多斯盆地侏罗纪沉积前古地貌研究为例[J].成都理工大学学报,2001,28(3): 260-266
[13]殷积峰.川东二叠系生物礁的地质特征与地震预测技术研究[D].北京:中国地质大学(北京),2008
[14]张敏知.生物礁地球物理响应特征及储层预测——以川东北SYB地区长兴组为例[D].成都:成都理工大学,2008
[15]沈安江,陈子炓,寿建峰.相对海平面升降与中国南方二叠纪生物礁油气藏[J].沉积学报,1999,17(3): 367-373
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