川西洛带气田遂宁组气藏薄储层识别技术
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摘要
川西洛带气田上侏罗统遂宁组发育冲积扇—河流—三角洲—湖泊沉积体系,薄层砂体主要发育于该组中上部,对薄储层的准确预测是实现该气藏高效勘探开发的关键。为此,在对气藏储层基本特征研究的基础上,应用常规测井方法将该区储层分为块状和互层状两类,并建立了气层、含气层的定量识别模型;而在地震勘探上,仅仅依靠振幅属性资料很难识别和预测含气砂体的空间展布,但依靠多井约束波阻抗反演就能较好地追踪含气砂体,"强振幅、高阻抗"是砂岩含气的响应特征。应用测井相和地震相结合的识别方法较有效地解决了该气藏薄储层的识别与追踪难题。
Alluvial fan-fluvial-delta-lacustrine deposit system is developed in Suining formation of Luodai Gas Field, west Sichuan Basin, with the thin sandstone bodies mainly developed in the upper and middle parts of the formation, therefore, to predict the thin reservoir accurately is very crucial for effective exploration and exploitation of gas reservoirs. Based on the analysis for the basic properties of the gas-bearing reservoir, this study divided the reservoirs into two types: blocky reservoir and interbedding reservoir by using conventional logging methods, and set up the quantitative recognition patterns for gas-bearing reservoir. In seismic exploration, it is very difficult to predict the spatial distribution of the gas-bearing sandstone body with only the amplitude attribute information; however, the gas-bearing sandstone bodies can be tracked very well by using well constraint acoustic impedance inversion in which "strong amplitude and high acoustic impedance" are the response properties of the gas-bearing sandstone.Therefore, the reservoir recognition method combining logging and seismic methods can effectively recognize and track the thin gas-bearing reservoir, and provides the technical supports for the gas reservoir production.
Alluvial fan-fluvial-delta-lacustrine deposit system is developed in Suining formation of Luodai Gas Field, west Sichuan Basin, with the thin sandstone bodies mainly developed in the upper and middle parts of the formation, therefore, to predict the thin reservoir accurately is very crucial for effective exploration and exploitation of gas reservoirs. Based on the analysis for the basic properties of the gas-bearing reservoir, this study divided the reservoirs into two types: blocky reservoir and interbedding reservoir by using conventional logging methods, and set up the quantitative recognition patterns for gas-bearing reservoir. In seismic exploration, it is very difficult to predict the spatial distribution of the gas-bearing sandstone body with only the amplitude attribute information; however, the gas-bearing sandstone bodies can be tracked very well by using well constraint acoustic impedance inversion in which "strong amplitude and high acoustic impedance" are the response properties of the gas-bearing sandstone.Therefore, the reservoir recognition method combining logging and seismic methods can effectively recognize and track the thin gas-bearing reservoir, and provides the technical supports for the gas reservoir production.
引文
[1]尹朝云等,洛带气田遂宁组气藏新增天然气探明储量报告,2003年;
[2]曾焱、卜淘等,洛带气田遂一气藏开发方案,2004年;
[3]卜淘等,洛带气田遂宁组气藏储层精细评价,2005年。
[1]郭正吾,邓康龄,韩永辉,等.四川盆地形成与演化[M].北京:地质出版社.
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[3]林绍文,李定军,罗丽琼,等.洛带气田遂宁组致密砂岩储层测井评价[J].天然气工业,2006,26(4):44-46.
[4]李岩峰,刘殊.四川洛带气田遂宁组储层地震响应特征及预测[J].勘探地球物理进展,2005,27(5):352-358.
[5]罗啸泉,张箭,卜淘.川西坳陷洛带地区遂宁组气藏成藏模式[J].天然气工业,2007,27(3):13-16.
[6]胡晓强,陈洪德,纪相田,等.川西前陆盆地侏罗系层序地层[J].西南石油学院学报,2006,28(2):16-19.
[7]廖曦,马波.应用JASON软件进行砂体及含气性预测[J].天然气勘探与开发,2002,25(3):34-43.
[2]曾焱、卜淘等,洛带气田遂一气藏开发方案,2004年;
[3]卜淘等,洛带气田遂宁组气藏储层精细评价,2005年。
[1]郭正吾,邓康龄,韩永辉,等.四川盆地形成与演化[M].北京:地质出版社.
[2]丘东洲.四川盆地西部坳陷晚三叠—早白垩世地层沉积相[J].四川地质学报,2000(3):161-170.
[3]林绍文,李定军,罗丽琼,等.洛带气田遂宁组致密砂岩储层测井评价[J].天然气工业,2006,26(4):44-46.
[4]李岩峰,刘殊.四川洛带气田遂宁组储层地震响应特征及预测[J].勘探地球物理进展,2005,27(5):352-358.
[5]罗啸泉,张箭,卜淘.川西坳陷洛带地区遂宁组气藏成藏模式[J].天然气工业,2007,27(3):13-16.
[6]胡晓强,陈洪德,纪相田,等.川西前陆盆地侏罗系层序地层[J].西南石油学院学报,2006,28(2):16-19.
[7]廖曦,马波.应用JASON软件进行砂体及含气性预测[J].天然气勘探与开发,2002,25(3):34-43.
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