【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。更多还原

【Abstract】 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.更多还原