川南H地区长兴组台内滩相储层预测方法研究

PREDICTING INTRA-PLATFORM SHOAL-FACIES RESERVOIR OF CHANGXING FORMATION, H AREA, SOUTHERN SICHUAN BASIN

川南H地区长兴组已有多口井获气,属台地相沉积。开展的地震工作多为线距较宽的二维地震勘探,地质资料相对匮乏。近年来,随着勘探开发的不断深入和有效勘探概念的提出,诸多地质问题逐渐暴露,地震构造解释及储层预测朝着更加精细的方向发展。本次研究从地震资料出发,地震与地质相结合,通过多种属性分析,从根本上分析地质(岩性)与地震资料的相关性,以此划分有利相带。利用储层的地球物理响应特征并结合多种地震属性综合预测储层的有利分布区域。

Commercial gas has been gained from many wells of Changxing Formation, H area in southern Sichuan Basin. This reservoir is just deposited at a platform facies. Previous seismic work was mostly 2D seismic and only little geological data were gained. Recently, with further exploration and development as well as the emergence of a new concept 'Effective Exploration', a lot of problems have been gradually revealed, and both seismic structural interpretation and reservoir prediction develop towards a finer direction. In this study, the correlation between lithology and seismic data was analyzed by multiple attributes, and further some favorable belts were made clear. A favorable reservoir distribution area could be predicted according to geophysical response features and multiple seismic attributes.