川南地区龙马溪组页岩气“甜点区”地震预测技术

发布时间：2018-06-21 16:25

本文选题：页岩气 + 甜点　；参考：《煤炭科学技术》2017年05期

【摘要】：为寻找页岩气勘探开发的"甜点"区,以四川盆地南部下志留统龙马溪组页岩气层为研究对象,从页岩储层总有机碳(TOC)含量、脆性和裂缝发育带等方面,就页岩气"甜点区"地震预测关键技术进行了研究。TOC含量预测采用地震岩石物理分析和叠前反演技术相结合的方法;裂缝发育情况利用叠后地震曲率体技术进行预测;脆性方面通过叠前反演技术预测高脆性指数发育区,来确定有利压裂品质区。综合TOC含量、裂缝、脆性预测结果,表明龙马溪组龙一1亚段是TOC含量高、裂缝发育、脆性好的"甜点"发育层位,川南长宁地区N201区块的中部、南部及西南部地区为"甜点"发育区。通过该套地震预测技术,可优选出页岩气"甜点"区,为页岩气勘探开发井位部署提供依据。
[Abstract]:In order to find the "desserts" area for shale gas exploration and development, taking the Lower Silurian Longmaxi formation shale gas formation in the southern Sichuan Basin as the research object, from the aspects of total organic carbon (TOC) content, brittleness and fracture development zone of shale reservoir, etc. The key techniques for seismic prediction of shale gas "dessert area" are studied. The method of combining seismic rock physical analysis with pre-stack inversion technique is used to predict the content of TOC, and the development of fractures is predicted by post-stack seismic curvature body technique. In the aspect of brittleness, the prestack inversion technique is used to predict the development region of high brittleness index to determine the favorable fracturing quality area. Based on the prediction results of TOC content, fracture and brittleness, it is shown that the Long-1 submember of Longmaxi formation is a "dessert" developing horizon with high TOC content, fracture development and good brittleness, and the middle part of block N201 in Changning area, South Sichuan Province. The southern and southwestern regions are desserts. Through this set of seismic prediction technology, shale gas "dessert" area can be selected to provide basis for shale gas exploration and development well location deployment.
【作者单位】：中国科学院大学;中国科学院渗流流体力学研究所;中国石油勘探开发研究院廊坊分院;
【基金】：国家重点基础研究发展计划(973)资助项目(2013CB228000)
【分类号】：P618.13;P631.4

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