摘要
现有勘探成果表明,徐家围子断陷深层下白垩统沙河子组(K_1sh)不仅是烃源岩层,且其中的致密砂岩也可作为储层,是松辽盆地天然气勘探的又一个新领域。K_1sh致密砂岩储层具有物性差,非均质性强,砂泥薄互层、多层叠置的特点,常规叠后地震反演方法预测难度大。在精细构造解释的基础上,通过分析宋站-汪家屯地区K_1sh岩性、储层的岩石物理特征,基于叠前同时反演方法预测了扇三角洲、辫状河三角洲、湖相沉积的泥岩和砂岩的分布以及储层的分布,建立了一套K1sh致密砂岩储层预测的技术流程,并在新井钻探中取得了较好的应用效果。
The present exploration results indicated that the deep zone of Shahezi Formation(K_1sh)in Xujiaweizi Fault Depression was not only a hydrocarbon source rock,the dense sandstone in the depression also could be used as a reservoir,which was a new field of natural gas exploration in Songliao Basin.The Shahezi Formation of tight gas reservoir,where the thin sand bodies interbedded in thin shale layers,has poor physical property and strong heterogeneity.The tight sandstone reservoir in K_1sh was characterized by poor physical property,strong heterogeneity,thin sand and mud interbeds and multi-layer superposition,conventional pre-stack seismic inversion was difficult for prediction.Through the analysis of petrophysical characteristics of lithology and reservoir in Songzhan-Wangjiatun Area,on the basis of fine structural interpretation,the distribution of mudstone and sand bodies of fan delta,braided river delta,lake facies deposition are predicted.A set of technical flow is established for predicting tight sandstone reservoirs in K_1sh,and good results are achieved in the new well drillings.
出处
《长江大学学报（自然科学版）》
CAS
2018年第19期18-21,共4页
Journal of Yangtze University(Natural Science Edition)
基金
中国石油天然气股份有限公司重大科技专项(2012E-2603-02)
关键词
沙河子组
沉积相
岩性预测
储层预测
Shahezi Formation
sedimentary facies
lithology prediction
reservoir prediction
