湖相—浅水扇三角洲叠置砂体沉积模式

发布时间：2018-03-18 21:39

本文选题：沉积相　切入点：沉积模式　出处：《大庆石油地质与开发》2017年05期 　论文类型：期刊论文

【摘要】：沙湾凹陷三叠系百口泉组沉积相研究程度较浅,为了更好地预测有利砂体的分布范围,根据钻井、测井、地震及岩心等资料,对沙湾凹陷三叠系百口泉组砂砾岩的沉积环境和沉积特征进行了研究。研究表明,百口泉组发育扇三角洲和湖泊2种相类型,其中扇三角洲平原、扇三角洲前缘亚相最为发育;该组沉积于水浅、盆广的环境中,并由此建立了湖泊—浅水扇三角洲沉积模式,该模式表明有利储层主要为不同时期沉积的分流河道及水下分流河道叠置砂体;结合沉积相平面展布特征、沉积模式以及地层厚度分析,百二段沉积期物源供应充足,砂体相对较厚,同时由于上覆于百一段所以埋深相对较浅,物性较好,认为百二段为优势层段,并划分为3个级别。该结论对三叠系百口泉组下一步勘探及有利储层预测具有指导意义。
[Abstract]:The sedimentary facies of the Triassic Baikouquan formation in Shawan sag is relatively shallow. In order to better predict the distribution range of favorable sand bodies, according to the data of drilling, logging, seismic and core, etc. The sedimentary environment and sedimentary characteristics of the sandstones of the Triassic Baikouquan formation in Shawan depression have been studied. The results show that the Baikouquan formation has two facies types: fan delta and lake, among which fan delta plain and fan delta front subfacies are the most developed. The reservoir is deposited in shallow water and wide basin environment, and a lacustrine shallow water fan delta sedimentary model is established. The model shows that the favorable reservoirs are mainly distributary channel and underwater distributary channel superimposed sand body in different periods. Combined with the characteristics of plane distribution of sedimentary facies, sedimentary model and analysis of formation thickness, the provenance of the second member of the second member is abundant, the sand body is relatively thick, at the same time the buried depth is relatively shallow and the physical properties are better because of the overlying on the Baiyi formation. It is considered that the Baier formation is the dominant formation and can be divided into three grades. This conclusion is of guiding significance for the further exploration and favorable reservoir prediction of the Baikouquan formation of the Triassic system.
【作者单位】：中国石油西南油气田公司川西北气矿;长江大学非常规油气中心湖北省协同创新中心;中国石油大庆油田有限责任公司第六采油厂;中国石油新疆油田分公司勘探开发研究院;中国石油东方地球物理公司研究院大港分院;
【基金】：中国石油天然气股份公司“新疆大庆”重大科技专项(2012E-34-01)
【分类号】：P618.13

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