页岩岩相测井表征方法——以准噶尔盆地玛湖凹陷风城组为例  

Logging identification method of shale lithofacies:a study of Fengcheng Formation in Mahu Sag,Junggar Basin

作　　者：张益粼 王贵文[1,2] 宋连腾[3] 包萌 黄玉越 赖锦[1,2] 王松 黄立良[4] ZHANG YiLin;WANG GuiWen;SONG LianTeng;BAO Meng;HUANG YuYue;LAI Jin;WANG Song;HUANG LiLiang(College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China;State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 102249,China;PetroChina Research Institute of Petroleum and Development,Beijing 100083,China;Research Institute of Exploration and Development,Xinjiang Oilfield Company,Karamay 834000,China)

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [3]中国石油勘探开发研究院,北京100083 [4]中国石油新疆油田分公司勘探开发研究院,克拉玛依834000

出　　处：《地球物理学进展》2023年第1期393-408,共16页Progress in Geophysics

基　　金：国家自然科学基金(41872133);中国石油-中国石油大学(北京)战略合作协议(ZLZX2020-01-05-03)联合资助。

摘　　要：页岩油气藏作为重要的非常规油气藏,富含巨大的油气资源潜力,且常形成于深湖-半深湖沉积体系.页岩中复杂的矿物成分以及沉积组构类型对于页岩储层物性、含油性和可动性具有重要的影响,因此“矿物成分+沉积组构”的岩相划分与识别是页岩储层油气勘探开发的关键所在.但由于目前常规测井纵向分辨率有限导致无法实现页岩中毫米尺度的沉积组构精细描述,在页岩“矿物成分+沉积组构”岩相的识别方面尚未形成完整的方法理论体系.本文由此将利用岩心刻度测井的方法,通过岩性扫描测井与微电阻率成像测井相结合的方法,对玛湖凹陷风城组页岩层段的矿物成分和沉积组构类型进行连续识别,实现单井页岩段“矿物成分+沉积组构”岩相类型划分.通过岩相划分结果与现场试油试采资料相对照,发现薄层状与厚层状长石-石英质泥页岩相叠置发育的岩相组合产能最佳,因此可作为风城组页岩层段的优势岩相组合进行深入研究,为后续勘探开发提供参考.According to its great oil and gas resource potential,shale oil and gas reservoir becomes an extremely important unconventional oil and gas reservoir,and is often formed in semi-deep lacustrine sedimentary system.The physical property,oiliness and mobility of shale reservoirs are attributed to complex mineral composition and sedimentary fabric types in shale reservoir.Therefore the classification and identification of lithofacies according to mineral composition and sedimentary fabric type is essential for exploration and development in shale reservoirs.Conventional logs are unavailable to describe millimeter level sedimentary fabric in shale reservoirs due to vertical resolution limitation,resulting in lacking of lithofacies identification methods for dividing mineral composition and sedimentary fabric.In this study,the mineral composition and sedimentary fabric of Fengcheng Formation in Mahu Sag is continuously divided through the method of core calibrated lithoscanner logs and image logs.Therefore,lithofacies composed of mineral composition and sedimentary fabric in Fengcheng Formation are identified by the above method.Comparing the lithofacies classification results with the oil test and production data,the following conclusions can be drawn.The lithofacies combination of thin-layered feldspar-quartz shale facies and thick-layered feldspar-quartz shale facies have the best productivity,which can be regarded as the best lithofacies for more exploration and development.

关 键 词：页岩 沉积组构 岩相 岩性扫描测井 微电阻率成像测井 

分 类 号：P631[天文地球—地质矿产勘探]