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古城地区鹰山组储层特征及成岩孔隙演化
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  • 英文篇名:The Reservoir Characteristics and the Pore Evolution of Yingshan Formation in Gucheng Region, Tarim Basin
  • 作者:张哨楠 ; 黄柏文 ; 隋欢 ; 叶宁 ; 李映涛
  • 英文作者:ZHANG Shaonan;HUANG Baiwen;SUI Huan;YE Ning;LI Yingtao;School of Geosciences and Technology,Southwest Petroleum University;College of Energy Resources,Chengdu University of Technology;Research Institute of Petroleum Exploration and Production,SINOPEC Northwest Company;
  • 关键词:塔里木盆地 ; 古城地区 ; 鹰山组 ; 成岩作用 ; 储层特征 ; 孔隙演化
  • 英文关键词:Tarim Basin;;Gucheng region;;Yingshan Formation;;diagenetic effects;;reservoir characteristics;;pore evolution
  • 中文刊名:XNSY
  • 英文刊名:Journal of Southwest Petroleum University(Science & Technology Edition)
  • 机构:西南石油大学地球科学与技术学院;成都理工大学能源学院;中国石化西北油田分公司勘探开发研究院;
  • 出版日期:2018-12-20 07:02
  • 出版单位:西南石油大学学报(自然科学版)
  • 年:2019
  • 期:v.41;No.192
  • 语种:中文;
  • 页:XNSY201901003
  • 页数:14
  • CN:01
  • ISSN:51-1718/TE
  • 分类号:36-49
摘要
针对古城地区鹰山组孔隙在成岩历史中演化的问题,基于岩芯描述、薄片鉴定、阴极发光、测井资料以及地球化学数据分析,对目的层岩石学特征、成岩作用和储层特征几个方面进行了研究。结果表明,古城地区鹰山组储层岩石类型以石灰岩与白云岩为主,其中,白云岩多分布于鹰山组下部,且细晶自形—半自形白云岩和中—粗晶它形白云岩表现出相对较好的孔渗性,储集空间以晶间孔隙、晶间溶孔及裂缝为主,形成的主要储层类性为裂缝型、孔隙型和裂缝—孔洞型。研究区成岩作用对储层储集性能影响较大,其中,早期胶结作用、压实压溶作用、硅化作用以及热液矿物的充填对原生孔隙起破坏作用,浅埋藏白云石化作用、破裂作用、热液溶蚀作用为建设性成岩作用。由于过渡白云石化作用的影响,白云岩晶间孔隙发育程度较低,热液溶蚀作用对优质储层的形成起关键性作用。
        This study focuses on the pore evolution during the diagenetic period of the Yingshan Formation in the Gucheng region in the Tarim Basin. Specifically, the petrophysical characteristics, diagenetic effect, and reservoir characteristics of the target layers are investigated based on the analysis of core description, flake identification, cathodoluminescence, well logging data, and geochemical data. The results show that reservoir rocks of Yingshan Formation in Gucheng region are primarily composed of limestone and dolomite. Of which, the dolomite is mostly distributed in the lower section of the Yingshan Formation.Furthermore, the fine grained automorphic-semi-automorphic dolomite and medium-coarse crystalline dolomite both exhibit relatively good porosity. The reservoir space is mainly made up of intercrystalline pores, intercrystalline pores and cracks,which forms three types of reservoirs including the crack type, pore type, and crack-hole type reservoirs. The diagenetic effect has a significant impact on the storing performance of the reservoir in the research region. In particular, the early cementation,compaction and pressure dissolution, silieidation, and filling of hydrothermal minerals have a destructive effect on the primary pores. The dolonitization, rupture, and hydrothermal dissolution in the shallow burial are constructive diagenetic effects.Affected by the transitional dolomitization, the intercrystalline pores in dolomites exhibit a low degree of development. The hydrothermal dissolution effect plays a key role in the formation of high-quality reservoir.
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