岩性油气藏 ›› 2016, Vol. 28 ›› Issue (3): 74–85.doi: 10.3969/j.issn.1673-8926.2016.03.011

• 油气地质 • 上一篇    下一篇

致密砂岩储层岩石物理相分类与优质储层预测—— — 以川中安岳地区须二段储层为例

柴 毓1,2,王贵文2,3   

  1. 1. 石油工业出版社有限公司,北京 100011 ; 2. 中国石油大学(北京) 地球科学学院,北京 102249 ;3. 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
  • 出版日期:2016-05-20 发布日期:2016-05-20
  • 第一作者::柴毓( 1989- ),女,硕士,编辑,主要从事图书编辑方面的工作。 地址:( 100011 )北京市朝阳区安华西里三区 18 号楼石油工业出版社有限公司。 E-mail : cherrychai213@126.com
  • 基金资助:

    国家大型油气田及煤层气开发重大科技专项“低渗透碎屑岩储层品质与岩石物理相测井评价方法”(编号:2011ZX05020-008 )资助

Petrophysical facies classification of tight sandstone reservoir and high-quality reservoir prediction: A case study from the second member of Xujiahe Formation in Anyue area, central Sichuan Basin

  Chai Yu12, Wang Guiwen23   

  1. Petroleum Industry PressBeijing 100011China2.College of GeosciencesChina University of PetroleumBeijing 102249China3.State Key Laboratory of Petroleum Resource and ProspectingChina University of PetroleumBeijing 102249China
  • Online:2016-05-20 Published:2016-05-20

摘要:

受沉积、成岩及构造等多种地质作用的影响,川中安岳地区须家河组储层较致密、物性较差且非均质性较强。 为了更精确地预测优质储层的分布及其内部储集性的差异,利用岩心、薄片、压汞及测井等资料,根据岩石物理相的概念,对川中安岳地区须二段致密砂岩储层的岩性岩相、成岩相、裂缝相及孔隙结构相等 4 个主控因素进行研究,划分出 5 类岩性岩相、 5 类成岩相、 4 类裂缝相及 4 类孔隙结构相,建立了测井表征方法和测井识别标准,并在此基础上提出岩石物理相的分类及储层定量评价标准。 优质储层主要位于有利的岩性岩相、成岩相、裂缝相及孔隙结构相的叠加处,即有利的岩石物理相带。 根据纵向及平面上须二段储层岩石物理相的定量划分,优选出优质储集体,其主要位于斜坡中低部位相对高孔渗区和北部裂缝发育带。 岩石物理相的研究可为储集层的精细表征及优质储集体的预测和评价提供依据。

关键词: 层序地层, 沉积体系, 文昌组, 陆丰凹陷, 珠江口盆地

Abstract: Affectedby geological processes including deposition, diagenesis and tectonism, reservoirs of Xujiahe Formation in central Sichuan Basin are relatively compact with poor physical properties and strong heterogeneity. In order to predict the distribution of high-quality reservoirs and their internal differences of reservoir properties, based on the concept of petrophysical facies, the data of core, thin sections, mercury injection and well logs were utilized to study four controlling factors including lithology and lithofacies, diagenetic facies, fracture facies and pore structure facies of the tight sandstone reservoir of the second member of Xujiahe Formation in Anyue area. Five types of lithology and lithofacies, five types of diagenetic facies, four types of fracture facies and four types of pore structure facies were identified. Well log characterization methods and well-log identification standards were established. Petrophysical facies classification and reservoir quantitative evaluation standard were also put forward. The results show that high-quality reservoirs are mainly located in the favorable superposition of lithology and lithofacies, diagenetic facies,fracture facies and pore structure facies, which is favorable petrophysical facies area. High-quality reservoirs of the second member of Xujiahe Formation are mainly situated in relatively porous and permeable zone in the lower and middle part of the clinoform and fracture-developed zone in the northern part of the study area. The study of petrophysical facies has significant effect on reservoir characterization, high-quality reservoir prediction and evaluation.

Key words: depositional systems, sequence stratigraphy, Wenchang Formation, Lufeng Depression, Pearl River Mouth Basin

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