石油与天然气地质 ›› 2009, Vol. 30 ›› Issue (6): 713-719.doi: 10.11743/ogg20090607

• 油气地质 • 上一篇    下一篇

四川盆地中西部须家河组储层特征与主控因素

冯明石1,2, 刘家铎1,2, 孟万斌1,2, 王峻1,2, 张翔2, 冯艳红2   

  1. 1. 成都理工大学, 油气藏地质及开发工程国家重点实验室, 四川, 成都, 610059;
    2. 成都理工大学, 沉积地质研究院, 四川, 成都, 610059
  • 收稿日期:2009-10-10 出版日期:2009-12-25 发布日期:2012-01-16

Characteristics and major controlling factors of reservoirs in the Xujiahe Formation of the central and western Sichuan Basin

Feng Mingshi1,2, Liu Jiaduo1,2, Meng Wanbin1,2, Wang Jun1,2, Zhang Xiang2, Feng Yanhong2   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China;
    2. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, Sichuan 610059, China
  • Received:2009-10-10 Online:2009-12-25 Published:2012-01-16

PDF (PC)

885

被引次数

60

摘要：

运用铸体薄片镜下观察、物性分析、扫描电镜及X-衍射等分析手段,对四川盆地中西部须家河组的储层特征、沉积作用和成岩作用进行了研究。结果表明,研究区须家河组储层孔隙类型以残余原生粒间孔和粒内溶孔为主,平均孔隙度为5.83%,平均渗透率为0.283×10-3μm2,为低孔-低渗型储层;控制储层发育的主要因素是沉积作用和成岩作用。三角洲前缘河口坝和水下分流河道沉积微相是储层发育的有利相带。压实作用是导致储层孔隙损失的主要因素,溶蚀作用是对储层发育贡献最大的建设性成岩作用,早期绿泥石环边胶结作用有利于保护剩余原生粒间孔隙。

关键词: 储层特征, 沉积作用, 成岩作用, 须家河组, 四川盆地

Abstract:

In this paper,reservoir characteristics,sedimentation and diagenesis of the Xujiahe Formation in the central and western parts of the Sichuan Basin are studied through microscopy observation of cast thin sections,analysis of physical properties,scanning electron microscope and X-diffraction.The results show that pores in the Xujiahe Formation of the study area are mainly residual primary intergranular pores and intragranular dissolution pores.With an average porosity of 5.83% and average permeability of 0.283×10-3μm2,the reservoirs are classified as low-porosity and low-permeability reservoirs.Sedimentation and diagenesis are the main factors controlling the development of reservoirs.Favorable facies belts for the development of reservoirs are river mouth bar and underwater distributary channel microfacies in the delta front.Compaction is the main influencing factor which led to the loss of porosity in the reservoirs.Early rim cementation of chlorites helped to protect the residual primary intergranular pores,and dissolution contributed the most to the development of reservoirs.

Key words: reservoir characteristics, sedimentation, diagenesis, Xujiahe Formation, Sichuan Basin

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