西南石油大学学报(自然科学版) ›› 2010, Vol. 32 ›› Issue (5): 65-69.DOI: 10.3863/j.issn.1674-5086.2010.05.010

• 地质勘探 • 上一篇    下一篇

隆昌北须二段致密砂岩储层特征及主控因素

何 琰,彭 军



  

  1. 西南石油大学资源与环境学院,四川 成都 610500
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-10-20 发布日期:2010-10-20

THE RESERVOIR CHARACTERISTICS AND MAIN CONTROL FACTORS OF THE SECOND MEMBER OF XUJIAHE FORMATION IN NORTH LONGCHANG

HE Yan,PENG Jun   

  1. School of Resource and Environment,Southwest Petroleum University,Chengdu Sichuan 610500,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-10-20 Published:2010-10-20

摘要:

隆昌北须二段储层以中—细粒岩屑长石砂岩、长石岩屑砂岩为主,分选中—好,磨圆度中等,多为次圆—次棱角状,以次棱角状为主。颗粒间以点—线接触为主,局部呈线接触、点接触、凹凸接触;以孔隙—接触式、加大—孔隙式胶结为主。粒间孔和长石溶孔是主要的储集空间,渗透率平均为1.2733mD,属特低渗致密储层。沉积相带、矿物成分、砂岩粒度是影响该区储层性质的关键因素。压实作用和胶结作用是孔、渗降低的主要原因,溶蚀作用和构造作用形成裂缝,是储集物性改善的主要因素。

关键词: 隆昌北, 须家河组, 致密砂岩, 储层特征, 储层物性, 控制因素

Abstract:

JOURNAL OF SOUTHWEST PETROLEUM UNIVERSITY(SCIENCE & TECHNOLOGY EDITION),VOL.32,NO.5,65-69,2010(ISSN 1674-5086,in Chinese)
Abstract:Medium-fine arkose-lithic and lithic-arkose are mainly sandstones of 2nd Member,Xujiahe Formation in Baojie Area.The roundness which is subround/subangle is medium.There are line and point-line and concave-convex contact forms which are pore-contact and overgrow-pore cementation among rock grains.The Xujiahe reservoir is characterized by low component maturity and textural maturity.The main pore types are granular pore and secondary feldspar-dissolution pore.The Xujiahe reservoirs are super low permeability with mean permeability of 1.2733mD.The sedimentary facies,mineral composition and grain diameter of the sandstones are the key factors influencing the reservoir formation and evolution.Furthermore,the strong compaction and cementation are the main factors resulting in the low porosity and low permeability of the reservoir,while dissolution and tectonic action are the main factor improving the physical property.

Key words: North Longchang, Xujiahe formation, tight sandstone, reservoir characteristic, reservoir physical property, control factor

中图分类号: