石油与天然气地质 ›› 1994, Vol. 15 ›› Issue (3): 248-256.doi: 10.11743/ogg19940309

• 论文 • 上一篇    下一篇

潜江凹陷新沟咀组三油组成岩作用对孔隙结构的影响

吴光红, 姚小明   

  1. 江汉油田勘探开发研究院, 湖北潜江433124
  • 收稿日期:1991-10-22 修回日期:1994-07-06 出版日期:1994-09-25 发布日期:2012-01-16

EFFECT OF DIAGENESIS ON PORE STRUCTURE OF THIRD OIL LAYER IN XINGOUZUI FORMATION,QIANJIANG

Wu Guanghong, Yao Xiaoming   

  1. Research Institute of Petroleum Exploration and Development, Jianghan Oilfield
  • Received:1991-10-22 Revised:1994-07-06 Online:1994-09-25 Published:2012-01-16

PDF (PC)

491

被引次数

5

摘要：

成岩作用明显地改变了本区砂岩孔隙结构.压实作用和胶结作用使孔隙由大变小,成为微孔隙、晶间孔隙,使喉道由粗变细,成为片状与管束状,从而使砂岩许多孔喉变为非渗流孔喉,储油物性和生产能力降低;而溶蚀作用则相反,使孔隙由小变大,喉道由细变粗,微孔隙、晶间孔隙变为大孔隙,片状、管束状喉道变为粗喉道,多数砂岩孔喉就是渗流孔喉,储油物性和生产能力增大.

关键词: 成岩作用, 孔隙结构, 砂岩, 新沟咀组, 拖市地区

Abstract:

The effect of diagenesis on pore structure of sandstones in third oil layer of Xingouzui Formation in Tuoshi area,Qianjiang Depression is discussed in this paper.The compaction and cementation decreased the pore throat and pore radius of the sandstones in different degrees,and caused the pores to disintegrate into micropores and intercrystal pores,the throats into schistose throats and tubebundle throats in sandstones.The dissolution increased the pore throat and pore radius of sandstones,turned the pores into coarse ones and tubular throat.The compaction resulted in better pore sorting,but the cementation and dissolution made it more complicated.In sandstones of compaction type and cemetation type,the permeability contributed peak position is inconsistent with that of the pore distribution peak position,and their permeability for air is usually less than 1 thousandth of square micron and devoted by few pore spaces with radius bigger than 8 micron.In sandstones of dissolution type,the permeability devoted peak position is usually consistent with that of the pore distribution,thus the main pore spaces of the sandstones are vadose pores.