新疆石油地质

新疆石油地质 ›› 1991, Vol. 12 ›› Issue (2): 173-179.

• • 上一篇    

台3—北10井区侏罗系贫石英砂岩的成岩作用及储层特征研究

关维东, 李兴训   

  1. 新疆石油管理局勘探开发研究院
  • 收稿日期:1990-11-07 发布日期:2020-05-27

A STUDY OF RESERVOIR CHARACTERISTICS AND DIAGENESIS OF QUARTZ—POOR SANDSTONE OF JURASSIC IN THE AREAS OF TAI3—BEI10 WELLS

Guan Weidong, Li Xingxun   

  1. Research Institute of Exploration and Development,Xinjiang Petroleum Adminstration Bureau
  • Received:1990-11-07 Published:2020-05-27

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摘要： 准噶尔盆地东部台3—北10井区侏罗系储层的储集性能为中等容量的储层。但在开发过程中往往表现出渗滤能力极差以及油层损害、井底出砂严重等现象。造成这一现象的原因除了地层异常高压外,贫石英砂岩粘土矿物的相互转化及蒙脱石受压释放出层间水等是其根本原因。贫石英砂岩的成岩作用使缩小了的原生孔隙得以再扩大。溶蚀孔(缝)的发育程度主要受控于储集岩体在地表或近地表地带接受风化淋滤的时间长短、范围大小等,埋藏深度的影响是次要的。次生孔隙发育带主要分布在不整合面以下的河道砂岩中。成岩作用对高含粘土矿物的贫石英砂岩既有有利的一面,也有不利的一面。

关键词: 贫石英砂岩, 成岩作用, 储层特征

Abstract: The Jurassic formation in the area of Tai3—Bei 10 wells at cast Junggar fiasin is a reservoir of moderate storati- vity. The phenomena often occur such as poor permeablility , formation damage and serious sand production at the well bores during development. The radical reasons arc,besides abnormally high formation pressure,intertransformation of clay minerals and interstitial water release from smectite pressurization in the quartz—poor sandstone. Diagenesis of quartz—poor sandstone enlarges reduced primary pore volume. The degree of solution pore volume development is mainly a function of time and area of erosion and leach at(aiid near)the surface,with burial depth being the next important factor. Development zone of secondary pore is basically distributed in the channel sandstones under unconformily. Diagenesis has both favorable and unfavorable effects for quartz—poor sandstone of high clay mineral content.

Key words: Quartz-poor sandstone, Diagenesis, Reservoir characteristics