新疆石油地质

新疆石油地质 ›› 2007, Vol. 28 ›› Issue (3): 300-303.

• 油气勘探 • 上一篇    下一篇

羌塘盆地侏罗系碳酸盐岩储集层特征

许建华1, 吕树新2   

  1. 1.中国科学院 地质与地球物理研究所, 北京 100029;
    2 中国石油 辽河油田分公司, 辽宁 锦州 121209
  • 收稿日期:2006-07-25 修回日期:2006-10-21 出版日期:2007-06-01 发布日期:2020-07-31
  • 作者简介:许建华(1972-), 男, 山东东营人, 在读博士研究生, 石油地质,(Tel) 010-62007916.
  • 基金资助:
    中国石油天然气集团公司“九五”科技攻关项目(970204-04-02)资助

The Carbonate Reservoir Rocks of Jurassic in Qiangtang Basin

XU Jian-hua1, LV Shu-xin2   

  1. 1. Institute of Geology and Geophysics, CAS, Beijing 100029, China;
    2. Liaohe Oilfield Company, PetroChina, Jinzhou, Liaoning 121209, China
  • Received:2006-07-25 Revised:2006-10-21 Online:2007-06-01 Published:2020-07-31

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摘要： 在野外露头资料研究的基础上,运用岩石薄片、铸体薄片、扫描电镜、常规物性、毛细管压力曲线等手段,对羌塘盆地侏罗系碳酸盐岩储集层的岩石学、孔渗性及孔隙结构等特征作了详细研究。岩石类型主要为颗粒灰岩,包括内碎屑灰岩、鲕粒灰岩和生屑灰岩。储集空间包括孔隙和裂缝两种,孔隙主要为次生溶孔,裂缝为构造缝和溶蚀缝。孔隙的微观结构较差,基本上属于低孔低渗致密储集层。强烈的机械压实作用、胶结作用是导致储集层孔隙结构变差的主要因素,后期的溶解作用对储集层物性有一定的改善。构造作用使得岩石中裂隙发育,提高了岩石孔渗性,极大地改善了岩石的储集性能。

关键词: 羌塘盆地, 侏罗系, 碳酸盐岩, 储集层特征

Abstract: Based on the outcrop data, using such analytical techniques as rock thin section, cast section, SEM, conventional petrophysical property and capillary pressure curve, etc., the detailed studies are made in lithology, porosity-permeability distribution and pore structure. The carbonate reservoir rocks are dominated by granule limestone, including intraclast limestone, oolith limestone and bioclast limestone. The type of reservoir space includes pore (secondary solution pore) and fracture/fissure (structural fracture and solution fissure), with poor microstructure, belonging to a dense reservoir with low porosity and low permeability. The main factors are strong compaction and cementation. The late solution acted as a certain improvement on the reservoir quality. The tectonic action creates the fractures or fissures, increases the porosity/permeability of carbonate rocks and greatly improves the reservoir capacity in Qiangtang basin.

Key words: Qiangtang basin, Jurassic, carbonate rock, reservoir character

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