西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

川中下侏罗统大安寨组储层特征及控制因素

陈薇1,郝毅1,倪超1,朱吟1,2,厚刚福1   

  1. 1. 中国石油杭州地质研究院,浙江杭州310023
    2. 中国石油碳酸盐岩储集层重点实验室,浙江杭州310023
  • 出版日期:2013-10-20 发布日期:2013-10-20
  • 基金资助:

    中国石油重大科技专项课题(2012E–2601–02)。

Reservoir Characteristics and Controlling Factors of Da’anzhai
Member in Lower Jurassic,Central Sichuan

Chen Wei1, Hao Yi1, Ni Chao1, Zhu Yin1,2, Hou Gangfu1   

  1. 1. Hangzhou Institute of Geology,PetroChina,Hangzhou,Zhejiang 310023,China
    2. Key Laboratory of Carbonate Reservoir,CNPC,Hangzhou,Zhejiang 310023,China
  • Online:2013-10-20 Published:2013-10-20

摘要:

以钻井岩芯及露头剖面样品的镜下岩石学特征为基础,以大量薄片观察及全岩X 衍射、同位素分析、CT 扫描
等实验分析为依据,对四川盆地中部地区下侏罗统大安寨组储层进行了研究。认为大安寨段储集岩类型可以主要分
为结晶介壳灰岩及泥质–有机质介壳灰岩两大类。而储集空间主要有溶蚀孔、晶间隙、壳内溶孔、壳缘隙、壳间隙、介
壳微缝、层间缝、构造缝等。储层的发育主要受到沉积微相、成岩作用、溶蚀作用以及构造破裂作用等因素控制。其中
沉积微相是储层发育的物质基础,也是有利储层得以保存的条件;溶蚀作用及构造裂缝是储层改善的关键因素;而压
实、压溶、胶结、交代等成岩作用则对储层的发育是不利的。

关键词: 川中地区, 下侏罗统, 大安寨组, 储层特征, 控制因素

Abstract:

Based on the lithology characteristics of the drill cores,outcrops profile,and thin slice observation,X-diffraction,
isotopic analysis,CT-Scanning,and so on in the central of Sichuan Basin,we studied the reservoir of Da’anzhai Member
in lower Jurassic in the paper. The Da’anzhai Member could be divided into two main kinds of reservoir:crystallized shelly
limestone and argillaceous-organic shelly limestone. The main storage spaces include emposieu,intercrystalline gap,intra-shell
dissolved pore,periphery gap,inter-shell gap,shelly microfracture,interlamination fracture,tectonic fracture and so on. The
reservoir was controlled by sedimentary facies,diagenesis,denudation,tectonic disruption and so forth. Sedimentary facies
is the environment basements of reservoir;denudation and tectonic disruption are the key factors that the reservoir could be
improved;some diagenesis such as compaction,pressolution,cementation and metasomasis are disadvantages for the reservoir.

Key words: central Sichuan;lower Jurassic;Da&rsquo, anzhai Member;reservoir characteristics;controlling factors