第3期
第29卷 2015年6月
现代地质 GEOSCIENCE
Veol. 29
Na3 Jun.2015
四川盆地西南部雷口坡组储层特征及控制因素
丁熊1,2.3，谭秀成13，李凌"，田景春，杜本强4
（1.西南石油大学地球科学与技术学院，四川成都610500；2.成都理工大学博士后流动站，四川成都
610059;
3.西南石油大学油气激地质及开发工程国家重点实验室，四川成都610500； 4.中国石油西南油气田公司蜀南气矿勘探开发研究所，四川泸州646001）
摘要：四川盆地西南部中三叠统雷口坡组气藏主要的储层类型为碳酸盐颗粒滩储层。其主要发育两种储渗形式：砂屑云岩储层以残余粒间孔和粒间溶孔为储集空间，喉道以缩颈喉道和管束状喉道为主，孔喉配置关系较好，储层多表现为中孔中渗的特征；缅粒灰岩储层和残余生屑云岩储层以粒内溶孔、铸模孔和生物体腔孔为储集空间，喉道欠发育，储层多表现为中孔、渗透率偏低的特征。进一步对储层的控制因索分析表明，颗粒滩为储层提供了早期的物质来源；单难体的厚薄控制着储层的储渗形式；原生粒间孔的保存和同生期大气淡水淋溶作用分别是形成这两种储渗形式的颗粒滩储层的关键。
关键词：颗粒滩；储层特征；控制因素；雷口坡组；四川盆地西南部
文章编号：10008527(2015)03064409
中图分类号：TE122.2
文献标志码：A
Characteristics and Dominating Factors of Reservoirs inLeikoupo
Formation,SouthwestSichuanBasin
DING Xiong'-2.3, TAN Xiu-cheng', LI Ling', TIAN Jing-chun, DU Ben-qiang(1. School of Geosciences and Technology, Southawest Petroleum Unitersity, Chengdu, Sichuan610500, China;
2. Past-Doctor Station, Chengdu Urisersity of Technology, Chengdu, Sichuan610059, China;
3. State Key Laboratory of Oil and Gos Resersoir Geology and Exploitation, Souzhaest Petroleum Unisersity, Chengdu, Sichuan 610500, China; 4, Sha'nan Gas Field Exploration and Deselopment Inutitute of PetroChina Southsent Oil & Gas Field Company, Lazhotr, Sichuan646001, China)
Abstract: On the basis of comprehensive analysis of drilling, logging and core data, it is considered that carbon-ate reservoir of grain shoal is an important reservoir type in Leikoupo Formation, Middle Triassic, southwest Si-chuan Basin. The reservoir types of two different patterns of porosity and permeability have been mainly devel-oped: (1) Dolarenite reservoirs are dominated by residual intergranular pores and intergranular dissolved pores in the reservoir space, and are possessed of well developed throats with neck down and shaped tube, and are charac-terized by the good reservoir capability with medium porosity and permeability; (2) Oolitic limestone and residual bioclastic dolomite reservoirs are dominated by isolated intragranular dissolved, moldic and organisms pores in the reservoir space, and are possessed of less developed throats which mainly are miniature in the dimension, and manifest,as medium porosity and low permeability. Analysis to the controlling factors of these reservoirs suggests as follows : (1) Grain shoals lay the foundation to the reservoir; (2) Reservoir pattem is controlled by the thickness of a single shoal ; (3)The preservation of primary intergranular pores is the key to dolarenite reservoirs, while syndi-agenetic meteoric leaching is crucial to reservoirs of oolitic limestones and residual bioclastic dolomites.
Key words: grain shoal; reservoir characteristics; controlling factor; Leikoupo Formation; southwest Sichuan Basin
收稿日期：2014-10-21；改回日期：2014-12-17；责任编辑：孙义梅。
基金项目：四川省教育厅科研基金项目（14ZB0058）；四川省矿产替查与勘探重点学科建设项目（SZD0414）。
作者简介：丁熊，男，博士，讲师，1981年出生，沉积学专业，主要从事储层沉积地质、数学地质等方面的教学和科研工作。
Email;dingxiong_2007@126.come