|本期目录/Table of Contents|

[1]吴丽荣,黄成刚,袁剑英,等.咸化湖盆混积岩中双重孔隙介质及其油气储集意义[J].地球科学与环境学报,2015,37(02):59-67.
　WU Li-rong,HUANG Cheng-gang,YUAN Jian-ying,et al.Double-porosity System of Mixed Sediments in Saline Lacustrine Basin and Its Significance to Reservoir[J].Journal of Earth Sciences and Environment,2015,37(02):59-67.
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咸化湖盆混积岩中双重孔隙介质及其油气储集意义(PDF)
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第37卷
期数:
2015年第02期
页码:
59-67
栏目:
基础地质与矿产地质
出版日期:
2015-03-15

文章信息/Info

Title:
Double-porosity System of Mixed Sediments in Saline Lacustrine Basin and Its Significance to Reservoir
文章编号:
1672-6561(2015)02-0059-09
作者:
吴丽荣; 黄成刚; 袁剑英; 曹正林; 万传治; 潘星; 张世铭; 李智勇
1. 中国石油勘探开发研究院西北分院 油藏描述重点实验室，甘肃 兰州 730020; 2. 兰州大学 地质科学与矿产资源学院，甘肃 兰州 730000
Author(s):
WU Li-rong;  HUANG Cheng-gang;  YUAN Jian-ying;  CAO Zheng-lin;  WAN Chuan-zhi;  PAN Xing;  ZHANG Shi-ming;  LI Zhi-yong
1. Key Laboratory of Reservoir Description, Northwest Branch of PetroChina Research Institute of Petroleum Exploration and Development, Lanzhou 730020, Gansu, China; 2. School of Earth Sciences, Lanzhou University, Lanzhou 730000, Gansu, China
关键词:
咸化湖盆; 混积岩; 裂缝; 溶蚀孔; 晶间孔; 盐间缝; 准同生交代; 柴达木盆地
Keywords:
saline lacustrine basin;  mixed sediment;  fracture;  dissolution pore;  intergranular pore;  crack between the salts;  penecontemporaneous metasomatism;  Qaidam Basin
分类号:
P618.130.2；TE122
DOI:
-
文献标志码:
A
摘要:
柴达木盆地英西地区始新统下干柴沟组为咸化湖盆沉积的混积岩，其组分包括湖相碳酸盐、碎屑颗粒、泥质等，且岩石中含较多的盐类矿物。通过岩芯观察、物性分析、毛管压力测试、成像测井和场发射扫描电镜研究发现，混积岩具有双重孔隙介质，一类为孔径较大的裂缝和盐类矿物溶蚀孔，另一类为孔径较小的盐间缝和白云石晶间孔，共同构成了毛管压力曲线上的“低窄高宽的双平台”结构，岩石物性整体上较差，以“低孔—特低渗”为主，孔喉普遍较细。电子探针微区成分分析结果表明，白云石元素组成具有“高铝硅低铁锰”的地球化学特征，FeO平均质量分数为1.322%，MnO平均质量分数为0.060%，明显低于热液白云岩中的铁锰质量分数，为准同生交代成因的典型特征。白云石化过程中产生了大量收缩晶间孔，这类基质孔隙储油是支撑英西地区持续稳产的重要因素。
Abstract:
The Lower Ganchaigou Formation of Eocene in Yingxi area of Qaidam Basin is mixed sediments in saline lacustrine basin. It consists of lacustrine carbonate, detrital material and mud, and all the rocks contain many salt minerals. Based on core observation, physical property analysis, capillary pressure test, imaging logging and field emission scanning electron microscopy data, the mixed sediments contain double-porosity system. One is fracture and salt mineral dissolution pore with big pore radius, another one is crack between the salt and dolomite intergranular pore with small pore radius. The two types of pores build the “narrow lower-wide higher double-platform” structure on the capillary pressure curves. On the whole, the physical property of the rock is very poor with the characteristics of “low porosity-ultra low permeability”. The pores and throats of the rock are generally fine. Electron microprobe analysis shows that the element composition of dolomite has the geochemical characteristics of “high contents of silicon and aluminum content, and low contents of iron and manganese”. The average mass fractions of FeO and MnO in the dolomicrite are 1.322% and 0.060%, which are obviously lower than that of Fe and Mn in the hydrothermal dolomite. It is considered that the dolomicrite has a penecontemporaneous metasomatic formation mechanism. A large number of shrinkage intergranular pores are produced during the dolomitization process. This kind of matrix pore as the storage space is an important support factor of sustained and stable production of oil and gas in Yingxi area of Qaidam Basin.

参考文献/References:

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相似文献/References:

[1]黄成刚,袁剑英,曹正林,等.咸化湖盆中酸性流体对碎屑岩储层的改造作用[J].地球科学与环境学报,2014,36(03):52.
　HUANG Cheng-gang,YUAN Jian-ying,CAO Zheng-lin,et al.Reconstruction of Acid Fluid on Clastic Reservoir in Saline Lacustrine Basin[J].Journal of Earth Sciences and Environment,2014,36(02):52.
[2]吴丽荣,黄成刚,袁剑英,等.咸化湖盆高效基岩气藏储层中基质孔隙的发现及意义[J].地球科学与环境学报,2015,37(04):54.
　WU Li-rong,HUANG Cheng-gang,YUAN Jian-ying,et al.Discovery of Matrix Pore of High Efficiency Bedrock Gas Reservoir in Saline Basin and Its Significance[J].Journal of Earth Sciences and Environment,2015,37(02):54.

备注/Memo

备注/Memo:
收稿日期:2014-11-26
基金项目:国家科技重大专项项目(2011ZX05003);中国石油重大科技专项项目(2011E-03)
作者简介:吴丽荣(1979-),女,湖北黄梅人,工程师,E-mail:48081838@qq.com。
更新日期/Last Update: 2015-04-02