川西新场须四段致密砂岩储层微观孔喉与可动流体变化特征

肖开华; 冯动军; 李秀鹏

doi:10.11781/sysydz201401077

川西新场须四段致密砂岩储层微观孔喉与可动流体变化特征

doi: 10.11781/sysydz201401077

中国石油化工股份有限公司石油勘探开发研究院, 北京 100083

基金项目: 中国石油化工股份有限公司科技项目“新场须四段致密气藏描述（P12109）”资助。

详细信息

作者简介:
肖开华（1963-），男，硕士，高级工程师，从事油气地质综合研究。E-mail：xiaokh.syky@sinopec.com。

中图分类号: TE132.2
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出版历程
- 收稿日期: 2013-09-25
- 修回日期: 2013-11-26
- 刊出日期: 2014-01-28

Micro pore and throat characteristics and moveable fluid variation of tight sandstone in 4th member of Xujiahe Formation, Xinchang Gas Field, western Sichuan Basin

SINOPEC Exploration and Production Research Institute, Beijing 100083, China

摘要

摘要: 为了评价川西新场须四段致密砂岩储层，应用恒速压汞及核磁共振实验方法对储层微观孔喉与可动流体变化特征进行定量分析。结果表明，须四段致密砂岩储层可动流体参数、喉道特征参数及孔隙参数变化幅度大。微裂隙发育的致密砂岩储层孔隙对可动流体参数的影响较喉道要更大一些，在微观上可动流体参数主要受孔隙控制。孔喉半径比较大、分布范围宽是致密砂岩储层可动流体含量低、可动用程度差的主要原因之一。微裂隙发育的致密砂岩储层具有喉道进汞饱和度较孔隙进汞饱和度高的特点，说明新场须四段致密砂岩储层的储集空间类型主要为孔隙—裂缝型。
- 可动流体参数 /
- 孔喉特征 /
- 核磁共振 /
- 恒速压汞 /
- 致密砂岩储层 /
- 川西
Abstract: In order to evaluate the tight sandstone reservoirs in the 4th member of the Xujiahe Formation in the Xinchang area of the western Sichuan Basin, nuclear magnetic resonance and constant-rate mercury intrusion experiments have been carried out to quantitatively analyze micro pore and throat and moveable fluid variation characteristics. Studies have indicated that the moveable fluid parameters, throat parameters and pore parameters of tight sandstones vary largely. In micro-fractured tight sandstones, pores have an advantage over throats affecting the moveable fluid parameters, and the moveable fluid parameters are mainly controlled by pores. Low moveable fluid content and low producing degree of tight sandstones are mainly caused by the relatively long radius and wide distribution of pores and throats. In micro-fractured tight sandstones, the mercury saturation in throats is higher than that in pores, indicating that the dominant type of reservoir space is pore-fracture type in the 4th member of the Xujiahe Formation, the Xinchang Gas Field.
- moveable fluid parameter /
- pore and throat characteristics /
- nuclear magnetic resonance /
- constant-rate mercury intrusion /
- tight sandstone reservoir /
- western Sichuan Basin

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