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。
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 ex-periments have been carried out to quantitatively analyze micro pore and throat and moveable fluid variation char-acteristics. 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.
出处
《石油实验地质》
CAS
CSCD
北大核心
2014年第1期77-82,共6页
Petroleum Geology & Experiment
基金
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
关键词
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
moveable fluid parameter
pore and throat characteristics
nuclear magnetic resonance
constant-rate mercury intrusion
tight sandstone reservoir
western Sichuan Basin
