摘要
压汞曲线在双对数坐标系中近似于双曲线。其顶点处的孔喉半径（r顶点）代表了岩石内部连通成有效孔隙系统时的孔喉半径。顶点位置与优势孔喉分布区间相对应。因此，r顶点可以作为反映储集层孔隙结构的重要参数。r顶点用于评价储集层和判定油气聚集有利部位十分有效。r顶点值越大，储集层越好，反之，储集层越差。r顶点值大于0．5μm的储集层厚度越大，对油气聚集越有利；r顶点值小于0．5μm或无顶点，则储集层聚集油气的可能性很小。该参数在我国某气田碳酸盐岩储集层研究中应用，效果明显，值得在碳酸盐岩地区以及砂岩地区储集层研究中推广。
Many parameters have been gotten from mercury injection curves to describe the character of reservoir pore structure. In thispaper, it is discussed how to get rapex (a new important parameter about reservoir pore structure) from mercury injectioncapillary pressure data. The physical meaning of rapex indicates the throat radium of a pore system with good internalconnection and continuity formed when mercury is injected into rock sample. rapex is also used in a gas field to evaluatereservoir property and hydrocarbon accumulation position, its effect is very well. Larger the rapex is, better the reservoir is,vice versa. The thicker is the reservoir with radex larger than 0. 5μin, the more favorable is it for oil and gas accumulation. rapexless than 0. 5μm or no apex means little possibility of oil and gas accumulation in the reservoir. This parameter has beedsuccessfully applied in a gas field for carbonate reservoir study, and is worth spreading in sandstone reservoir study.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1997年第3期78-81,共4页
Petroleum Exploration and Development
关键词
孔隙结构
参数
储集层
碳酸盐岩
油气聚集
Pore structure, Parameter, Reservoir, Carbonate rock, Oil and gas accumulating
