常规压汞-恒速压汞联合曲线构型模式及其指示意义  

Configuration Pattern of Combined Conventional Mercury Intrusion-Constant Rate Mercury Intrusion Curves and Its Indicative Significance

作　　者：代金友[1] 雷禧桢 皮莎 沈小述 陈代欣 DAI Jinyou;LEI Xizhen;PI Sha;SHEN Xiaoshu;CHEN Daixin(School of Petroleum Engineering,China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249

出　　处：《新疆石油地质》2024年第6期735-741,共7页Xinjiang Petroleum Geology

基　　金：国家科技重大专项(2017ZX05035004)。

摘　　要：利用构型理论和层次分析方法,对常规压汞-恒速压汞联合曲线构型形貌进行划分,建立具有普遍意义的常规压汞-恒速压汞联合曲线三段式构型模式,探讨了该模式对岩石孔喉体系及其润湿滞后特性的指示意义。结果表明:常规压汞-恒速压汞联合曲线由a、b和c构型段组成,各构型段相互衔接,形貌各异;a构型段呈重叠形貌,指示了大孔喉体系,常规压汞-恒速压汞联合曲线无润湿滞后特性;b构型段呈分离形貌,可细分为b_(1)和b_(2)构型亚段,b_(1)构型亚段指示了中孔喉体系,恒速压汞曲线无润湿滞后特性,常规压汞曲线有润湿滞后特性,b_(2)构型亚段指示了中孔喉体系,常规压汞-恒速压汞联合曲线关联润湿滞后特性;c构型段呈重叠形貌,指示了小孔喉体系,常规压汞-恒速压汞联合曲线具有同等润湿滞后特性;常规压汞汞弯液面变形集中于b—c构型段,恒速压汞汞弯液面变形集中于b_(2)构型亚段—c构型段;常规压汞曲线和恒速压汞曲线的b_(1)构型亚段可用于接触角校正。常规压汞-恒速压汞联合曲线的三段式构型模式,对分段接触角校正及表征岩石孔喉分布具有重要指导意义。Based on the configuration theory and the analytic hierarchy process(AHP),the configuration shapes of the combined conventional mercury intrusion-constant rate mercury intrusion(CMI-CRMI)curves were classified,and a universal three⁃segment configuration pattern for the curves was established.The indicative significance of this pattern to the pore⁃throat systems and their wetting hysteresis was clarified.The results show that the combined CMI-CRMI curves consist of three configuration segments:a,b,and c,which are interconnected but exhibit distinct shapes.The segment a displays an overlapping shape,indicative of a macro⁃pore⁃throat system,where the combined CMI-CRMI curve shows no wetting hysteresis.The segment b demonstrates a separated shape and can be subdivided into subsegments b_(1) and b_(2).Subsegment b_(1) indicates a meso⁃pore⁃throat system,where the CRMI intrusion curve shows no wetting hysteresis,but the CMI curve does.Subsegment b_(2) also indicates a meso⁃pore⁃throat system,where the combined CMI-CRMI curve shows wetting hysteresis.The segment c exhibits an overlapping shape,representing a micro⁃pore⁃throat system,where both the CMI and CRMI curves exhibit equal wetting hysteresis.The deformation of the mercury meniscus during CMI is concentrated in the segments b and c,while the deformation of the mercury meniscus during CRMI is concentrated in the segments b_(2) and c.Subsegment b_(1) in both the CMI and CRMI curves can be used for contact angle correction.This three⁃segment configuration pattern of the combined CMI-CRMI curves provides a significant guidance for segmental contact angle correction and pore⁃throat distribution characterization.

关 键 词：常规压汞 恒速压汞 毛细管压力曲线 构型模式 孔喉体系 润湿滞后 

分 类 号：TE125.1[石油与天然气工程—油气勘探]