透镜状“水包油”特殊岩性油藏  

A special lenticular “oil in water” lithologic reservoir.

作　　者：邢正岩[1] 陶国秀[1] 许坚[1] 

机构地区：[1]胜利石油管理局地质科学研究院

出　　处：《石油勘探与开发》2000年第6期58-59,共2页Petroleum Exploration and Development

摘　　要：透镜状“水包油”油藏是在储集层非均质严重的地区常见的一种油藏类型。造成“水包油”现象的主要原因是在沉积过程中储集层岩性有一定变化 ,经成岩演化后储集层物性也有一定差异。油气运移过程中 ,由于毛细管力的作用 ,孔喉半径大、渗透性好的生物灰岩中的水容易被排替 ,形成油层 ;而孔喉半径小、渗透性差的生物灰岩中的水不易被排替 ,形成水层。对该类油藏需要进行精细地层对比 ,并根据岩心、录井、试油、试采及电测井资料综合判断油水层。在射孔时应有选择地射开厚度较大、物性较好的层 ,避射物性差的层段 ,使该类难动用储量能得以开发动用。图 1参 2 (邢正岩摘 )A lenticular oil-in-water reservoir is a type of reservoir that occurs commonly in a strong heterogeneous area. The main reasons for this are that the lithology changes in the process of deposition and that the petrophysical properties vary after diagenesis. During the process of petroleum migration, the water exists in the large pore throat and good permeable biogenic limestone is easily displaced due to capillary forces, thus, oil-bed is formed; while, water-bed is formed in the small pore throat and low permeable biogenic limestone for water is difficult to displace. As for this type of reservoir, oil-bed or water-bed is determined by the combination of fine stratigraphic correlation, coring data, geological logging data, oil test, pilot production, and electric log data. In order to develop the difficult producing reserves, interval of big thickness and good petrophysical properties should be taken into consideration preferably in the process of perforation, but the interval of poor petrophysical properties should be avoided.

关 键 词：郑家油田 油藏类型 透镜状 “水包油”岩性油藏 

分 类 号：TE122.32[石油与天然气工程—油气勘探] P618.130.2[天文地球—矿床学]