密闭取心技术在西江24-3油田的应用

Application of Closed Coring Technology in Xijiang 24-3 Oilfield

为了进行剩余油分布分析等地质研究,进一步认识储层驱油效率,对部署在西江24-3油田的一口开发井进行密闭取心。在H3G、H6A、H6B、H11、H13共5个层位进行密闭取心并进行相应的化验分析。取心井段为12-1/4″(311.15 mm)井眼,使用的密闭取心工具能够获取直径为120 mm的密闭岩心,优良的工具结构能够保证密闭率。密闭取心共计9次,总进尺78.94 m,岩心总长75.31 m,岩心平均收获率95.40%,密闭取心密闭率94.3%。

In order to carry out geological research such as residual oil distribution analysis and further understand the oil displacement efficiency of the reservoir,a closed coring was carried out for a development well deployed in Xijiang 24-3 oilfield.Conduct closed coring and corresponding laboratory analysis at five layers of h3 g,h6 a,h6 b,H11 and H13.The coring section is12-1/4"(311.15 mm)borehole.The closed coring tool used this time can obtain a closed core with a diameter of 120 mm,and the excellent tool structure can ensure the sealing rate.The well has been coring 9 times in total,with a total footage of 78.94 m and a total core length of 75.31 m.The average core recovery rate is 95.40%and the sealing rate of closed coring is 94.3%.