胜利油田过去用的S—907取心工具,只适用于软地层。近年来,由于取心层位加深,地层变硬,岩心收获率降低。如在新纯85井取心,井段为2572.00～2624.83米,岩性为灰质砂岩,用S—907工具取心12筒,进尺52.83米,岩心长29.62米,收获率只有56.15%。分析 Shengli Oilfield S-907 used in the past coring tools, only applies to soft formations. In recent years, due to the deepening of the coring horizon, the formation hardens and the core yield decreases. For example, the well of Xinchun-85 is coring, well section is 2572.00 ~ 2624.83 meters, lithology is gray sandstone, and 12 tubes are taken with S-907 tool, the footage is 52.83 meters long, the core length is 29.62 meters and the harvesting rate is only 56.15%. analysis