哈萨克斯坦国家石油运输商KazTransOil：上半年通过阿特劳-萨马拉管道的原油出口增加了4%，达到510万吨。

Group 1 - The core point of the article is that KazTransOil, the national oil transporter of Kazakhstan, has increased its crude oil exports through the Atyrau-Samara pipeline by 4% in the first half of the year, reaching 5.1 million tons [1] Group 2 - The increase in exports indicates a positive trend in the oil transportation sector in Kazakhstan, reflecting potential growth opportunities for the industry [1] - The Atyrau-Samara pipeline plays a crucial role in facilitating Kazakhstan's crude oil exports, highlighting its importance in the regional oil supply chain [1] - The reported figures suggest that KazTransOil is effectively managing its operations to enhance export capacity, which may attract further investments in the sector [1]