伊通地堑由南至北依次分布莫里青断陷、鹿乡断陷、岔路河断陷,是吉林探区勘探的重点区块。由于地理位置处在耕地集中地区,而且井间距多为一百多米,为了节约耕地和成本,所以本区块绝大多数井采用平台定向井的形式。同时由于该区块地质条件复杂,自上世纪八十年代中期开始钻探以来,经常出现定向钻进困难,轨迹难以控制,易掉块坍塌,造成井塌划眼,甚至出现报废的情况。因此对该地区的定向研究和井眼轨迹控制以及井壁稳定性的研究显得极为重要。 Yitong graben distributes the Moriqiang rift, Luxiang rift and Chaluhe rift from south to north in sequence, which is the key area for exploration in Jilin Exploration Area. Due to its geographical location in a concentrated area of ​​cultivated land and its well spacing of more than 100 meters, in order to save land and costs, most of the wells in this block are in the form of platform directional wells. At the same time, due to the complex geologic conditions of the block, directional drilling has often been difficult since the drilling started in the mid-1980s. It is difficult to control the trajectory and collapses easily, resulting in the collapse of the well and even the scrapped situation. Therefore, it is very important to study the directional research, well trajectory control and wellbore stability in this area.