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查干诺尔凹陷是海拉尔盆地西南部的一个二级负向构造单元。查干诺尔凹陷的主要烃源岩是南屯组和大磨拐河组的泥岩。凹陷内广泛分布铜钵庙组、南屯组和大磨拐河组3套储集层。伊敏组泥岩是区域性盖层,大磨拐河组和南屯组泥岩是局部盖层。断块、断鼻和地层超覆等油藏类型较为发育。东部断阶带的中南段、西部斜坡与中央凹陷过渡带的中南段是有利勘探区带。
The Chaganuoer Sag is a secondary negative tectonic unit in the southwestern Hailar Basin. The main source rocks of Chaganuoer Sag are mudstones of Nantun Formation and Damoguaihe Formation. The depression is widely distributed Tongbomiao group, Nantun Formation and Damoguai 3 sets of reservoirs. Yimin mudstone is a regional cap rock, Damoguaihe Formation and Nantun Formation mudstone is a partial cap layer. Reservoirs such as fault block, nose breaking and overburden strata are more developed. The middle-south section of the eastern fault-step belt and the middle-south section of the transitional zone between the western slope and the central depression are favorable exploration zones.