漠河盆地北部中侏罗统烃源岩有机质评价

通过漠河盆地北部油气地质调查，圈出了与油气形成密切相关的烃源岩层（含炭泥岩）的分布范围，为下一步寻找油气资源提供了靶区。研究表明：漠河盆地烃源岩类型为黑色泥岩，烃源岩w（TOC）为0.20%~30.30%。圈出26处烃源岩区，面积134.69 km²。烃源岩样品的最高热解温度（T_max）平均值为442℃，烃源岩演化处于成熟-过成熟阶段。漠河盆地西北部的成烃地质条件：中侏罗统沉积岩系为油气储藏提供了良好的空间和气源；中生代岩浆活动及韧性剪切作用为烃源岩成气作用提供了良好的温度条件；张性断裂、裂隙和碎裂岩化构造为油气运移和储存提供了运移通道和储存空间。

Organic Matter Evaluation of Source Rocks in Middle Jurassic Northern Mohe Basin

Based on the investigation of petroleum geology in the northern Mohe basin, we determined the distribution range of hydrocarbon source rocks (including carbonaceous mudstone) closely related to the formation of oil and gas, which provide a target area for the next step to find oil and gas resources. The results show that the source rocks in Mohe basin are black mudstones with total organic carbon w(TOC) of 0.20%-30.30%. We delineated 26 source rock areas of 134.69 km². The pyrolysis T_max (℃) average value of hydrocarbon source rocks is 442℃, indicating that the evolution of source rock is in the mature-over mature stage. Through the analysis of the hydrocarbon geological conditions in the northwest of Mohe basin, the Middle Jurassic sedimentary rocks provide a good space for oil and gas storage; the Mesozoic magmatic activities and ductile shearing provide a suitable temperature for oil and gas formation; the extensional faults, fissures and cataclastic structures provide migration channels and storage space for oil and gas migration and storage.