松辽盆地南部孤店断陷火石岭组烃源岩评价及预测

烃源岩识别是油气有利目标预测的基础，对致密砂岩油气藏的钻探部署具有重要的指导作用。通过对松辽盆地南部孤店断陷深层烃源岩的有机质丰度、有机质类型和有机质成熟度进行评价，认为孤店断陷火石岭组烃源岩在有机地球化学特征上总体属于好烃源岩。生烃演化分析认为，火石岭组烃源岩处于生烃演化的过成熟阶段，主要生成以甲烷为主的天然气。结合岭深1井热演化史分析，火石岭组烃源岩属于有效烃源岩，是孤店断陷深层重要的天然气来源。对比单一利用三维地震资料、地震属性和波阻抗反演等方法进行烃源岩层识别的优缺点，提出运用波阻抗和瞬时相位相叠合的方法对烃源岩层进行识别更准确。运用此方法对孤店地区烃源岩层进行了精细解释和分析，预测了火石岭组烃源岩的分布范围。

The evaluation and prediction of source rocks in Huoshiling Formation of Gudian fault depression,south of Songliao Basin

Identification of source rocks provides a basis for predicting oil and gas favorable target, playing an important role in drilling deployment of tight sandstone reservoirs. Organic geochemical characteristics of deep source rocks in Gudian fault depression are evaluated on a basis of organic matter abundance, organic matter type and organic matter maturity. According to the organic geochemical characteristics, Huoshiling Formation is classified as favorable source rocks. The analysis of hydrocarbon generation and evolution shows that source rocks of Huoshiling Formation reach the post-mature phase and primarily produce methane gas. Based on analyzing the single-well thermal evolution history of Well Lingshen1, it is reflected that source rocks in Huoshiling Formation are effective source rocks, and also the important source of natural gas in Gudian fault depression. By comparing the advantages and disadvantages of source rock formation identified by single-use 3D seismic data, seismic attributes and wave impedance inversion methods, respectively, this study proposes that the superposed method of wave impedance and instantaneous phase is more accurate for identifying source rock formations. This method is used to finely explain and analyze the source rock layers in Gudian area, and predict the distribution range of source rocks in Huoshiling Formation.