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位于松辽盆地中南部的长岭断陷深层火成岩发育,钻井证实该含气断陷在火成岩储集层段具有较大的勘探潜力。但由于火成岩储层岩性变化大、相变快、非均质性极强,成藏条件十分复杂,使得深层火成岩的勘探难度非常大。尤其是在储层物性及含气性预测方面,目前还无法形成成熟有效的技术手段。研究中尝试引入Spectra频谱衰减预测技术,利用检测目的层围岩的频谱衰减特征来预测目的层储层的物性及含油气状况。将该技术应用到长岭断陷地区深层火成岩储层预测研究中,利用已知井模式推测预探井含油气状况,效果较为明显,预测精度较高,为下一步的探井井位部署提供了重要的依据。
The deep igneous rocks are located in the Changling fault depression in the south-central Songliao Basin. Drilling confirmed that this gas-bearing fault has great exploration potential in the igneous reservoir. However, the igneous rocks have great changes in lithology, rapid phase change and strong heterogeneity, and the conditions for hydrocarbon accumulation are very complicated, making the exploration of deep igneous rocks very difficult. Especially in the reservoir properties and gas prediction, there is still no mature and effective technical means. At the same time, Spectra spectrum attenuation prediction technique was introduced to predict the physical property and hydrocarbon-bearing status of the target reservoir by detecting the spectral attenuation characteristics of the target rock. Applying this technique to the prediction of deep igneous reservoirs in the Changling fault depression area, the prediction of the hydrocarbon-generating conditions in the pre-exploration wells by using the known well model is more effective and predictive accuracy is higher, which is important for the next exploration well location deployment The basis.