The article discusses a technique called Three facies technique that helps predict the distribution of volcanic rocks in oil/gas reservoirs. By analyzing seismic and logging data, researchers identified different types of volcanic facies and their distribution patterns. They found that volcanic channel facies have the best properties, followed by intrusive and eruptive facies, while volcanic sedimentary facies are the least favorable. This technique is crucial for understanding the distribution of volcanic rocks in oil/gas reservoirs, which can improve exploration and production efforts in these complex environments.