“三相”联合解释技术在岩性油气藏勘探中的应用—以吐哈盆地胜北地区为例

采用测井相、地震相、沉积相“三相”联合解释技术进行吐鲁番－哈密盆地胜北地区岩性油 气藏纵向有利勘探层系和平面有利勘探位置优选,其中用测井相与岩芯观察结合确定主要勘 探目的层井点处的沉积微相类型,用地震相分析确定目的层平面地震相变化特征,用单井等 建立的纵向沉积微相组合模式和平面沉积微相变化规律来全面确定目的层沉积微相变化特征 ,直接指导岩性油气藏有利勘探层系和平面位置的选择。通过在胜北地区喀拉扎组的应用, 确定了胜北构造带及其南翼喀拉扎组冲积扇扇中辫流河道为岩性油气藏有利勘探区带和层系 ,优选的目标胜北16井在实际勘探中取得了良好效果,评价出北部辫流河道东段和南部辫流 河道为下一步的有利勘探地区。认为“三相”联合解释技术在地震资料品质较好、构造相对 简单且具备一定勘探程度的地区具有良好实用性。

"THREE FACIES" INTEGRATED INTERPRETATION TECHNIQUE AND ITS APPLICATION IN LITHOLOGIC RESERVOIR EXPLORATION IN SHENGBEI AREA, TURPAN-HARMY BASIN

By the "three facies" integrated interpretation technique,which is the combination of log facies,seismic facies and sedimentary microfacies,the favorable sequences in vertical and the favorable regions in plane are determined to explore the lithologic reservoirs of the Shengbei region in the Turpan-harmy basin.Log facies combined with the core observation is to define the sedimentary microfacies type of the main exploration formation in the well points.Seismic facies analysis is to define the seismic facies variation of the main exploration formation in plane.Sedimentary microfacies is to define the microfacies variation as a whole according to the microfacies combination pattern established by single well etc.The "three facies" integrated interpretation result may be directly used to select the favorable sequences in vertical and the favorable region in plane to explore lithologic reservoirs.The method is applied in the Shengbei region of the Turpan-harmy basin.The middle fan braided channels of alluvial fans of the Kalazha Formation in the Shengbei structural belt and its south flank are determined as the favorable positions for exploration.The selected and employed target of Well Shengbei 16 gets a good exploration result.The application shows that this technique is an effective way for the lithologic reservoir exploration in regions with good quality of seismic data,simple structures and certain degree of exploration.