处理解释一体化技术在玛湖地区砂砾岩油气勘探中的应用

Integrated seismic data processing and interpretation applied in the conglomerate hydrocarbon exploration in Mahu Area

准噶尔盆地玛湖凹陷近年的探明储量大部分来源于扇三角洲砂砾岩储集层,扇体及其边界识别、优质储层预测、走滑断裂识别是油气勘探面临的三个关键问题。根据GeoEast系统提供的处理解释一体化技术,采用叠前高保真噪声压制和井震结合多次波压制技术提高地震资料品质;在此基础上,根据"三位一体"综合地震地质解释技术确定扇体及其边界;通过叠前、叠后反演技术预测物性好的储层发育区;运用多属性识别走滑断裂。通过该技术的运用,目的层视主频提高了10～15Hz;识别出了6个扇体及边界。实际应用表明,GeoEast系统为玛湖地区致密砂砾岩油气勘探提供了重要技术支撑,应用成效显著。

In recent years,the proved reserves of Mahu Sag in Junggar Basin are mostly from fan-delta conglomerate reservoirs.The three key issues in oil and gas exploration are fan body and its boundary identification,high-quality reservoir prediction,and strike-slip fracture identification.With integrated processing and interpretation tools provided by GeoEast System,the prestack high-fidelity noise suppression and multiple removal on logging and seismic data are mainly used to improve seismic data quality.On this basis,fan-bodies and its boundaries are determined with the'trinity'comprehensive seismic geological interpretation.Prestack and poststack inversions are used to predict reservoir development zones with good physical properties.Multi-attributes are used to identify strike-slip faults.After this processing,the apparent frequency of targets is increased by 10-15 Hz.6 fan-bodies and their boundaries are identified rather than 4 from previous geological understanding.Based on our applications in Mahu Area,GeoEast System provides important technical supports for the conglomerate exploration,evaluation,and development,and makes remarkable achievements.