基于偶极横波资料的火山岩裂缝及油气识别

IGNEOUS ROCK FRACTURES AND HYDROCARBON IDENTIFICATION BASED ON DSL DATA

火山岩油气藏已成为重要的油气勘探目标和储量增长点。在火山岩的地层评价中,裂缝与油气识别一直是一个核心问题。针对地层矿物成分与岩性十分复杂、常规测井方法很难准确快速识别,应用声波能量衰减对于天然裂缝极为敏感特性,利用斯伦贝谢偶极横波资料可以计算纵、横波及斯通利波能量衰减的特性,实现对裂缝的有效识别。在岩性、物性等因素基本一致的条件下,利用纵、横波能量重叠、泊松比、波速比还可以较好地识别气层。克拉玛依火山岩地层的实际应用效果表明,偶极横波资料在火山岩地层评价中具有十分重要的作用,为火山岩地层裂缝与油气识别开辟了新的途径。

Igneous rock reservoir has been important explorative target and potential reserve target.In igneous rock evaluation,identifying fractures and hydrocarbon is a key issue.In view of the factors,i.e.conventional well logging is difficult to identify the complicated mineral components and lithology,the characteristics are used that acoustic energy attenuation is very sensitive to the response of natural fractures and that Schlumberger S wave data can be used to calculate the property of energy attenuation of P wave,S wave and stoneley wave,the effective identification to fractures is realized.Under the conditions of physical property and lithology being basically coincident,by means of S and P wave energy overlap,poisson ratio and wave velocity ratio,the gas formation can be identified,the practical application of Karamay igneous rock reservoirs indicates DSI data plays an important role in igneous rock reservoir evaluation,the method explores a new path for igneous rock fracture and hydrocarbon identification.