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七十年代后期,地震技术和数字处理取得了明显进展,提高了地震图象的清晰度和分辨力。应用地震振幅确定地层特征,对寻找各种地层圈闭型油气藏取得了很大进展。地震反射波图象对研究沉积史和沉积环境也起着重要作用。地震勘探方法的有效性随地层特征的不同而异。如各种类型的礁,可在地震记录剖面上成功的确定位置。对有产油气潜能的地质特征,如碳酸盐岩体、生物礁、角度不整合碎屑剥蚀层、砂坝及河道砂岩体、岩相过渡带、上倾尖灭砂岩和原生与次生白云岩等,在地震反射剖面上直接观察就较困难。如将地震反射剖面,地质调查成果和与地震测线有联系的钻探测井资料,进行综合研究对比,即可发现并确定地层圈闭型油气藏的位置。
In the late seventies, remarkable progress was made in seismic techniques and digital processing to improve the clarity and resolution of seismic images. Applying the seismic amplitude to determine the stratigraphic features, great progress has been made in the search for various stratigraphic trapped reservoirs. Seismic reflection wave images also play an important role in the study of sedimentary history and sedimentary environment. The effectiveness of seismic exploration methods varies with stratum characteristics. Such as various types of reefs, can successfully determine the location on the seismic record profile. Geological features of hydrocarbon potential, such as carbonate bodies, reefs, angle-unconformity clastic erosion layers, sand bar and channel sandstone bodies, facies facies transition zones, updip pinning sandstones and primary and secondary white clouds Rock, etc., it is more difficult to directly observe the seismic reflection profile. If the seismic reflection profile, the results of geological surveys and drilling logs associated with the seismic survey data, a comprehensive study and comparison, you can find and determine the position of trapped reservoirs.