应用GeoEast解释系统综合评价鄂尔多斯盆地环庆区块有利勘探目标

Comprehensive evaluation of favorable exploration targets in Huanqing Block of Ordos Basin by Geo-East interpretation system

为了更好地满足油气勘探逐步向构造—岩性、岩性等隐蔽油气藏转移的需要,充分挖掘、利用地震资料中丰富的地质信息,以三维地震、井资料为依托,针对鄂尔多斯盆地环庆区块中生界含油、古生界含气层系,应用GeoEast软件构造解释、属性分析及储层地震反演等技术方法,落实了侏罗系低幅度构造、沉积初期古地貌形态;精细刻画了三叠系长8段砂体展布;明确了古生界盒8段含气有利范围;最后通过成藏分析,明确了大面积岩性、构造—岩性油气藏特征,为实现环庆区块高效勘探、效益开发提供了技术支撑。

This paper is designed to better meet the need of oil and gas exploration to gradually shift to subtle oil and gas reservoirs,such as structural-lithologic and lithologic reservoirs,and fully explore and utilize the rich geological information in seismic data.For this purpose,the paper relies on 3D seismic data and well data to investigate the Mesozoic oil-bearing and Paleozoic gas-bearing strata of the Huanqing Block,Ordos Basin.The structural interpretation method,attribute analysis method,reservoir seismic inversion method,and other technical methods in the GeoEast software are employed to determine the morphology of low-relief Jurassic structures and the palaeogeomorphology in the early sedimentation stage.In addition,the sand body distribution in the Triassic Chang-8 Member is finely characterized,and the favorable gas-bearing range in the Paleozoic He-8 Member is clarified.Finally,the characteristics of large-scale lithologic and structural-lithologic reservoirs are defined through hydrocarbon accumulation analysis.This paper provides technical support for the efficient exploration and economic benefit development of the Huanqing Block.