隐蔽油藏描述技术在渤南油田滚动开发中的应用

THE APPLICATION OF DESCRIPTION TECHNOLOGY FOR CONCEALMENT OIL POOL IN BONAN OIL-FIELD ROLLING PROSPECTION

渤南洼陷经过40年勘探,资源探明程度已达65%,继续勘探难度很大。本文对渤南洼陷北部地区的勘探潜力进行了分析,通过零星探井的试油试采特征,证明渤北地区有较大的勘探潜力,勘探开发的关键是描述储层沉积特征。通过高精度层序地层分析建立精细的地层格架,应用沉积相分析、相控储层描述技术、测井约束反演技术对渤北地区沙三段浊积砂岩沉积模式由以前认识的席状砂更新为水道砂,首次在渤北地区识别出浊积水道砂体,经过钻探得到证实,完钻16口井钻遇油层到8-15.0米,油井投产日油达到30-95吨,取得显著效果,为该地区以及同类地区隐蔽油藏勘探指明了方向。

It is difficult to discover the subtle deposit in area with high exploration mature with more than 40 years of exploration history and with exploration mature degree up to 65%,the paper demonstrates greater exploration potency in north BoNan through analysis factors of exploration potency and production character of oil test of the wild sparse well in the area,also points out its key part is the description of sedimentary character of the reservoir.Former recognition of the sedimentary model of sheet sands is adjusted into that of channel sands through such efforts as establishing fine bed schema by high resolution sequence analysis,application of sedimentary face analysis,description of reservoir under control of sedimentary and seismic data inversion with boundary of well log;it is the first time that turburtite channel sand has been identified and proven by well drill,and 16 wells are drilled and oil beds are met with thickness of 8-15 meters,and oil wells production is increased to 30-90t/d daily,from which prominent effect is obtained.It provides a worthy guidance for exploring the same type of subtle deposit in the area.