帅垛区油气赋存状态受背斜构造背景、断裂复杂化作用、储层砂体非均质性以及泥岩隔层等因素的共同作用，油气水关系十分复杂，各主要含油砂层断块的油藏边界尚不清楚。如何运用反演技术预测储层含油有利区是该区油气勘探的关键问题。通过地层、岩石物理特征、储层等方面的成果的综合分析研究的基础上，探索用3种反演方法进行含油性预测。基于地震资料，根据约束稀疏脉冲反演得到的波阻抗剖面再结合随机反演得到的反演砂体厚度图预测砂体富集区，利用多参数反演预测砂岩含油性，判断潜在有利区，结合3种反演方法可以较好的预测含油有利区。结果显示：此方法能比较完整地保留地震反演的基本特征，不存在多解性问题，并能较好的对储层进行含油有利区的预测。%Oil and gas occurrence state of Shuaiduo area is affected by anticline structure background, complicated fracture effects,heterogeneity of reservoir sand and shale interlayer and other factors, where the relationship between water, gas and oil becomes very complex. Reservoir boundary of each main oil sand block is still unclear. The critical problem for oil and gas exploration of this area is how to use inversion techniques to predict favorable oil regions of reservoirs. Trough comprehensive analysis and research on results of stratums,rock physical features and reservoirs,three inversion methods have been used to predict oiliness. Based on seismic data,wave impedance sections got from constrained sparse pulse inversion combining with inversion sand thickness maps got from random inversion can be used to predict sand enriching area. Multi-parameter inversion is used to predict sand oiliness, which can determine potential favorable areas. Combining three inversion methods could better predict oil favorable areas, Results indicate that this method can maintain basic characteristics of seismic inversion more completely, where exists no multi-solution problem and can better conduct prediction on oil favorable areas of reservoirs.
展开▼
