泾河油田裂缝型致密油藏地质特征及开发对策

在阐述裂缝致密油藏地质及开发动态特征的基础上，明确了开发难点，并提出开发对策，可为同类型油田开发提供借鉴。泾河油田储层致密、孔喉细小、连通性差、可动流体百分数低，发育构造和水平层理裂缝，裂缝是高产主控因素。储层可划分为4类，I、Ⅱ类为"甜点"，非均质性强、厚度薄、孔隙度低、含油饱和度低、储量丰度低；油井产量低、产能差异大、产量递减快、累产低、采收率低，开发难度大。开发难点主要有"甜点"精细描述难度大、提高井控储量难度大、提高采收率难度大、能量补充难度大等。针对开发难点，提出了"非连续"性井位部署、水平井分段压裂、滚动建产、优化油藏工程参数、能量补充先导试验、实施低成本战略等6项开发对策。

Multi-wells Constrained Seismic Inversion and Reservoir Prediction in the 27th Region,Jinzhou

The 27th region, Jinzhou, belongs to complex fault-block area, it is difficult to build geological model. The use of the normal inversion method which is based on the initial model is difficult to get exact inversion result. The constrained sparse pulse inversion technology is used to extract the wavelet of near-well seismic traces, and synthetic record is generated, the bearing horizon calibrated, wave impedance inversion carried out, and the absolute wave impedance profiles obtained, then they are converted into sand-mudstone profiles. The inversion results are consistent with the drilling results. Thus the average and maximum wave impedance values of different times are extracted along the top of the target layer（T₃^u1） and the sand developed belts are located to predict the reservoir .The results shows that the use of constrained sparse pulse inversion in the complex fault-block area can be used to predict the lithological reservoir and distribution law with relatively high accuracy, which has some guidance significance for the further exploration and development of oilfield.