三维地质模型在薄层油藏水平井地质设计中的应用——以克拉玛依油田八区530井区克下组油藏水平评价井为例

RESEARCH ON APPLICATION OF THE THREE-DIMENSIONAL GEOLOGICAL MODEL TO LOW POROSITY,LOW PERMEABILITY,THIN OIL LAYER AND THE GEOLOGICAL DESIGN OF THE WELLS

薄油层水平井地质设计的关键技术是建立精细的三维地质模型,据此可以确定明确的地质目标,设计合理的钻井轨迹。本文优选克拉玛依油田八区530井区克下组油藏油层较薄的区域作为水平井评价区域,以精细构造解释、储层反演、沉积微相研究及测井解释结果为基础,以完钻直井资料为约束,采用相控随机建模方法,建立主力砂层T2k12-4和T2k12-5层构造模型和有效厚度模型,精细刻画了0.38m-3.15m之间薄油层空间展布特征,并在三维地质模型中完成水平评价井HW80466井的地质设计。该井实施取得了较好的效果,达到了该区克下组油藏扩边区探明储量整体申报及薄油层区域采用水平井开发可行性论证目的。

The key technolog of the Geological Design of the Horizontal Wells in the thin oil field is the building of the fine Three-dimensional Geological Mode,then the definite geological target can be defined,and appropriate drillinig trace can be designed.By using the material of the three-dimensional seismic,well drilling,logging and well borehole,the optimization of the northeast thin oil reservoir area of the lower Karamay Fm reservoir in the 530 well field was used as the area of horizontal evaluation well.Based on the fine explanation of the structure,inversion of reservoir,sedimentary faces and the Rolling Exploration,by restricting the material of the drelled straight well,the model of the fine structure interpretation of the major sand layer and the model of the effective height were established,the feature of more than 0.5m thin reservoir had been depicted,and the Geological Design of the horizontal well had been accomplished,and the favorable effectiveness had been acquired.