特低渗透砾岩油藏调整方式研究——以530井区下乌尔禾组油藏为例

Research on the Adjusting Modes of Extra-low Permeability Conglomerate Reservoir——By Taking Lower Wuerhe Reservoir of Upper Permian in Wellblock 530 of Karamay Oilfield for Example

克拉玛依油田530井区下乌尔禾组油藏为低孔、特低渗透、厚层块状砾岩、断层遮挡下的岩性油藏,平均渗透率0.348×10-3μm2。油藏开发暴露出的主要问题有:裂缝水窜与油井低压、低液同时存在,油井见效率低,采油速度低,开发效果平面差异大等。同时,油藏北部、东部、南部边部地质储量没有得到充分动用,油藏开发调整势在必行。根据地质、开发特征将油藏划分为3个小区,提出了分区、分层的初步加密调整思路,明确了调整的潜力,优化了调整开发的方式。

Lower Wuerhe Reservoir in Wellblock 530 of Karamay Oilfield was the massive conglomerate reservoir with low porosity and extra-low permeability with an average permeability of 0.348 × 10-3 μm2. The main problem of the reservoir development was water channeling in fractures and low-voltage and low-liquid. At the same time, water flood was inefficient and was low production rate, the effect of the development was the big difference in plane. Geological reserves in the northern, eastern, southern edges of oil reservoir were not fully used, it was imperative to adjust reservoir development . According to the geology and the development characteristics of the reservoir it was divided into three areas. The initial idea of zoning adjustment is proposed to optimize the development.