辽河兴古7潜山巨厚油藏水驱开发实验研究

Experimental Study on Waterflooding Development of Buried Hill Thick Reservoir in Liaohe Xinggu7 Block

兴古7潜山巨厚油藏具有双重孔隙介质变质岩的渗流特征。为了解决该区块是否实施注水开发的难题,开展了敏感性、油水渗流特征、水驱效率等实验研究。结果表明:该区储集层呈弱速敏、弱水敏、临界矿化度为2 500 mg/L;该块储层及原油物性非均质性较强,油水渗流特征复杂,不同于一般的砂岩油藏,暂不实施全面注水开发。

The buried hill reservoir in Xinggu 7 block has percolation characteristics of dual media metamorphic rock. In order to know whether this block can be developed by waterflooding, experimental studies were carried out, including reservoir sensitivity, oil-water percolation characteristics and water drive efficiency. The result shows that reservoir of Xinggu 7 oilfield possesses weak velocity sensitivity, weak water-sensitivity, critical salinity is 2 500 mg/L, petrophysical property of the reservoir in this block is heavily heterogeneous, and oil-water percolation characteristics are complicated. The reservoir is different from general sandstone reservoirs,so it is not suitable for waterflooding development at present time.