中低渗薄层难动用储量开发影响因素及对策研究

On the Influencing Factors and Strategy for the Development of Medium and Low Permeability Thin Layers with Difficult-to-Produce Reserves

中低渗薄层油藏具有特殊的油气成藏特征,且油藏地质储量丰富。八面河油田滩Ⅱ块主要沉积类型为滩坝砂沉积,储层类型属中低渗薄层细喉型,储层渗流能力较差,油气成藏主要受岩性和断裂活动的控制。制定的开发对策为以递减规律分析和经济评价相结合,确定区块经济极限初产,进而明确优势区域分布,最终确定开发部署。

The medium and low permeability thin layers have special characteristics of hydrocarbon accumulation,and the reservoirs are rich in geological reserves.The main sedimentary type of Tan Ⅱ block in Bamianhe oilfield is the beach-bar sand deposit.The reservoir type belongs to thin layers of small-throat pores with medium and low permeability.The seepage of the reservoir is poor,and the oil and gas accumulation is mainly controlled by the lithology and fault activity.The developed strategy is to combine the analysis of decline law with economic evaluation to determine the economic limit of the initial production of the block,and then define the distribution of the favorable area,and finally determine the development deployment.