基于孔隙分布非均质性建立碳酸盐岩储层产能分类标准

Establish Production Capacity Classification Criteria of Carbonate Reservoirs by Pore Distribution Heterogeneity Parameater

塔里木盆地目标研究区块碳酸盐岩为特低孔隙度渗透率储层,储集空间复杂,粒间孔、溶蚀孔、裂缝均有发育,孔隙分布具有很强的非均质性,增加了储层生产能力测井评价难度。以分析储层孔隙非均质性与渗透性之间的关系为基础,通过提取表征储层孔隙非均质性的成像孔隙度频谱特征参数,结合储层有效孔隙度、有效厚度,建立研究区碳酸盐岩储层产能分类标准,目前预测产量级别符合率为90%,为该区试气选层和区域评价提供了有力的技术支持。

The carbonate rock in the target research block of the Tarim Basin is an ultra-low porosity and ultra-low permeability reservoir with complex reservoir space including intergranular pores, dissolution pores and fractures, and strong heterogeneous pore distribution, which increases the difficulty of logging evaluation of reservoir production capacity. Based on the analysis of the relationship between reservoir porosity heterogeneity and permeability, by extracting the imaging porosity and spectral characteristic parameters characterizing reservoir porosity heterogeneity, and combing the reservoir effective porosity and effective thickness, the productivity classification criteria of the studied carbonate reservoir was established. The current forecasted production level compliance rate is 90%, which provides strong technical support for the gas testing, layer selection and regional evaluation in the area.