低孔渗储层测井资料评价及地质、工程应用

由于传统的测井认识和技术的局限性，对低孔隙度、低渗透率油气储层往往认识不足，并造成后续油气田开发工程措施不当。为此，以胜利油气区临盘下第三系渐新统沙河街组三段上层基山砂岩体低孔低渗储层为研究目标，探索、研究测井资料在低孔低渗储层评价及改造中发挥的作用。根据常规测井资料和岩石物理实验分析数据以及试油成果，研究了储层“四性”关系，确定了低孔、低渗油气层的评价标准，进一步按物性品质将油气层分为Ⅰ、Ⅱ、Ⅲ类，为储层改造有针对性地提供施工层位和储层参数；充分利用正交多极子阵列声波测井资料提供的声波资料，结合其他常规测井资料计算岩石力学参数、岩石机械特性参数，有效地对井眼稳定性进行评估，对所改造层位进行了压裂高度及施工压力参数预测。结果表明，其计算精度大于90%。

USING LOGGING DATA TO EVALUATE LOW POROSITY AND LOW PERMEABILITY RESERVOIR AND ITS GEOLOGIC AND ENGINEERING APPLICATION

Restricted by traditional logging knowledge and techniques, our understanding for oil and gas reservoirs with low porosity and permeability is short, which will result in improper engineering measures in the next oil and gas field exploitation. Therefore, taking the low porosity and low permeability reservoir in Jishan sandstone body in the upper Shahejie 3 of Oligocene in lower Tertiary in Linpan, Shengli oil field as research objective, this study researched the roles of the logging data in the evaluation and reconstruction of the reservoir with low porosity and permeability. On the basis of the conventional logging data, petrophysical experiment analysis data and oil testing results, the study researched the relations among four reservoir properties, determined the evaluation standards for oil and gas reservoir with low porosity and permeability, further classified the oil and gas bearing reservoirs into three classes on their physical quality, and provided production layer sand reservoir parameters for reservoir reconstruction; making full use of sonic data from orthogonal multiple array sonic logging and combining other logging data, the study computed rock mechanics parameters and rock mechanical characteristic parameters, effectively evaluated the borehole stability, and predicted fracturing height and construction pressure parameters for the reconstructed formations. The research results indicated that the computed accuracy rate exceeded 90%.