利用阵列声波测井资料评价变质岩储层有效性

目前主要利用常规测井识别变质岩岩性进而评价储层，利用阵列声波测井评价变质岩储层有效性的研究较少。为此，以渤中19-6气田变质岩测井资料为基础，分析阵列声波测井的响应特征，基于常规声学参数计算提出平均衰减计算方法；通过定量研究多种声学参数与不同储层之间的相关性，提炼出对有效储层敏感的9种声学参数(纵波、横波、斯通利波的时差、阵列衰减以及平均衰减等)，建立基于敏感声学参数的储层有效性评价图板与方案。利用所提方法对新井资料进行处理，并评价了储层有效性，评价结果与测试结果符合率达到91.43%，满足现场应用需求。

Evaluation of metamorphic reservoir effectiveness by array acoustic logging data

At present, conventional logging is mainly used to identify the lithology of metamorphic rock and then evaluate the reservoirs, while array acoustic logging is seldom used to evaluate the effectiveness of metamorphic rock reservoirs. Therefore, given the logging data of metamorphic rock in Bozhong 19-6 (BZ19-6) gas field, the response characteristics of array acoustic logging are analyzed, and the average attenuation calculation method is proposed on the basis of the conventional acoustic parameter calculation. By the quantitative study of the correlation between various acoustic parameters and different reservoirs, nine acoustic parameters sensitive to effective reservoirs, such as the time difference of longitudinal wave, shear wave, and Stoneley wave, array attenuation, and average attenuation, are extracted, and the evaluation chart and scheme of reservoir effectiveness based on sensitive acoustic parameters are established. The new well data are processed by the proposed method, and the reservoir effectiveness is evaluated. The coincidence rate between the evaluation results and the test results is 91.43%, which meets the field application requirements.