致密砂岩气藏多层试井解释方法研究

致密砂岩油气藏储层多套小层叠置发育，为实现产能及经济效益最大化，通常采用一套井网分层压裂多层合采的开发方式，受非均质性影响，开发过程中层间干扰严重，各小层产能贡献比例、能量衰减速度差异大，限制了产能有效发挥。在应用试井分析结果评价生产井储层动态参数、压力水平的过程中，常规试井解释模型只能反映各生产子层数据的平均值，无法准确评价各层段数据，实际指导意义存在局限性。综合运用单层、多层试井解释模型对试井数据开展精细解释，以生产测井的分层产量作为拟合计算的新增约束条件，并以此建立多层渗流试井模型，拟合结果符合率高，在降低单层试井解释模型多解性的同时，实现多层参数定量评价，对于多层合采井在开发过程中技术政策调整以及增产措施制定等工作提供强力支撑。

Research on multi-layer well test interpretation method for tight sandstone gas reservoir

The tight sandstone oil and gas reservoir has multiple sets of small layers superimposed and developed.In order to maximize the productivity and economic benefits,a set of well pattern layered fracturing and multi-layer combined production development mode is usually adopted.Due to the influence of heterogeneity,the interlayer interference is serious in the development process.The difference in productivity contribution ratio and energy attenuation rate of each small layer is large,which limits the effective production capacity.In the process of applying well test analysis results to evaluate reservoir dynamic parameters and pressure levels of production wells,conventional well test interpretation models can only reflect the average value of data of each production sub layer,and can not accurately evaluate the data of each layer segment,so the practical significance is limited.The single-layer and multi-layer well test interpretation models are comprehensively used to carry out fine interpretation of well test data.The layered production of production logging is taken as the new constraint condition for fitting calculation,and a multi-layer seepage well test model is established based on this.The fitting results have a high coincidence rate.While reducing the multiplicity of single-layer well test interpretation models,the quantitative evaluation of multi-layer parameters is realized.It provides strong support for technical policy adjustment and production increase measures formulation in the development process of multi-layer combined production wells.