特低—低渗气藏“一点法测试”工作制度研究

Research of "Single Point Testing" Working System of Extra-Low and Low Permeability Gas Reservoir

"一点法测试"其α值基本都是由经验方法获得的,对于新区探井,直接借用α值计算无阻流量必然存在较大误差。因此,如何选取合适的α值对新区无阻流量的计算值影响较大;对于特低-低渗透气藏来说,工作制度的选择同样对无阻流量的计算影响较大,如何选择合理的工作制度成为一个非常重要的问题。以南海西部某凹陷无阻流量的计算为例,通过计算分析,选取了适合该凹陷的"一点法测试"产能计算公式以及最优的工作制度,为该区块产能测试和计算提供依据和支持。

For new blocks,larger errors of open flow capacity are made using α directly,whose value in 'Single Point Testing' is always obtained from empirical formula.So,how to choose a proper value of α affects greatly calculated value of open flow capacity.For extra-low and low permeability gas reservoir,greater impact of open flow capacity are made by how to select the working system,So,choosing a reasonable working system become a very important problem.By taking example of an open flow capacity of any hollow of the western South China Sea and through calculating and analysis,the capacity formula of 'Single Point Testing' and optimal working system are selected which provides basis and supporting for testing of producing capacity and calculation of this block.