高温高压气田产能评价研究——以东方C气田为例

Research on production evaluation of high-temperature and high-pressure gas field:A case of Dongfang C GasField

针对高温高压气田地层压力高、测试产量大导致的二项式无阻流量异常的问题,通过分析产能测试资料,发现常规二项式方程的局限性和测试压力与真实压力偏差是高温高压气井产能异常的主要原因,通过研究产能影响因素,建立了压力校正法、改进产能方程和地层参数法三种产能异常校正方法,新方法应用于东方C高温高压气田的产能评价,解决了东方C气田测试流压和产能曲线的偏差导致的产能异常难题,获得了可靠合理的产能评价方程,新方法为海上高温高压气田产能评价提供了新的思路。

Aiming at the problem of binomial open flow anomaly caused by high formation pressure and large test output in hightemperature and high-pressure gas fields,through analyzing the productivity test data,it is found that the limitations of the conventional binomial equation and the deviation between test pressure and real pressure are the main reasons for the abnormal productivity of hightemperature and high-pressure gas wells.Through the study of productivity influencing factors,three productivity anomaly correction methods,which are pressure correction method,improved productivity equation,and stratigraphic parameter method are established.The new method is applied to the productivity evaluation of the Dongfang C high-temperature and high-pressure gas field,which solves the difficult problem of abnormal productivity caused by the deviation of test flow pressure and productivity curve of the Dongfang C gas field,and obtains a reliable and reasonable productivity evaluation equation.The new method provides a new idea for the productivity evaluation of offshore high-temperature and high-pressure gas fields.