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气田开发必定要经过产量上升—产量稳定—产量下降的全过程,由于苏A区块气藏为低孔、低渗透弹性气驱砂岩气藏,该区块多数气井压裂投产,产量经历较短时间的上升和稳定之后,产量开始递减。分析其递减规律对预测气田未来产量变化和最终的开发指标及以后开发措施的调整,都有着重要的意义。采用Arps法、Blasingame图版和非稳态图版3种方法分析该区块递减规律,得到产量预测值和井控储量。对比发现,这3种方法的结算结果接近,且均较可靠。因此对苏A区块的气井来说,联合3种方法进行产量递减规律分析更可行。
Due to the low porosity and low permeability elastic gas-driven sandstone gas reservoirs in the Su A block, most of the gas wells in this block have been fractured and put into production, and the production experience is relatively short Yields began to diminish after the time had risen and stabilized. It is of great significance to analyze the law of its decrement to predict the future output changes of the gas field, the final development index and the adjustment of future development measures. The method of Arps, Blasingame plot and unsteady plate were used to analyze the decreasing regularity of the block, and the yield prediction and well control reserves were obtained. The comparison shows that the settlement results of the three methods are close and both are more reliable. Therefore, it is more feasible for the gas wells in the Su A block to combine the three methods to conduct the law of decreasing production.