二氧化碳气藏测试评价研究

The Evaluation on the Test Method for Carbon Dioxide Gas Reservoir

胜利油田已发现八里泊、阳25、平方王、平南、高青、H17等二氧化碳气(田)藏,为了解二氧化碳气层特征,为制订合理的开发方案提供依据,开展了相关的试井测试。本文主要依托矿场实测资料,分析了二氧化碳气层测试过程中的相态变化以及冰堵、腐蚀等问题;根据测试资料,利用压降曲线法确定了单井的控制储量;利用修正等时试井数据,确定了二项式产能方程和无阻流量;最后利用压力恢复资料,确定了地层有效渗透率、表皮系数等参数。通过测试评价研究,为二氧化碳气藏的开发利用和未来测试提供技术借鉴。

In Shengli Oilfield many carbon dioxide gas （field） reservoir have been found. To understand the characteristics of carbon dioxide gas reservoir and to provide a basis for the reasonable development programs, the relevant tests of the well testing were carried. Based on the measured data, we analyzed the phase change of carbon dioxide gas and the ice blocking and corrosion problem during test. According to the test data, we determined the single well controlled reserves using the pressure drop curve method. Then by use of the modified isochronal test data, we determined the binomial deliverability equation and the open flow capacity. Lastly, we determined the formation effective permeability, skin factor and other parameters according to the pressure buildup data. By the test evaluation studies, the technical reference is provided for development and utilization of carbon dioxide gas reservoirs.