二项式物质平衡方程预测异常高压气藏储量

针对异常高压气藏开发过程中预测地质储量难的问题，利用异常高压气藏pD-GpD曲线与无因次IPR曲线形状的相似性，提出了预测异常高压气藏储量的二项式物质平衡方程新模型。以美国Louisiana North Ossun “NS2B”、Louisiana Offshore Cajun、Gulf Coast Anderson “L”和South Louisiana Miocene异常高压气藏为例，新模型计算出的地质储量相对误差分别为-2.88%，0.26%，1.57%和-2.81%。对比文献预测结果发现，新模型的预测精度优于其他方法，且能较准确地预测水侵量，从而论证了该方法的有效性、准确性和可靠性，为异常高压气藏动态分析提供了一种有效方法。

A QUADRATIC MATERIAL BALANCE EQUATION OF CALCULATION OF INITIAL GAS IN PLACE FOR ABNORMAL GEO-PRESSURED GAS RESERVOIRS

Aiming at the issue that it is difficult to predict geological reserves in the process of developing abnormally high pressure gas reservoir，by making use of the similarity of abnormally high pressure gas reservoir PD-GPD curve and dimentionaless IPR curve，the new model of quadratic material balance equation is presented to predict abnormally high pressure gas reservoir reserves.Taking Louisiana North Ossun “NS2B”，Louisiana Offshore Cajun，Gulf Coast Anderson “L” and South Louisiana Miocene abnormally high pressure gas reservoirs in the States as examples，the relative errors of geological reserves calculated with the new model are -2.88%，0.26%，1.57% and -2.81% respectively.By comparing with literature，it is found that the predicting precision is higher than any other ways，and the water influx can be more precisely predicted.The effectiveness，accuracy and reliability of the method are demonstrated，which provides a useful way for abnormally high pressure gas reservoir performance analysis.