基于生产压差的深层气层出砂预测

随着油气开采程度的不断加大，地层出砂现象日益增多。深部储层压实作用较强，岩石致密且稳定性较好，只有生产压差过大时才会导致岩石发生剪切破坏或拉伸破坏，表现为地层出砂。准确把握和计算产层的合理生产压差显得尤为重要。为此，以大北气田埋藏较深的白垩系产气层段为研究对象，运用多种方法建立临界生产压差的计算模型，实现了利用测井资料快速准确地计算生产压差，用于出砂定量分析与确定最优完井方法，旨在为防砂增产提供决策依据。

SANDING PREDICTION OF THE DEEP GAS RESERVOIR BASED ON PRODUCING PRESSURE DIFFERENCE

The sanding phenomenon is more frequent with the development of oil and gas exploitation.Rocks in deep gas reservoir have a good stability，the rock will not be broken unless there is an inconsistent producing pressure，and the reservoir will produce sand in such a condition.Thus，it is very important to calculate the pressure accurately.For this reason，this paper establishes the calculating model of the critical production pressure which can be used for sanding analyzing，and choosing the best completion method.This can lay a foundation for the decision-making of sand controlling and production increasing.