diff --git a/Src/nmNum/nmCalculation/nmCalculationPebiGrid.cpp b/Src/nmNum/nmCalculation/nmCalculationPebiGrid.cpp
index 4133be2..0f783b1 100644
--- a/Src/nmNum/nmCalculation/nmCalculationPebiGrid.cpp
+++ b/Src/nmNum/nmCalculation/nmCalculationPebiGrid.cpp
@@ -1030,6 +1030,15 @@ bool nmCalculationPebiGrid::beginManualInputSnapshot(
     oSnapshot.m_nGridInputRevision =
             pAnalysisCase->getGridInputRevision();
     oSnapshot.m_oGridInput = HX_NWTM_GRID_INPUT();
+
+    // HX_NWTM_GRID_INPUT构造函数带有演示井，分批追加真实井前必须清空，
+    // 避免求解前建网混入额外井，并保证网格井槽位与求解井顺序一致。
+    oSnapshot.m_oGridInput.VerticalWell.clear();
+    oSnapshot.m_oGridInput.FractureVerticalWell.clear();
+    oSnapshot.m_oGridInput.MultistageFracturedHorizontalWell.clear();
+    oSnapshot.m_oGridInput.HorizontalWell.clear();
+    oSnapshot.m_oGridInput.InclinedWell.clear();
+
     oSnapshot.m_oGridInput.GridControl =
             pDataManager->getPebiGridControl();