76 dokomite samples, the water sample from 17 wells. and the sample of water sealing from the No.436 well were tested for trace elements Sr and Ba in Wumishan formation of Renqiu oil field. The dissolution and precipitation of minerals composed of these trace elements at different temperatures and under different pressures of CO2 were simulated using the PHREEQM, software. The distribution and migration of the trace elements were discussed. The result shows that the distribution of trace elements was controlled by the sedimentation environment and the post stage water-roek interaction. Minerals formed in a high energy envi ronment of subtidol zoDe have a high content of trace elements. The Sr, for examplel, may reach as high a 0.03%; While those formed in a low energy environment of suprallitoral zone have a low content of Sr, only 0.0028%. For the scaling, the content of Sr may be as high as 0.69% and that of Ba is 0.09%, much higher than that in rocks and in water of the oil field, indicating that there exists a strong condensation action in the scaling process.

车变应用扫描电镜、X-折射、压汞试验及力学强度试验等方法。研究了兖州及徐州地区红层的物质组成、孔隙结构、力学强度及膨胀和崩解特性，初步探讨了红层对 煤矿建井与煤层开采的影响。