Ascertain Rational Silica Sand Dosage In Deep Well Contion

With the exploration drilling activity in deep formation boost increasingly, deep well,ultra deep well,geothermal well have emerged more and more, the downhole still temperature remain between 100 centigrade and 150 centigrade in general,some even reach 150 centigrade. Well cement was placed in such a high temperature, the physiochemical performance of cement would change dramatically, cement intensity would decline, affecting the cementing operation and cement job quality seriously. By means of adding ourward admixture such as silica sand,such operation can adjust the physiochemical performance of cement,control the cement intensity recession in high temperature.thus, ascertain Rational silica sand dosage for well cement in deep well contion, Hence,developing performance alternation regular pattern and theoretic research about well cement in high temperature placed an important theoretic direction role in optimal design on deep well cement formula and development on additive.The thesis investigate on G level well cement, base on plentiful experiments and theoretic analysis, high temperature intensity recession depression treatment and mechanism study about cement rock is developed, providing theoretic bases for deep well cement operation system design and optimization. Research result confirm the rational silica sand dosage for well cement in deep well contion, providing bases and foundation for optimization and design on deep well cement slurry system, which is based on G level well cement, guiding the oil field well cementation.