Combined with synchronized monitoring techniques, purification processes for active constituent of alkylbenzene sulfonate have been optimized, and the total alkylbenzene sulfonate, mono-alkylbenzene sulfonate and di-alkylbenzene sulfonate can be obtained with purity over 90%. With the above active constituents as standard substances respectively, the determination of alkylbenzene sulfonate content in the original samples was carried out by high performance liquid chromatograph. The results showed the sample contained mono- and di-alkylbenzene sulfonate simultaneously, and the content of mono-alkylbenzene sulfonate was much higher than that of di-alkylbenzene sulfonate. They had maximum absorption at the wavelength of 224 nm, and the absorption coefficients of total alkylbenzene sulfonate and mono-alkylbenzene sulfonate were similar, higher than that of di-alkylbenzene sulfonate. With total, mono- and di-alkylbenzene sulfonate as standard substances respectively, the limits of quantitation were 5 mg/L, 5 mg/L and 10 mg/L, respectively. The determination result of active constituent was about 3% lower with total alkylbenzene sulfonate as standard substance than that with mono- and di-alkylbenzene sulfonate as standard substances simultaneously, owing to the weaker absorption coefficient of di-alkylbenzene sulfonate.

There are many difficulties during the shale gas development and drilling process in Changning block, such as serious nature deviation angle of surface formation, poor drillability, small deviation in anticollision and angle maintaining interval, collapse in the angle descending interval, long drilling period, high drilling cost, and so on. Based on the disadvantages analysis of the previous design plan, the well distribution plan, well trajectory design and drilling technology is further optimized for the cluster wells, and a new trajectory optimization scheme is proposed. The technology scheme has achieved good results through field test. The drilling speed has been improved obviously and the drilling period has been reduced significally, which provide technical support for the shale gas development in Changning block.

Through measuring the basic physical properties and model Dv-111+programmable rheometer, the experimental research on rheological properties was done, which analysed the influence of water content ratio, temperature and shear rate. The results show that the rate of water content is a major factor that influences rheological characteristies of water-bearing super-heavy oil. With the change of water content ratio, the apparent viscosity of super heavy oil exhibits a more complex pattern. Oil water ratio greater than 30%, the non Newtonian character is not obvious when the rate of water content was over 30%. Whats more, the temperature and shear rate have an influence on the rheological property when the rate of water content was high. Different conditions have different flow pattern transition point. 