Please wait a minute...
Journal of Liaoning Petrochemical University
Current Issue
2016, Vol.36 No.6  Publication date:27 December 2016
Previous Issue Next Issue
  • Research and Application of Polyamine Water-Based Drilling Fluid for Long Open Hole Interval in Tahe Oilfield

  • Qiu Zhengsong, Zhang Daoming, Fu Jianguo, Tong Shiquan, Zhong Hanyi, Xing Xiaodong
  • 2016, 36 (6): 33-38. DOI:10.3969/j.issn.1672-6952.2016.06.008
  • Abstract ( ) PDF ( 2701KB ) ( )   
  • Wellbore instability of long open hole interval in the drilling operation of Tahe oilfield is prominent in recent years. The structures, physical and chemical properties of typical shale samples from targeted zone were characterized firstly. The wellbore instability of long open hole interval of Tahe oilfield was analyzed with the combination of shale sample characterization and field operation. Meanwhile, the strategies of drilling fluid technology were proposed. Two water-based drilling fluid formulas were optimized in laboratory according to the characteristics of up and bottom formation of Tahe oilfield. Polyamine polymer drilling fluid system was chosen for the up formation, it can resistant 10%NaCl, 5%bentonite, 1%CaCl2, 1%CaSO4 and the shale recovery was above 75%. Polyamine polysulfonate drilling fluid was chosen for the bottom formation. It can resistant 5%NaCl, 5%bentonite, 1% CaCl2, 1% CaSO4 and the shale recovery was above 85%. The optimized two formulas in laboratory were applied in the field respectively. The application results indicated that polyamine polymer drilling fluid could effectively suppress the shale hydration and swell in the up formation, and the average hole diameter enlargement rate in test well was 4.47%. Polyamine polysulfonate drilling fluid could effectively prevent the caving and flaking, and the average hole diameter enlargement rate in test well was 9.42%. The wellbore stability was improved, and the comprehensive benefits were improved.

  • Related Articles | Metrics
  • Analysis of Real Estate Project Financing Risk Evaluation

  • Wang Jun, Yang Guang
  • 2016, 36 (6): 74-78. DOI:10.3969/j.issn.1672-6952.2016.06.016
  • Abstract ( ) PDF ( 1732KB ) ( )   
  • The project financing was a kind of important international financial tools, used in commercial real estate field, and was a kind of brand-new exploration. With the continuous development and deepening of economic restructuring, the development of China's real estate industry gradually became an important pillar of China's economic development, and was paid close attention by domestic and foreign personnel. Currently, there were many financing ways of the real estate project, but there were still many problems in financing risks which finally led to the entire project failure and brought great loss to China's economy. The real estate project financing risks were large and complex, but the fuzzy evaluation model could be established to analyze the risks through the summary on the financing risk of real estate project. The use of It was a large system of a multi-objective, multi-level, complex structure and factors to use fuzzy comprehensive evaluation method to evaluate the financing risk of commercial real estate project, and the system could do a very good interpretation and analysis of the financing risk of real estate project. As the real estate project selection, it was an important basis of financing scheme to reduce unnecessary loss for the real estate project financing.

  • Related Articles | Metrics