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Collaborating Authors
Results
Enhance Service Capacity and Boost Development Return
Li, Guoshun (CNPC) | Wang, Peng (CNPC) | Li, Ji (CNPC) | Jia, Pingjun (CNPC) | Liu, Meiquan (CNPC)
Abstract In order to meet the demand for energy in economic development, CNPC has initiated the "three-enhancement" project (enhancing speed, enhancing efficiency, enhancing qualification,) to enhance drilling capacity. In recent 3 years, the cycle for well construction in major drilling speed enhancement blocks has been shortened by more than 50%. The single well yield enhancement project has been carried out with large- scale application of horizontal well, underbalanced drilling and staged fracturing technologies, so that the numbers of annually drilled horizontal wells and staged fractured wells have exceeded 1000 and 500 respectively, and number of underbalanced wells reaches 350. The yield of horizontal wells is 3 times of vertical wells, realizing efficient development of low quality reservoir. The paper presents our thought for drilling speed enhancement, including the integrated application of mature technologies and such critical equipment as vertical drilling, fine-managed pressure drilling (FMPD) and geosteering tools developed for overcoming bottleneck difficulties. The paper also introduces our experiences in terms of development of tight gas, shale gas, CBM etc and other oil and gas reservoirs with integrated application of horizontal well, underbalanced drilling and staged fracturing technologies.
- Asia > China > Xinjiang Uyghur Autonomous Region > Tuha Field (0.99)
- Asia > China > Liaoning > Bohai Basin > Liaohe Basin > Liaohe Field (0.99)
- Asia > China > Inner Mongolia > Ordos Basin > Sulige Field > Ordos Formation (0.99)
- (7 more...)
Biodiesel-based Drilling Fluids
Wang, Meishan (Senior Engineer, CNPC Technical Service Company) | Sun, Mingbo (Professor, China University of Petroleum(Western China)) | Shang, Hongyan (Professor, China University of Petroleum(Western China)) | Fan, Songlin (Senior Engineer, Petroleum Engineering Research Institute of Dagang Oilfield Company(CNPC)) | Liu, Meiquan (Engineer, CNPC Technical Service Company) | Liu, Fupeng (Engineer, Petroleum Engineering Research Institute of Dagang Oilfield Company(CNPC))
Abstract The rheological properties of biodiese and white oil were compared at normal temperature and high temperature in this paper. The ability of biodiesel to inhibit shale expansion was investigated. The results showed that the rheological properties of biodiese were better than white oil. Biodiese also showed better resistance to high temperature and shale expansion. Organo- lignite and vegetable pitch were used to reduce the filtration in biodiesel-based drilling fluids system. The optimum formulation of biodiesel-based drilling fluids was determined by experiments. In order to simulate the contamination of calcium and dry soil, CaSO4·2H2O and sodium-based bentonite were added to the system, and the experimental results showed that the tolerance of biodiesel-based drilling fluids to the contamination of calcium and dry soil is desirable.