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Wang L.N.,Petroleum Production Engineering Research Institute of Huabei Oilfield Company | Liang J.,The third exploitation factory of Huabei oilfield company | Zhang S.L.,Petroleum Production Engineering Research Institute of Huabei Oilfield Company | Wang L.Y.,The third exploitation factory of Huabei oilfield company
Applied Mechanics and Materials | Year: 2014

The conventional dynamometer diagram diagnosis method of rod pumped well has the function to calculate the well yield based on the downhole dynagraph. In recent years, it can substitute for the traditional separator metering mode technically through further development and support to measure the oil well in an automatic and remote manner, analyze the working conditions and alarm in a real time manner, thus simplifying the collection process and improving the metering accuracy and working efficiency. In this paper, the technical and management problems in development and application of automatic metering technology of rod pumped well dynamometer diagram in Huabei Oilfield are discussed and solutions are proposed in order to guide the wide application of such technology in Huabei Oilfield. © (2014) Trans Tech Publications, Switzerland. Source


Haifeng Z.,China University of Petroleum - Beijing | Hang C.,Petroleum Production Engineering Research Institute of Huabei Oilfield Company | Guohua L.,Petroleum Production Engineering Research Institute of Huabei Oilfield Company | Yawei L.,China University of Petroleum - Beijing | And 2 more authors.
Journal of Petroleum Science and Engineering | Year: 2013

The generation mechanisms of complex fracture mesh and the mechanism of activating existing natural fractures during shale fracturing are studied based on rock fracture dynamics. It is found that steering conditions should be satisfied at both the left and right ends of a natural fracture to form an intensive fracture mesh after the induced hydraulic fracture reaches the natural fracture; there exists a minimum critical pump rate (critical pump rate) to form an intensive fracture mesh. The critical pump rate increases as the inclination of the natural fracture increases and reaches a maximum value (constant) when the inclination of the natural fracture is 90°. When the inclination of the natural fracture is less than 90°, the critical pump rate first decreases and then increases as the angle between horizontal wellbore and the natural fracture increases; the critical pump rate reaches a minimum value for the natural fractures perpendicular to the wellbore. The critical pump rate increases as natural the fracture length increases and the rock elastic modulus decreases. When hydraulic fractures reopen existing natural fractures, the release of the original shear stress in the fracture surface would lead to the fracture surface slippage, which would greatly enhance the flow conductivity of the natural fracture. Very small or very large inclination of natural fracture is not conducive to fracture activation, best activating result can be reached at 30-60° inclination. Rise in elastic modulus inhibits fracture surface slippage and Poisson's ratio has little effect on fracture surface slippage. © 2013 Elsevier B.V. Source


Wu G.,Petroleum Production Engineering Research Institute of Huabei Oilfield Company | Zhang L.L.,Petroleum Production Engineering Research Institute of Huabei Oilfield Company | Xie G.,Petroleum Production Engineering Research Institute of Huabei Oilfield Company | Zhang W.,Petroleum Production Engineering Research Institute of Huabei Oilfield Company | And 3 more authors.
Advanced Materials Research | Year: 2014

In view of high heterogeneity and complicated oil-water relation of fault block oil reservoirs, conventional technology of water plugging and profile controlling cannot well adapt to it. An oil-in-water emulsion for selective water plugging was designed by using emulsified heavy oil for reference and the aim was to improve the injection ability and plugging strength. The single core flooding results indicated that its breakthrough pressure gradient >26MPa/m,water plugging rate >97% after water flooding for 100 pore-volume. The parallels core flooding results indicated that it has good water flooding endurance than emulsified heavy oil, and can be used to the selective water plugging and profile controlling of heavy heterogeneous layers with the permeability ratio is no less than 7. Field application is successful. © (2014) Trans Tech Publications, Switzerland. Source


Lin S.,Bohai Petroleum Vocational College | Wu G.,Petroleum Production Engineering Research Institute of Huabei Oilfield Company | Zhang S.Y.,Petroleum Production Engineering Research Institute of Huabei Oilfield Company | Xie J.,Petroleum Production Engineering Research Institute of Huabei Oilfield Company | And 4 more authors.
Advanced Materials Research | Year: 2014

In order to utilize the beneficial Indigenous Microbial in objective reservoir, active formula systems with various nutriment components were investigated[1]. The results of performance evaluation showed that the activation, emulsification, viscosity break, and oil displacement performance of nutritional formula system were approved. Based on the field verification, the beneficial Indigenous Microbial in produced fluid of post treatment well array was activated, oil quality was improved, displacement efficiency was advanced, and oil production was increased. © (2014) Trans Tech Publications, Switzerland. Source


Ke C.-Y.,Xian Shiyou University | Ke C.-Y.,Petroleum Production Engineering Research Institute of Huabei Oilfield Company | Ke C.-Y.,East China University of Science and Technology | Wu G.,Petroleum Production Engineering Research Institute of Huabei Oilfield Company | And 4 more authors.
Oilfield Chemistry | Year: 2013

Based on the geological conditions,Water flooding characteristic and the current difficult of stable yield of Ba-19 fault block,Huabei Oilfield Company have employed the overall microbial circulating oil displacement technology by established stable microbial field in this block. Firstly, four strains of efficient production microbes were screened from target reservoir. The laboratory study indicated that the four kinds of microbes could not only well adapted to the reservoir environment, but also had the good viscosity reduction and emulsifying effect for crude oil. The gas chromatography (GC) analysis showed that the screened strains could use the crude oil as carbon source, and degrade long-chain hydrocarbons effectively. Especially by compounded these microbes according to equal proportions, the viscosity reduction rate reached up to 52.8%, and based on 49.5% oil recovery of the water flooding, the oil recovery was enhanced by 9.1% by physical model experiment. The microbial concentration in target reservoir reached 105-106 cells/mL and maintained over 8 months. The results demonstrated that the injected target microbes could grow and reproduce effectively in reservoir. The water cut was controlled lower than 85% and the oil recovery improved obviously. The cumulative incremental oil was 15000 t within 12 months,and the input-output ratio was up to 1: 2.5. Source

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