Research for PAM as oil displacement - CHINAFLOC
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Research for PAM as oil displacement
2014-12-18 11:09:21

  Oilfield polymer flooding polymer products are mainly applied to partially hydrolyzed polyacrylamide HPAM. Generally believed polyacrylamide injected water can play a mediation rheology increase driven fluid viscosity and improve water flood sweep efficiency an important role. However, due to differences in the medium porosity and other geological conditions and groundwater ion composition and content of the molecular form polyacrylamide, molecular weight and put forward different requirements. Polyacrylamide products integrated performance will directly affect the technical and economic effects of polymer flooding. Eleven physical and chemical properties of conventional polymer evaluation method has been fully adopted not effectively identify and accurately evaluate the suitability of various polymer products Oilfield. Due to the ultra-high molecular weight polymer and salt and low molecular weight polymer and salt and other new polymers were introduced at the molecular chain functional groups, compared with the conventional polymer solution properties which appear significant changes. Accuracy decreases leading to conventional detection methods, adaptive deteriorated. The main purpose of this project is to establish an absolute method of polyacrylamide (PAM) and hydrolyzed polyacrylamide (HPAM) molecular testing by static light scattering studies, research ionic microenvironment, mines and other real environment on the basis of polyacrylamide Effect of molecular size and the feasibility of on-line light scattering detector GPC- polymer molecular weight distribution, and research related to the nature of different structures of the aqueous polymer solution. The main contents include: determining the light scattering experiments and evaluate the conditions of the test results on the viscosity of law; the impact of ions in solution concentration on the molecular size of the second viral coefficients; polymer solution Θ conditions exploration; GPC- light scattering in combination with injected evaluation was taken out and the polymer molecular weight distribution. Most of the low molecular weight polyacrylamide filter factor to meet the original standard indicators, so it’s no adjustment. For ultra-high molecular weight polyacrylamide filter factor to make the appropriate anti-wide index, based on the findings, we believe that the polymer molecular weight between 1600-1900 square filter factors raised to 3.0 is appropriate for molecular weight greater than 19 million is not yet done regulations. For different times and in different types (including hydrophobic associative polymer, ultra-high molecular weight polymer and salt, low molecular weight polymer and salt, etc.) of the new products launched a solid polymer salt content, viscosity retention rate eleven evaluation of physical and chemical properties, and with the molecular weight of the polymers were developed preliminary performance comparison and set flooding index requirements and test methods with the new salt polymer properties. Combined with infrared, mass spectrometry, chromatography, light scattering and other advanced technology, the first of the structure of the polymer composition of various qualitative analysis to identify the influence of structural changes in the composition of the solution properties. Then, according to the actual needs of the detection method to study and propose high accuracy, wide scope of application. Through a comprehensive evaluation of the indoor physical and chemical properties of different polymers, including tolerance, shear resistance, stability, resistance coefficient and residual resistance factor, core flooding experiments, including the effects. Several selected for the preparation of polymer flooding in sewage novel polymer products. Preferred out salt polymer showed good physical and chemical properties, salt resistance, shear resistance, viscoelasticity, stability and good interior flooding experiment results. Ultra high molecular weight polymer molecules in salt water and wastewater have a network structure, has good elasticity and a high viscosity oil displacement effect formulated with the polymer solution, indicating that network molecular structure is conducive to improvement of the polymer solution viscoelasticity. Associative polymers with different molecular weight polymer, the molecules dissolved and dispersed in an aqueous solution, its viscosity molecular weight of the polymer system is not as fast as the viscosity tends to be constant, but gradually over time increased gradually because the association between the molecules together will take some time. In order to make better use of water and high calcium and magnesium in the water for the preparation of low molecular weight polymer and salt, to improve the low-permeability layer polymer flooding effect, to carry out physical and chemical properties, the sewage system increased viscosity, flow properties, including the effect of core flooding rheological and viscoelastic properties including comprehensive research work indoors