Lu District Hutubihe Reservoir Chemical Flooding Eor Research

Lu 9th hutubi River group is a sort of bottom and edge reservoir with complex relations of oil and water and of sever heterogeneity. From water flooding , the composite water cut have reached at 45%, and inclined to rising. Aiming at control water coning resulted from bottom and edge reservoir and heterogeneity, and for improving oil recovery in Lu 9th well, the technical chemical flooding has been proposed.After references about the state of art of chemical flooding, we considered that polymer flooding, polymer/surfactant flooding, weak gel flooding system are suited to this oil reservoir.Firstly, based on the properties of viscosity-temperature, viscosity-concentration, viscosity-salinity and resistant-shearing, the selected hydrophobically associating water-soluble polymer series AP can satisfy the demand of reservoir polymer flooding, at the same time, the indoor physical simulator experiments indicate that the absorption rule of AP-P4 solution essentially consistent with Langmuir isothermal absorption rule. The polymer has a good adjustable with the permeability of reservoir simulator. which has good injection, spreads equally, and takes on more restraining fluidity capability and decreasing porous media permeability. The datum got from oil-flooding simulator experiments reveal that the flooding effect will be optimal, when injecting 0.25-0.35PV associating polymer(concentration is 1500mg/L).Secondly, by the indoor experiment test, we carry on the select of ten kinds of the surfactants, a surfactant that is suitable for Klh23 oil reservoir for single and compounded flooding system .The suitable polymer and surfactant compounded displacing liquid has been elected and according to the liquid of evaluation method, the fluxion characteristic research in porous media, we acquired its static adsorb, the dynamical resort and the resistant factor, the residual resistant factor parameter, and provide the related parameter and the theories leadings. Though the oil displacement simulation experiment, we design the suitable project for Klh23 oil reservoir.At the foundation of the polymer optimization, Aim at the condition of Klh23 oil reservoir, select the polymer and weak gel, which are fit for the oil reservoir in depth profile control cross-linking agent and polymer: AP series of Hydrobically associating polymer+ acetic acid system, Studied this kind of system through the physical simulation experiment researched the flow behavior and displacing experiment in porous, get that the system has a strong ability to adjust in-situ heterogeneity and inter-zonal heterogeneity. At the same time ,it can enhance the oil recovery .At last, aiming at Lu 9th well, we use the technology of reservoir numerical simulation and research on these technologies problems about chemical flooding, optimization of water flooding, proper liquid produced volume and so on, and providing technological date for optimization of oil reservoir. By use of ECLIPSE, a sort of data simulator software, compared with polymer flooding and polymer/surfactant compounded flooding in improving oilrecovery, we determined using polymer flooding at the research area-Hutubi River. 11-scheme as follows: slug volume : 225mg/L ? PV, forward slug volume 1700mg/Lx0.03PV. the. main slug volume 1500mg/Lx0.116 PV.The dissertation is basis on physical simulation indoor and reservoir numerical simulation. Aim at polymer flooding, polymer/surfactant flooding, weak gel flooding enhances oil recovery. To Klh23 reservoir's adaptation research, and advanced. The Polymer flooding is the best project. At the same time, optimized the construction parameter tJirc ?:■;■■;'■ numerical simulation, provide the theory basis for reservoir's stable production arc! , "-1> control.