Mesoscopic Simulation of Rheology of Polymer Solution
Bibliographic record
Abstract
Mesoscopic Simulation of Rheology of Polymer Solution Xiaobo Li; Xiaobo Li PetroChina RIPED Search for other works by this author on: This Site Google Scholar Jie Song; Jie Song PetroChina RIPED Search for other works by this author on: This Site Google Scholar Jiangru Yuan; Jiangru Yuan PetroChina RIPED Search for other works by this author on: This Site Google Scholar Yang Dai Yang Dai PetroChina Company Limited Search for other works by this author on: This Site Google Scholar Paper presented at the International Oil and Gas Conference and Exhibition in China, Beijing, China, June 2010. Paper Number: SPE-131805-MS https://doi.org/10.2118/131805-MS Published: June 08 2010 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Li, Xiaobo , Song, Jie , Yuan, Jiangru , and Yang Dai. "Mesoscopic Simulation of Rheology of Polymer Solution." Paper presented at the International Oil and Gas Conference and Exhibition in China, Beijing, China, June 2010. doi: https://doi.org/10.2118/131805-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu nav search search input Search input auto suggest search filter All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE International Oil and Gas Conference and Exhibition in China Search Advanced Search Abstract The need for high performance polymers used in chemical EOR is increasing in some oil fields, especially in China. It is a challenging issue to simulation the flow of polymer solution through pores. What make the complexity of this problem are the multiple physical phenomenons that the transformations of macromolecule interact with the macroscopic flow. Both molecular and hydrodynamic effects are of important at this scale, but not all of which can be resolved by the traditional continuum-based approaches that involves solution of the Navier-Stokes equations with a phenomenological constitutive equation. Microscopic molecular dynamics, on the other hand, requires excessive calculation time before macroscopic effects become visible, and therefore dissipative particle dynamics (DPD) is used to simulate the rheological properties of polymer solution in our work. As a particle-based mesoscopic method, the DPD method is appropriate to study complex fluids including polymer or surfactant [1]. In this study, the polymer molecule was represented with a chain of beads connected with finite extensible nonlinear elastic (FENE) springs that led to viscoelastic flow, and the periodic Poiseuille flow method proposed by Backer et al [2] was applied to measure the viscosity of simulation system. The rheological properties of linear, branch- and star- polymers solution were simulated, and some factors including molecular weight, molecular topology and concentration were evaluated quantitatively. Besides that, the radius of gyration of polymers was recorded in simulations. In our opinion, the numerical instabilities of many conventional methods can be avoided in this approach, and the simulation results gave a clear physical insight into the flow of polymer solution. Keywords: simulation, polymer solution, society of petroleum engineers, upstream oil & gas, spe 131805, dissipative particle dynamic, rheology, rheological property, simulation result, enhanced recovery Subjects: Improved and Enhanced Recovery, Chemical flooding methods Copyright 2010, Society of Petroleum Engineers You can access this article if you purchase or spend a download.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.007 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".