Polymer degradation is critical for polymer flooding because it can significantly influence the viscosity of a solution, which dominant property enhanced oil recovery (EOR). In this work, physical experiments and numerical simulations were both used to study partially hydrolyzed polyacrylamide (HPAM) its effect on in heterogeneous reservoirs. First, conducted determine basic physicochemical properties polymer, including degradation. Notably, novel dynamic experiment was recommended...

As global energy demand grows, the oil and gas industry faces increasing challenges in optimizing production while achieving sustainability. Accurate well forecasting is essential for effective resource management operational decision-making. However, traditional mathematical models struggle with nonlinear dynamic characteristics of data, existing hybrid neural networks often lack sensitivity to changes suffer from overcomplexity due numerous parameters. This study proposes a novel model,...

Abstract Recently, substantial technical progress has been made to solve complex tasks in the field of artificial intelligence (AI) by incorporating deep neural networks into reinforcement learning (RL). In this paper, four state-of-the-art RL algorithms are applied optimize net present value (NPV) waterflooding (WF) under geological uncertainties adjusting water injection rate. They include Q-network (DQN), double DQN (DDQN), dueling DDQN, and deterministic policy gradient (DDPG). A set...

Biosurfactants are expected to be a key factor for microbial enhanced oil recovery (MEOR). In this study, we described the novel biosurfactant-producing strain Brevibacillus borstelensis YZ-2 isolated from low permeability reservoir. We purified and characterized biosurfactants produced by via thin-layer chromatography MALDI-TOF-MS, revealing them fengycins. additionally used Box-Behnken design approach optimize fermentation conditions in order maximize production. Core flooding experiments...

To overcome limitations inherent in existing mechanical performance prediction models for pervious concrete, including material constraints, limited applicability, and inadequate accuracy, this study employs a deep learning approach to construct Convolutional Neural Network (CNN) model with three convolutional modules. The primary objective of the is precisely predict 28-day compressive strength concrete. Eight input variables, encompassing coarse fine aggregate content, water admixture...

As the demands of tight-oil Enhanced Oil Recovery (EOR) and controlling anthropogenic carbon emission have become global challenges, Carbon Capture Utilization Sequestration (CCUS) has been recognized as an effective solution to resolve both needs. However, influential factors dioxide (CO2) geological storage in low permeability reservoirs not fully studied. Based on core samples from Huang-3 area Ordos Basin, feasibility CO2 sequestration are analyzed through caprock breakthrough tests a...

Based on 454 pyrosequencing of 16S rRNA gene amplicons, microbial communities in samples collected from seven wells, six which had positive paraffin deposition reduction and one with negative upon a treatment designed for the prevention precipitation, were analyzed. Microbial communities' structures significantly different well wells. Microbes affiliated Diaphorobacter belonging to β-Proteobacteria predominant well, While γ-Proteobacteria-affiliated microbes Pseudomonas Enterobacter...

Aiming to solve the problems of poor CO2 displacement efficiency and serious gas-channeling low well-opening rates in ultra-low permeability reservoirs, we carry out experiments under different reservoirs by using development methods, water drive gas procedures, fracture positions clarify effects physical formation properties, injection parameters on C8 reservoirs. The experimental results show that recovery degree miscible increases with an increase permeability. When gas–oil ratio is...

In this paper, cyclic solvent injection (CSI) and waterflooding (WF) were combined studied to maximize their technical synergy optimize the enhanced heavy oil recovery (EHOR) in post-cold production with sand (CHOPS) reservoirs. The original sample was collected from Colony formation western Canada. PVT data viscosities of CH4/CO2/C3H8-saturated measured at different equilibrium pressures Tres = 21 °C. A total eight sandpacked laboratory tests conducted study compare four EHOR processes...

Accurate prediction of crude petroleum production in oil fields plays a crucial role analyzing reservoir dynamics, formulating measures to increase production, and selecting ways improve recovery factors. Current methods mainly include engineering methods, numerical simulation deep learning the required prerequisite is large amount historical data. However, when data used train model are insufficient, effect will be reduced dramatically. In this paper, time series-related meta-learning...

In this paper, physical experiments and numerical simulations were applied to systematically investigate the non-Newtonian flow characteristics of heavy oil in porous media. Rheological carried out determine rheology oil. Threshold pressure gradient (TPG) measurement performed by a new micro-flow method conducted study effect viscosity, permeability mobility on An in-house developed novel simulator considering was designed based experimental investigations. The results from indicated that...

Carbon neutrality has become the long-term development strategy of many countries worldwide, and widespread implementation CCUS (carbon capture, utilization, storage) is critical for achieving this goal. Ultralow permeability reservoirs have good storage shielding properties, making them ideal CO2 geological storage. into these dual purpose improving crude oil recovery protecting environment. However, physical properties ultralow are poor. Furthermore, distribution fractures often complex....

The flow of polymer solution and heavy oil in porous media is critical for flooding reservoirs because it significantly determines the enhanced recovery (EOR) efficiency reservoirs. In this paper, physical experiments numerical simulations were both applied to investigate partially hydrolyzed polyacrylamide (HPAM) oil, their effects on First, determined rheology media. Then, a new mathematical model was proposed, an in-house three-dimensional (3D) two-phase simulator designed considering...

Polymer flooding (PF) in heterogeneous heavy oil reservoirs is not only closely related to polymer degradation, but also non-Newtonian flow. In this paper, both experimental and simulation methods are combined investigate type of flooding. Through experiments, the degradation polymer, rheological properties fluids, flow fluids porous media were determined. Based on results, a novel mathematical model was established, new PF simulator designed, validated, further applied study effects...

Influenced by water injection, a dominant flow channel is easily formed in the high cut stage of conglomerate reservoir, resulting inefficient or ineffective circulation injected water. With gel flooding as one effective development methods to solve above problems, its parameter optimization determines final effect, which still faces great challenges. A new method for proposed this paper. Firstly, parameters were obtained through physical experiments; then, an experimental model was...

Shallow- and thin-layer heavy oil reservoirs are characterized by their shallow burial, thin thickness, high viscosity, scattered distribution. After years of steam injection development, several issues have emerged, including a highly comprehensive water cut in the reservoir serious channeling. Therefore, there is an urgent need to change development approach enhance crude recovery. It has been discovered that developing through nitrogen foam-assisted flooding can effectively address...

Due to the spatial network structure, heavy oil has a high threshold pressure gradient when it flows through porous media, and plays crucial role in distribution of remaining oil. In previous study, common methods measure include microflow-established differential (MFEDP) method, capillary equilibrium percolation curve fitting method. this sample from SZ36-1 oilfield was analyzed for basic physical properties based on comparison measurement study influence mobility then an independently...

Fracture-vuggy carbonate reservoirs commonly exhibit sufficient bottom water energy and are characterized by fractures or other interconnected channels with water, which can easily cause high cut in oil wells during production. The main reasons as follows: firstly, coning leads to flooding. Secondly, artificial injection flooding fails shows This paper further clarifies the causes of fractured-vuggy explores rational feasible management strategies improve current situation reduce...

Enterobacter mori strain 5–4 is a Gram-negative, motile, rod shaped, and facultatively anaerobic bacterium, which was isolated from mixture of formation water (also known as oil-reservior water) crude-oil in Karamay oilfield, China. To date, there only one E. genome has been sequenced very little knowledge about the mechanism adapted to petroleum reservoir. Here, we report second sequence annotation, together with description features for this organism. The 4,621,281 bp assembly exhibits G +...

Reservoir characterization, which could be broadly defined as the process describing various reservoir characters based on all available data. The data may come from diverse source, including core sample experiment result, well log data, test tracer and production 2D, 3D vertical seismic bore tomography, out crop analogs, etc. Ideally, if most of those are analyzed included in description would better. However, not at same time. This paper provides a characterization analysis early-stage...