Tight oil is a typical unconventional resource, and enhancing its recovery rate remains a challenge in current development efforts. In this study targeting the Daqing Fuyu tight oil reservoir, we combine a high-temperature and high-pressure long core physical simulation apparatus and a high-temperature and high-pressure online Nuclear Magnetic Resonance (NMR) testing system to conduct indoor simulation experiments on CO huff and puff in long cores. The results indicate that in the process, it is primarily the oil from micro-pores that is initially mobilized, but further along mobilization of fluids from a portion of sub-micro-pores and nanopores is enhanced, with an efficiency ranging from 25 to 33 %. It was also found that there exist optimal conditions for huff and puff pressure, soaking time, and huff and puff cycles. Additionally, excessive extraction of light components by CO can prove disadvantageous for further improvement in huff and puff efficiency. This study can provide insight into the mechanisms of and data support for the development of CO huff and puff strategies in tight oil reservoirs, thereby contributing to the formulation of effective development plans.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11693881 | PMC |
| http://dx.doi.org/10.1016/j.heliyon.2024.e40183 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Experimental study on CO huff and puff in the Daqing Fuyu tight oil reservoir with online NMR.
Heliyon
November 2024
Chongqing University of Science and Technology, Chongqing, 401331, China.
Tight oil is a typical unconventional resource, and enhancing its recovery rate remains a challenge in current development efforts. In this study targeting the Daqing Fuyu tight oil reservoir, we combine a high-temperature and high-pressure long core physical simulation apparatus and a high-temperature and high-pressure online Nuclear Magnetic Resonance (NMR) testing system to conduct indoor simulation experiments on CO huff and puff in long cores. The results indicate that in the process, it is primarily the oil from micro-pores that is initially mobilized, but further along mobilization of fluids from a portion of sub-micro-pores and nanopores is enhanced, with an efficiency ranging from 25 to 33 %.
View Article and Find Full Text PDFCO Utilization and Sequestration in Organic and Inorganic Nanopores During Depressurization and Huff-n-Puff Process.
Nanomaterials (Basel)
October 2024
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China.
CO injection in shale reservoirs is more suitable than the conventional recovering methods due to its easier injectivity and higher sweep efficiency. In this work, Grand Canonical Monte Carlo (GCMC) simulation is employed to investigate the adsorption/desorption behavior of CH-CH and CH-CH-CO mixtures in organic and inorganic nanopores during pressure drawdown and CO huff and puff processes. The huff and puff process involves injecting CO into the micro- and mesopores, where the system pressure is increased during the huffing process and decreased during the puffing process.
View Article and Find Full Text PDFNumerical Simulation Study on Flue Gas-Assisted Steam Huff and Puff in Heavy Oil Reservoirs.
ACS Omega
September 2024
Petroleum Development Center, Shengli Oilfield, Dongying 257001, China.
In response to challenges such as the rapid rise of water content, the rapid decline of periodic production, and the serious intrusion of edge and bottom water in heavy oil reservoirs after multicycle profile control, the flue gas-assisted steam huff and puff technology is proposed. By focusing on Block Cao128 in the L Oilfield as a research subject, the feasibility of applying the flue gas-assisted steam huff and puff technology in heavy oil reservoirs has been verified through the establishment of a three-dimensional geological model. Additionally, the injection and production parameters in steam huff and puff have been optimized.
View Article and Find Full Text PDFResearch on Mechanism and Effect of Enhancing Gas Recovery by CO Huff-n-Puff in Shale Gas Reservoir.
ACS Omega
July 2024
Shale Gas Research Institute, PetroChina Southwest Oil & Gas Field Company, Chengdu 610051, China.
The technology of CO-enhanced gas recovery (CO-EGR) plays a pivotal role in the CCUS (Carbon Capture, Utilization, and Storage) industry, which helps to achieve a win-win situation of economic benefit and environmental benefit for gas fields. Shale gas reservoirs, with their unique geological and surface engineering advantages, are one of the most promising options for CCUS implementation. Focusing on shale formations within the mid-deep blocks of the Sichuan Basin, this study conducted competitive adsorption experiments using multicomponent gases.
View Article and Find Full Text PDFMolecular Insights into Soaking in Hybrid N-CO Huff-n-Puff: A Case Study of a Single Quartz Nanopore-Hydrocarbon System.
Langmuir
July 2024
College of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
Hybrid N-CO huff-n-puff (HnP) has been experimentally demonstrated to be a promising approach for improving oil recovery from tight/ultratight shale oil reservoirs. Despite this, the detailed soaking process and interaction mechanisms remain unclear. Adopting molecular dynamic simulations, the soaking behavior of hybrid N-CO HnP was investigated at the molecular and atomic levels.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!