Petroleum Research最新文献

{"title":"Recent developments, challenges, and prospects of carbon dots (CDs) for fluid flow investigation in porous media","authors":"Mehdi Razavifar ,&nbsp;Ali Khoshsima ,&nbsp;Masoud Riazi ,&nbsp;James J. Sheng ,&nbsp;Ehsan Esmaeilnezhad","doi":"10.1016/j.ptlrs.2024.04.004","DOIUrl":"10.1016/j.ptlrs.2024.04.004","url":null,"abstract":"<div><div>Carbon nanostructures exhibit unique physicochemical properties and play a significant role in modern and advanced technologies. Carbon dots (CDs) are a subset of carbon-based particles less than 20 nm in size. In this study, a comprehensive review was performed on the applications of CDs for fluid flow investigations in porous media. CD technology provides precious information about the heterogeneity and permeability of the rock and the existence of a sealed part between the wells in the hydrocarbon reservoir. Studying the volume and flow potential of aquifers is another application of CD in fluid flow study. CDs can be used as an additive in the fluid to modify the chemical or physical properties. Adding CD to injected fluid in the reservoir can change the rheological properties of the fluid and reduce its viscosity. CD injection as a nanofluid in the reservoir rock increases the oil recovery factor and decreases injection pressure due to the change in the wettability of rock from oil-wet to water-wet and the reduction of interfacial tension between the fluids. The mobility and performance of CDs in pore scale are related to some parameters including ionic strength, pH, pore size distribution, and type of fluids in porous media.</div></div>","PeriodicalId":19756,"journal":{"name":"Petroleum Research","volume":"9 4","pages":"Pages 553-564"},"PeriodicalIF":0.0,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Machine learning classification algorithm screening for the main controlling factors of heavy oil CO2 huff and puff","authors":"Peng-xiang Diwu ,&nbsp;Beichen Zhao ,&nbsp;Hangxiangpan Wang ,&nbsp;Chao Wen ,&nbsp;Siwei Nie ,&nbsp;Wenjing Wei ,&nbsp;A-qiao Li ,&nbsp;Jingjie Xu ,&nbsp;Fengyuan Zhang","doi":"10.1016/j.ptlrs.2024.04.002","DOIUrl":"10.1016/j.ptlrs.2024.04.002","url":null,"abstract":"<div><div>CO₂ huff and puff technology can enhance the recovery of heavy oil in high-water-cut stages. However, the effectiveness of this method varies significantly under different geological and fluid conditions, which leads to a high-dimensional and small-sample (HDSS) dataset. It is difficult for conventional techniques that identify key factors that influence CO₂ huff and puff effects, such as fuzzy mathematics, to manage HDSS datasets, which often contain nonlinear and irremovable abnormal data. To accurately pinpoint the primary control factors for heavy oil CO₂ huff and puff, four machine learning classification algorithms were adopted. These algorithms were selected to align with the characteristics of HDSS datasets, taking into account algorithmic principles and an analysis of key control factors. The results demonstrated that logistic regression encounters difficulties when dealing with nonlinear data, whereas the extreme gradient boosting and gradient boosting decision tree algorithms exhibit greater sensitivity to abnormal data. By contrast, the random forest algorithm proved to be insensitive to outliers and provided a reliable ranking of factors that influence CO₂ huff and puff effects. The top five control factors identified were the distance between parallel wells, cumulative gas injection volume, liquid production rate of parallel wells, huff and puff timing, and heterogeneous Lorentz coefficient. These research findings not only contribute to the precise implementation of heavy oil CO₂ huff and puff but also offer valuable insights into selecting classification algorithms for typical HDSS data.</div></div>","PeriodicalId":19756,"journal":{"name":"Petroleum Research","volume":"9 4","pages":"Pages 541-552"},"PeriodicalIF":0.0,"publicationDate":"2024-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Laser drilling through Hashma sandstone","authors":"Mohamed Hosin ElNeiri ,&nbsp;Abdel Sattar Abdel Hamid Dahab ,&nbsp;Abdulaziz Mohamed Abdulaziz ,&nbsp;Khalid Mahmoud Abdelghany","doi":"10.1016/j.ptlrs.2024.04.003","DOIUrl":"10.1016/j.ptlrs.2024.04.003","url":null,"abstract":"<div><div>The application of laser in the drilling and perforation of oil wells can achieve great benefits such as reduced drilling costs and time with a higher rate of penetration (ROP) and elimination of casing necessity in oil and gas well drilling. This paper presents an original experimental investigation of Laser cutting through Hashma sandstone (a common quarry rock in Egypt) to develop a good understanding of the laser cutting process in sandstone. Five blocks of Hashma sandstone with dimensions of 35 cm × 35 cm × 10 cm were utilized to study the effects of the various parameters involved in the lasing (cutting) process in order to evaluate the cutting process through sandstone, investigate the effect of laser parameters on the process and the cutting mechanisms. The experimental results showed that the laser drilling can provide lower specific energy (SE) compared to conventional drilling methods, revealed the effect of various laser and rock parameters (such as beam power, intensity, duration, sample size, and orientation) on the cutting process, and demonstrated the laser cutting mechanisms through sandstone such as thermal spallation and melting mechanisms. Several parameters must be optimized for an optimum laser cutting process with the lowest SE, such as using the optimum beam power, beam duration (or Lasig time), and beam mode (continuous or pulsed). The optimum parameters may change from one case to another and depend on the overall interactions among the various variables such as thermal dissipation rate and purging system efficiency.</div></div>","PeriodicalId":19756,"journal":{"name":"Petroleum Research","volume":"9 4","pages":"Pages 673-685"},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140765526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The discrete-imitation modeling concept of the “sucker-rod pump-well-reservoir” system and the optimization of the pumping process","authors":"Mahammad A. Jamalbayov ,&nbsp;Nazim A. Valiyev","doi":"10.1016/j.ptlrs.2024.04.001","DOIUrl":"10.1016/j.ptlrs.2024.04.001","url":null,"abstract":"<div><div>A new approach to dynamic modeling based on a discrete-imitation concept has been developed. The fundamentals, including terms and principles of the concept, have been explained. The presented concept has been applied to the integrated modeling of the development of a volatile oil reservoir operated by a sucker-rod pumping well within a pump-well-reservoir system. The discrete-imitation model of the “pump-well-reservoir” system, developed based on the principles of the new concept, takes into account fluid flow between the annulus and the lifting bore. It was employed to investigate the operation of the sucker-rod pumping well. The correlation between pumping rate, pump fillage, and stroke speed has been investigated. It was observed that, as the stroke speed increases, both pump performance and pump fillage increase up to a certain point. Beyond this threshold, the pumping rate stabilizes, and the pump fillage experiences a sharp decline. Notably, the maximum pump fillage does not always align with the peak pumping rate. In such instances, achieving an optimal regime is possible only through intermittent pumping. An expression has been derived to determine the optimal pump idle time in intermittent mode.</div></div>","PeriodicalId":19756,"journal":{"name":"Petroleum Research","volume":"9 4","pages":"Pages 686-694"},"PeriodicalIF":0.0,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140769849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental investigation of the impact of soybean oil-derived surfactant as a surface-active agent during gas well deliquification","authors":"Gbadegesin Abioun Adeyemi,&nbsp;Kegang Ling,&nbsp;Adesina Fadairo","doi":"10.1016/j.ptlrs.2024.03.007","DOIUrl":"10.1016/j.ptlrs.2024.03.007","url":null,"abstract":"<div><div>The inability of the gas rate to overcome the gas critical (minimum) flow rate leads to liquid loading in a gas well. To avoid premature well shut-in, the injection of surfactants is one of the standard methods used in gas well deliquification, although many commercial surfactants pose environmental toxicity concerns. This project investigates the suitability of biosurfactants in generating foam that will reduce the surface tension of the liquid by adsorbing at the liquid-gas interface to create a more significant mass than the liquid droplets which can be easily extracted from the walls of the wellbore. An experimental setup simulating gas well conditions introduce a surfactant derived from soybean oil, subjecting it to tests for foam stability, unloading efficiency, and dynamic surface tension. The results from the modified ASTM D-892 test show that Soybean Oil Derived Surfactant (SODS) exhibits promising surface tension reduction properties and effectively alters the gas-liquid interface. With the increase in concentration from 200 ppm, 400 ppm, and 600 ppm, the expelled water increased from 17%, 28%, and 70% respectively. Similarly, Gao-Rosen adsorption isotherms confirmed SODS appropriate for the prediction of the adsorption from solution with the R² values of approximately 1.0. This study introduces a cost-effective and environmentally friendly surfactant that performs favorably for gas well deliquification.</div></div>","PeriodicalId":19756,"journal":{"name":"Petroleum Research","volume":"9 4","pages":"Pages 489-501"},"PeriodicalIF":0.0,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140399612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reservoir identification of marine facies carbonate shoals in the Middle Permian in the Sichuan Basin","authors":"Yunbo Zhang ,&nbsp;Yan Feng ,&nbsp;Miao Miao ,&nbsp;Xingying Yu ,&nbsp;Xufeng Liu ,&nbsp;Mingjian Wang ,&nbsp;Li Sun","doi":"10.1016/j.ptlrs.2024.03.009","DOIUrl":"10.1016/j.ptlrs.2024.03.009","url":null,"abstract":"<div><div>Controlled by the base level change cycle, the carbonates exposed from the periodically shallowed water body at the top of the high-frequency sequence develops multiple sets of thin reservoirs. Such reservoir identification has always been tricky in the prediction of carbonate reservoirs. Based on the Middle Permian strata from the Sichuan Basin, this paper established a forecasting approach of high-frequency-sequence-controlled carbonate thin reservoir. The steps are as follows: (1) Combine the measured results of samples from the typical outcrops with changes of carbon and oxygen isotopes, thus to construct a division program for the 3rd-order sequence of the Middle Permian strata. (2) Compare the carbon and oxygen isotope changes and the global sea level change trend, determine the controlling factors of the 3rd-order sequences. (3) Carry out spectrum analysis based on the natural gamma energy spectrum logging (ln (Th/K)) curves of Wells Long-17 and Anping-1 to establish a high-frequency sequence framework division program, and then apply the logging curve characteristics to correct the top interface positions of the high-frequency sequences, which is the potential location of carbonate reservoir. The research results suggest that the Middle Permian in the Sichuan Basin can be divided into three 3rd-order sequences, which are PSQ1, PSQ2 and PSQ3 from bottom to top. Among which, PSQ1 is mainly affected by global sea level (GSL) changes, and the changes originated from its tuning curve can be directly applied to the division of high-frequency sequences and reservoir prediction. PSQ2 and PSQ3 are jointly controlled by global sea level changes and regional tectonics. In cope with the influence of regional tectonics, the positions of the four-level sequence interface established according to the tuning curve need to be fully considered, and good results were achieved through systematical correction. This method can effectively reduce the risk of reservoir prediction caused by marine carbonate heterogeneity, and provide scientific foundation for the prediction of high-frequency cyclic reservoirs of platform facies and platform margin subfacies in other marine carbonate sedimentary basins.</div></div>","PeriodicalId":19756,"journal":{"name":"Petroleum Research","volume":"9 4","pages":"Pages 502-513"},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140403153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of gas lift system for well performance improvement in Asmari formation: A techno-economic perspective","authors":"Hari Sreenivasan,&nbsp;Jash Patel,&nbsp;Dev Jain,&nbsp;Setu Patel,&nbsp;Isaac Wilson,&nbsp;Shanker Krishna","doi":"10.1016/j.ptlrs.2023.08.003","DOIUrl":"10.1016/j.ptlrs.2023.08.003","url":null,"abstract":"<div><p>Well productivity in the Asmari carbonate formation of southwest Iran has decreased in recent years as a result of production issues. The production rate must be maintained below 1500 STB/day to prevent water coning. In this study, a gas lift well is modeled using data from one of the producing wells of this field. Nodal analysis is performed using lift-gas injection rates and wellhead pressures at different reservoir pressures and water cut conditions to optimize production. Economic aspects are considered to optimize the artificial gas injection rates at different tubing head pressures and water cut conditions. Increasing the lift-gas injection rate from 0.4 MMscf/day to 1 MMscf/day enhances the oil production rate by 37.71% and 43.89% for 10% and 30% water cut conditions, respectively. Gas injection rates of 5.2 MMscf/day and 5.4 MMscf/day are determined to be economically optimal for 30% water cut with tubing head pressures of 260 psig and 270 psig, respectively.</p></div>","PeriodicalId":19756,"journal":{"name":"Petroleum Research","volume":"9 1","pages":"Pages 115-124"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S209624952300056X/pdfft?md5=1d5813dd963fc2913594682da4bb05dd&pid=1-s2.0-S209624952300056X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54962341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A contrasting analysis of CO2 and N2 foam flood for enhanced oil recovery and geological storage of CO2","authors":"Alireza Roozbahani ,&nbsp;Farshad Soofivand ,&nbsp;Ali Sagban Hassoon Al-Tameemi ,&nbsp;Hadi Abdollahi ,&nbsp;Sogand Saatchi ,&nbsp;Abdolhamid Ansari","doi":"10.1016/j.ptlrs.2023.07.003","DOIUrl":"10.1016/j.ptlrs.2023.07.003","url":null,"abstract":"<div><p>Foam flooding using CO₂ has emerged as a promising method for both enhanced oil recovery (EOR) and the storage of CO₂ in geological reservoirs. This study conducts a thorough analysis of the behavior of CO₂ and N₂ foams in bulk and porous media, utilizing bubble-scale analyses and foam flooding experiments. The study compares the foamability and longevity of CO₂ and N₂ foams, with findings indicating that N₂ foam bubbles tend to be smaller and less varied in size than CO₂ foam bubbles, leading to increased foam stability. Additionally, the study compares the half-lives of CO₂ and N₂ foams generated through sparging and winding methods, showing that N₂ foam has half-lives 22 and 10 times greater than CO₂ foam when produced using the sparging and winding methods, respectively. Furthermore, CO₂ foam generated through the sparging method had a lower foaming volume than N₂ foam due to CO₂'s solubility. In the foam flooding experiments, N₂ foam proved more effective in recovering oil from porous media than CO₂ foam, thus demonstrating the effectiveness of the foam injection procedure. These results offer valuable insights into the differing performance of N₂ and CO₂ foam floods for EOR and CO₂ geological storage.</p></div>","PeriodicalId":19756,"journal":{"name":"Petroleum Research","volume":"9 1","pages":"Pages 55-60"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2096249523000509/pdfft?md5=f64ab280bb864808a823037a135c2d76&pid=1-s2.0-S2096249523000509-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47009673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diverting agents in the oil and gas industry: A comprehensive analysis of their origins, types, and applications","authors":"Namrata Bist ,&nbsp;Abhishek Nair ,&nbsp;Kriti Yadav ,&nbsp;Anirbid Sircar","doi":"10.1016/j.ptlrs.2023.09.004","DOIUrl":"10.1016/j.ptlrs.2023.09.004","url":null,"abstract":"<div><p>During the life of a well, treatments are carried out to boost productivity by stimulating initially unproduced zones. These treatments include hydraulic fracturing, matrix acidization, and acid fracturing, among others. Hydraulic fracturing treatment is generally applied to deeper reservoirs of oil or natural gas for enhanced recovery. By infusing proppant, water, and chemicals under extreme pressure during the fracturing procedure, fissures in and beneath the reservoir layer can be accessed and expanded. Another stimulating procedure, matrix acidization, involves injecting acid down the drilling hole to permeate the rock fissures at stresses lower than the fracture stress. In addition, carbonate reservoir acid fracturing stimulation is commonly used as an acid treatment technique whereby a pressure greater than the formation disintegration pressure or spontaneous fracture closure pressure is used to compress acid into the reservoir. These treatments allow existing wells to sustain hydrocarbon production without new wells being drilled. Diverters, when employed efficiently, can prevent the need to use a rig to provide momentary physical barriers, thus lowering the cost of the workover. Recent improvements in diversion technology make use of a variety of degradable particles that act as momentary bridges, either at the perforation entries or inside the existing fractures. The aim of this study is to introduce different types of mechanical and chemical diverters used to enhance the productivity of wells. This study explains the concepts of different types of diverters and their applications in several formations, it will also help readers to understand the selection procedures based on the suitability and requirements of diverter use by case studies from around the world.</p></div>","PeriodicalId":19756,"journal":{"name":"Petroleum Research","volume":"9 1","pages":"Pages 72-84"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2096249523000698/pdfft?md5=c364d39a44663ee6018035939df8f4ed&pid=1-s2.0-S2096249523000698-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134917758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Voids size distribution in gelled waxy crude oil under dynamic and static cooling","authors":"Girma T. Chala ,&nbsp;Shaharin A. Sulaiman","doi":"10.1016/j.ptlrs.2023.08.001","DOIUrl":"10.1016/j.ptlrs.2023.08.001","url":null,"abstract":"<div><p>Waxy crude oil is known for its high wax contents that can potentially result in gelling following sufficient cooling of the transportation line in the subsea bed at offshore fields. The gelling over the entire lines requires an accurately predicted restart pressure to restart the clogged and idle system. However, the common way of predicting the restart pressure has been reported to result in over-designed and predicted piping parameters. Recent research findings evidenced the formation of voids which would reduce the restart pressure significantly. The study conducted in this paper is aimed at investigating the voids size distribution in gelled crude oil across and along transportation pipelines. Sets of experiments simulating crude oil transportation during both static and dynamic cooling were conducted. The gelled crude oil below the pour point temperature was then scanned using a Magnetic Resonance Imaging (MRI) system to detect the voids formed. The resulting voids at each scanning cross-section were quantified, and their distributions were investigated. It was observed that dynamic cooling had minimal impacts on the voids size difference along the pipeline with the difference in voids areas within 10 mm² to be twice and uniform for the entire flow rates tested. However, voids size in statically cooled waxy crude oil was found to be highly distributed with a maximum of 6 voids size distribution in 10 mm² ranges. The low-end temperature had the highest size difference while the difference was decreasing with higher end temperatures. This study shows that the voids amount in dynamically cooled waxy crude oil could also be estimated with lower numbers of cross-sectional voids areas. However, the higher cross-sectional voids detection is recommended while estimating voids in statically cooled waxy crude oil.</p></div>","PeriodicalId":19756,"journal":{"name":"Petroleum Research","volume":"9 1","pages":"Pages 109-114"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2096249523000546/pdfft?md5=1bb28743384473d4400d572368655556&pid=1-s2.0-S2096249523000546-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44280806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}