A New Productivity Evaluation Method for Horizontal Wells in Offshore Low-Permeability Reservoir Based on Modified Theoretical Model DOI Open Access
Li Li,

Mingying Xie,

Weixin Liu

et al.

Processes, Journal Year: 2024, Volume and Issue: 12(12), P. 2830 - 2830

Published: Dec. 10, 2024

In the early stages of offshore low-permeability oil field development, it is crucial to ascertain productivity production wells select high-production, high-quality reservoirs, which affects design development plan. Therefore, accurate evaluation well essential. Drill Stem Testing (DST) only way obtain true but conducting DST in oilfields extremely costly. This article introduces a novel method for horizontal reservoirs based on an improved theoretical model, relieves limitations traditional methods. Firstly, new model derived, with consideration effects threshold pressure gradient, stress sensitivity, skin factor, and formation heterogeneity fluid flow reservoirs. Then, profiles are classified differences permeability distribution sections. Thirdly, equation modified by calculating correction coefficients maximize model’s accuracy. Based overdetermined concepts existing data, derived this paper x1 = 3.3182, x2 0.7720, x3 1.0327. Finally, proposed successfully applied reservoir nine wells, increasing accuracy from 65.80% 96.82% compared Production Index (PI) method. technology provides approach evaluating

Language: Английский

Information and Analytical System Monitoring and Assessment of the Water Bodies State in the Mineral Resources Complex DOI Creative Commons
Olga Afanaseva,

Mikhail Afanasyev,

Semyon Neyrus

et al.

Inventions, Journal Year: 2024, Volume and Issue: 9(6), P. 115 - 115

Published: Nov. 12, 2024

Currently, one of the most pressing global issues is ensuring that human activities have access to water resources meet essential quality standards. This challenge addressed by implementing a series organizational and technical measures aimed at preserving ecology basins reducing level harmful industrial emissions other pollutants in aquatic environment. To guarantee necessary resources, monitoring conducted based on selected parameters using various methods means control. From these results, suitable are formulated applied maintain quality. Various scientific works extensively discuss different approaches management compliance with specified requirements. Modern strategies for developing systems leverage capabilities information collect, process, store, transmit information, enabling resolution geographically distributed bodies real time. paper proposes an approach employs mathematical identify significant factors determining assess their interrelations priori ranking, multivariate correlation regression analysis, integral quantitative assessment. A hardware software solution development unified integrated analytical system proposed. enables continuous assessment set key parameters, addressing range critical tasks. provides detailed description product, presents demonstration real-world data, discusses anticipated benefits such system.

Language: Английский

Citations

11

Pour point depressant efficacy for diesel fuels with different n-paraffin distribution DOI
Kirill A. Kuzmin,

Aleksey S. Ivkin,

Mikhail A. Vovk

et al.

Fuel, Journal Year: 2025, Volume and Issue: 392, P. 134885 - 134885

Published: March 1, 2025

Citations

0

Review of Advances and Applications of Weighted Fracturing Fluid Technology DOI
Yang Bai, Lingfeng Wu,

Pingya Luo

et al.

Geoenergy Science and Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 213847 - 213847

Published: March 1, 2025

Language: Английский

Citations

0

Development of the Separation Column’s Temperature Field Monitoring System DOI Creative Commons

Tatyana Valeryevna Kukharova,

Alexander V. Martirosyan, Mir-Amal Mirrashidovich Asadulagi

et al.

Energies, Journal Year: 2024, Volume and Issue: 17(20), P. 5175 - 5175

Published: Oct. 17, 2024

Oil is one of the main resources used by all countries in world. The ever-growing demand for oil and products forces companies to increase production refining. In order net profit, producing are constantly upgrading equipment, improving technologies, preparing further processing. When considering elements primary refining difficult conditions, such as hard-to-reach or remote locations, developers face strict limitations energy dimensions. Therefore, use traditional systems causes a number difficulties, significantly reducing efficiency. this study, authors solve problem characteristics separation process. their work, analyzed columns distillation, identified shortcomings technological process, searched solutions. Having lack technical solutions monitoring state temperature field column, developed own hardware–software complex column (RF patents No. 2020665473, 2021662752 were received). was tested successfully implemented into production. study provides an assessment economic efficiency implementation year forecast effect 10 years.

Language: Английский

Citations

3

Potential Application of Saponite Clay for Production of Drilling Fluids DOI Open Access
Olga Zubkova,

Vyacheslav Kuchin,

Maria Toropchina

et al.

International journal of engineering. Transactions B: Applications, Journal Year: 2024, Volume and Issue: 37(11), P. 2142 - 2149

Published: Jan. 1, 2024

Saponite is classified as a trioctahedral mineral of the smectite group.Natural saponite Lomonosov deposit (Arkhangelsk region, Russia) represented Na- or Ca- forms according to XRD analysis. The interlayer space structure contains water molecules. clay sampled at by pulp. powder for research was obtained technology concentrating fine material. crystallochemical formula calculated based on data from XRD, XRF and atomic emission analyses. purpose study effect mixed sodium carbonate-sulfate electrolyte (Na2SO4 - 80%; Na2CO3-20%), polyacrylamide (PAA) low viscosity polyanionic cellulose (PAC L) structure, filtration rheological properties suspension. optimum solids content in suspension determined be range 85-100 g/l. Going out leads deterioration presented significant increase loss increased thickness cake. Filtration 85 g/l 22 cm3/30 min. Addition improved properties, but 34-36 admixture rather quickly flocculation sedimentation particles; 16-21 presence creates gel increasing mud system significantly reducing 7-9

Language: Английский

Citations

2

Experimental Study on the Effect of Unloading Paths on Coal Damage and Permeability Evolution DOI Open Access
Congmeng Hao, Youpai Wang, Guangyi Liu

et al.

Processes, Journal Year: 2024, Volume and Issue: 12(8), P. 1661 - 1661

Published: Aug. 7, 2024

Coal seam cavitation is one of the most effective techniques for gas disaster control in low-permeability coal. Due to difference method and process, damage degree fracture development range coal body around cavern are greatly different, effect increasing permeability further changed. In order understand enhancement mechanism technology on effectively guide engineering applications, this paper conducted experimental research unloading evolution characteristics under different paths using a coal-rock “adsorption-percolation-mechanics” coupling test system. Through analysis strength deformation characteristics, law combined with macroscopic coal, degradation unloaded increased flow were revealed. The results show that can significantly reduce greater rate, more obvious reduction. essence reduces cohesion internal friction angle coal—damage breakage ways improve body. Unloading damaged bodies not only improves but also diffusion ability gas, finally, shows remarkable strengthening extraction.

Language: Английский

Citations

2

Characteristics, Controlling Factors and Reservoir Quality Implications of Inner Fracture Zones in Buried Hills of Archean Covered Metamorphic Rock in Block 13-2, Bozhong Depression DOI Creative Commons
Junjie Lu, Xuanlong Shan,

Jian Yi

et al.

Energies, Journal Year: 2024, Volume and Issue: 17(6), P. 1345 - 1345

Published: March 11, 2024

Inner fracture zones play a decisive role in the formation of high-quality reservoirs buried hill covered metamorphic rock. Based on core, sidewall thin section, seismic, logging and reservoir physical property data, development characteristics Bozhong 13-2 block are described detail controlling factors influence quality discussed. The results showed: (1) three groups tectonic fractures developed study area—near-EW-striking, ENE-striking nearly N–S-striking fractures—were controlled by early Indosinian thrusting, late to Yanshanian sinistral strike-slipping dextral Bohai Bay Basin, respectively. ENE- nearly-E-W-striking most common, dip angles mostly between 35° 75° thus oblique. (2) Indosinian-early was main fracture-forming period, strike-slip action key maintaining effective fractures. Imaging shows that 97.87% section observation, 14.47% unmodified open 80.37% due reactivation. (3) fault transformed deformation adjustment zone formed thrust faulting core fold structure more conducive development. density single well located within at is 0.93–1.49 m−1, only 0.67–0.75 m−1 wing 0.35–0.59 m−1. Diabase dike intrusions promoted local (4) Fractures promote migration accumulation oil gas, layer 0.81–2.19 That nonoil 0.25–1.12 In addition, not provide storage space but also effectively improve capacity inner concentrating dissolution.

Language: Английский

Citations

1

Synthesis and Performance Evaluation of High-Temperature-Resistant Extreme-Pressure Lubricants for a Water-Based Drilling Fluid Gel System DOI Creative Commons
Shengming Huang,

Tengfei Dong,

Jiang Guancheng

et al.

Gels, Journal Year: 2024, Volume and Issue: 10(8), P. 505 - 505

Published: Aug. 1, 2024

Addressing the high friction and torque challenges encountered in drilling processes for high-displacement wells, horizontal directional we successfully synthesized OAG, a high-temperature high-salinity fluid lubricant, using materials such as oleic acid glycerol. OAG was characterized through Fourier-transform infrared (FTIR) spectroscopy thermogravimetric analysis (TGA). The research findings demonstrate excellent lubricating performance of under conditions. After adding 1.0% to 4% freshwater-based slurry, adhesion coefficient mud cake decreased 0.0437, at dosage 1.5%, lubrication 0.032, resulting reduction rate 94.1% coefficient. heating 200 °C 16 h, reached 93.6%. Even 35% NaCl conditions, remained 80.3%, indicating retention performance. lubricant exhibits good compatibility with high-density gel systems, maintaining their rheological properties after reducing filtration loss. mechanism indicates that can effectively adsorb onto surface N80 steel sheets. contact angle sheets increased from 41.9° 83.3° before hot rolling, significant enhancement hydrophobicity. This is primarily attributed formation an extreme-pressure film chemical reactions on metal surface. Consequently, this markedly reduces between tools wellbore rocks, thereby enhancing providing valuable guidance constructing water-based systems.

Language: Английский

Citations

1

Research for Flow Behavior of Heavy Oil by N2 Foam-Assisted Steam (NFAS) Flooding: Microscopic Displacement Experiment Study DOI Open Access
Qiang Fu, Zhihao Yang, Yongfei Liu

et al.

Processes, Journal Year: 2024, Volume and Issue: 12(8), P. 1775 - 1775

Published: Aug. 22, 2024

Steam flooding is easily induced to transverse flow, with a limited swept area and low displacement efficiency. Therefore, chemical agents have been used assist in steam for heavy oil extraction. However, research into the driving mechanisms modes of occurrence residual insufficient. In this work, simulation was conducted understand mechanism during process reservoirs. First, foam properties novel DES (Deep Eutectic Solvent) CTAB (Cetyltrimethyl Ammonium Bromide) composite system ultra-low interfacial tension were tested. The optimal concentration gas–liquid ratio agent solution determined. Secondly, NFAS (N2 foam-assisted flooding) carried out after flooding, flow behavior crude at different pathway zones researched. end, remaining morphology distribution characteristics under times analyzed, determining mode flooding. results show that (1) has good properties. best 0.5 wt%, gas liquid 1:1. (2) stage, columnar narrow hole near increases, cluster far channel changes film columnar. (3) During displacement, primarily presents state fully mixing O/W emulsion formed blending dispersing oil, gas, water. (4) After distributed each throat. passage mostly blocked by large holes pore coordination number 4 5. distant runner thick middle throats. (5) outperforms significantly decreasing passages main channels, resulting substantial 44.9% increase overall recovery rate.

Language: Английский

Citations

1

Three-Dimensional Coupled Temporal Geomechanical Model for Fault-Reactivation and Surface-Deformation Evaluation during Reservoir Depletion and CO2 Sequestration, Securing Long-Term Reservoir Sustainability DOI Open Access
Sirous Hosseinzadeh, Reza Abdollahi, Saeed Salimzadeh

et al.

Sustainability, Journal Year: 2024, Volume and Issue: 16(19), P. 8482 - 8482

Published: Sept. 29, 2024

Assessing reservoir subsidence due to depletion involves understanding the geological and geophysical processes that lead ground as a result of fluid extraction. Subsidence is gradual sinking or settling Earth’s surface, it can occur when hydrocarbons are extracted from underground reservoirs. In this study, time-integrated 3D coupled geomechanical modeling incorporating fourth dimension—time—into traditional models has been constructed utilizing seismic inversion volumes one-dimensional mechanical Earth model (1D MEM). The was calibrated 1D MEM results. Geomechanical rock properties were derived density sonic log data distributed with conditioning obtained running pre-stack inversion. standard elastic parameter equations used generate estimates moduli. These dynamic but have converted static values using additional in study. This included estimating Unconfined Compressive Strength. situ stresses matched different minimum horizontal principal stress gradients ratios. match good except where weak carbonate faults close wells, Shmin magnitudes tend decrease. SHmax orientations assessed image indicated be 110° section. A simulation created finite-element method (FEM). effective increase while there all directions, especially Z direction. predicted compaction overburden 350 mm. Most occurs at level dissipates towards surface (seabed). Furthermore, case displayed no shear failure might cause fault reactivation interval (Kangan–Dalan Formations) located simulated area. we applied an integrated comprehensive approach evaluate subsidence, alteration, inversion, well logs, experiment data. deformation monitoring reservoirs, whether for gas storage hazardous disposal, essential economic value stored assets nature disposed materials. vital ensuring sustainability by maintaining operational success detecting integrity issues.

Language: Английский

Citations

1