Day 2 Tue, March 14, 2023最新文献

{"title":"Accelerating the Host Country National (HCN) Technical Competencies Towards Sustainable and Safe Operation (Control # 23GOTS-P-434-SPE)","authors":"Yushafidi Bin Yusof, Mohamad Hafiz Bin Mohamad Nor, Ruslizan Bin Hussain","doi":"10.2118/214173-ms","DOIUrl":"https://doi.org/10.2118/214173-ms","url":null,"abstract":"\u0000 The paper aims to describe the methodology and processes that PETRONAS Upstream International Operation has established via the Local Talent capability Development Acceleration Framework which accelerate talent competency and progression that provides assurance on the talents technical capabilities operating the facilities around the world. It is imperative that the Local Talents are given the right and ample opportunities to develop themselves as the oil and gas industry demands capable people to operate the business efficiently in an extremely risky & complex environment.\u0000 The framework was designed as a structured competency acceleration program with rigorous monitoring aims to produce a robust and competent local workforce that can operate the plant independently. The program is phased out for up to seven (7) years with each year having specific indicators identified and determined to be achieved based on the requirements of the respective position. Local candidates are assigned to a technical coach and are tracked and monitored religiously on a bi-weekly basis to ensure they are always on track to meet the target. There are two (2) stages being set with each stage having a different target.\u0000 Stage 1 focuses on equipping the talents with minimum critical skills to perform operation critical position task in the plant with minimal guidance and supervision from the expert. Stage 2 focuses on upskilling the candidates to the \"skill level\" which makes them ready to execute critical position task without requirement of direct supervision.\u0000 In developing the local talent, understanding the ground rules and regulations such as the limitation on employing staff within a certain province where the plant is operated lead to a limited pools of experienced and quality talents e.g. fresh graduates. It has been observed an improvement of 35% of talents meeting the target indicators within 2 years of program implementation. A few enhancements were made along the way based on the analysis to further improve the outcome.\u0000 This paper provides some insights on the best practices/lesson learnt that can be replicated by other O&G Operators across the world in accelerating the capabilities development towards sustainable talents pool from the local talent's resources.","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126156272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Personal Protective Equipment Detection Using Computer Vision Techniques","authors":"Rawabi Sultan Aldossary, Manar Nasser Almutairi, Serkan Dursun","doi":"10.2118/214093-ms","DOIUrl":"https://doi.org/10.2118/214093-ms","url":null,"abstract":"\u0000 The intensive use of chemicals, machines and electrical assets introduced unsafe conditions to the workplace. An unsafe condition is a physical condition that can cause an incident, such as operating without training, defective supplies and poor housekeeping. Such conditions might cause serious injury or even death. As well as the human impact, unsafe conditions have a significant impact on operational excellence and the financial state of a company. Companies are committed to ensure a safe environment by setting safety polices, conducting safety training, fire prevention systems, safety manuals and signboards and providing safety gears. Personal protective equipment (PPE) is safety equipment that can maintain the safety of employees in hazardous conditions, such as hot surfaces and toxic chemicals that can cause serious injuries and illness. PPE is sometimes referred to as the last line of defense. Some workers might not comply with safety policies or refuse to wear the PPE. To overcome the manual safety checks and compliance of employees, in this paper we propose an AI-powered computer vision automation solution leveraging the state of the object detection model. Computer vision is the field that mimics human vision to extract purposeful information from videos and images. Computer vision brings about various functionalities to perform tasks such as object detection, object classification, object identification and object verification. The proposed solution is developed by using a computer vision technique that detects various types of PPEs in real time. The main purpose of this project is to detect a presence of eight classes (person, helmet color: Red, Yellow, Blue and White, head, vest, glasses). The best results are achieved by applying YOLOv5 on a set of construction site images with corresponding annotations in YOLO format. The proposed solution automates the process of detection and monitoring PPE and employee behavior in operation fields in real-time. Automating the detection can reflect the business value by reducing the timeframe for tracking, creating a safe environment that in turn can increase the productivity and safety of the workers and reduce the costs of operations. The proposed solution includes all the components of data ingestion, data processing, object detection model and deployment on the edge device or server to improve safety.","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115516606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Late Time Response Analysis in Pressure Build Up Tests: Challenges and Solutions","authors":"E. Motaei, A. Ali, M. I. B. Rozali","doi":"10.2118/214111-ms","DOIUrl":"https://doi.org/10.2118/214111-ms","url":null,"abstract":"\u0000 One of the most important features that impacts the facility size and production rate commitment is the minimum connected volume which can be explored through pressure Build Up and any misinterpretation, costs the operators significantly. This paper aims to address the challenges in Late Time Response analysis of pressure Build up well tests that exploits the reservoir boundary. Knowing that the well test response at late time shows the fingerprint of multiple features such as aquifer, sand discontinuity, baffles, faults, boundaries, etc., it will be challenging to quantify the extends of the reservoir using convolved late response.\u0000 Two main numerical models were built for oil and gas reservoirs in an elongated reservoir to study the lateral boundary features such as closed boundary and aquifer and understand the effect of these features on late time response to get a clearer response. Using two models, the impact of mobility contrast between the hydrocarbon, boundary distance, aquifer strength, boundary movement and structure complexity was simulated.\u0000 The major finding of this paper is that a unit slope straight line can be seen in buildup test which doesn't fit any classical and analytical model for pressure build up as the expectation is to have negative slope and down-ward hump for build up response of closed boundary and aquifer. However, this can be explained through mobility reduction from hydrocarbon (oil/gas) to water. The simulation time (build up test duration) was extended to see the long-term impact theoretically and at the end the same expectation was confirmed by simulation. After radial flow, channel flow (half slope) and then unit slope (mobility reduction) and then at last the drop in the derivative response is observed. However, the drop as signature of aquifer or limited volume happened beyond practical test duration (> 1000 hours).\u0000 The work highlights the true workflow to identify the true response from reservoir and have reliable reservoir characterization and shows the case studies that address the cost on 1) misinterpretation of late time response and 2) excluding the well test from analysis due to its complexity to highlight the value and criticality of the integrated analysis.","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130101504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Application of NMR Log in Rock Type Definition for Mishrif Formation of Iraq Oil Filed","authors":"Wei Wei, Shixin Wang, Cuihong Chen","doi":"10.2118/214119-ms","DOIUrl":"https://doi.org/10.2118/214119-ms","url":null,"abstract":"\u0000 The Block 9 field located in South Iraq has multiple reservoir units including the late Cretaceous Mishrif carbonates. Regionally, Mishrif consists of shallow-marine carbonates, known as the most important oil-bearing reservoir in southern Iraq and the whole Mesopotamian basin. One of the key subsurface challenges in carbonate reservoirs is how to understand and characterize reservoir complexity and heterogeneity and define the rock type for the static model. The complexity and heterogeneity of the reservoir have been reflected based on the core data and production data. This paper aims at finding a better method to accurately quantify the petrophysical rock types (PRT) for single wells and then depict the reservoir property variation laterally.\u0000 Based on the integrated study of rock typing, in a core domain, six rock types have been defined. Based on the CT scan, thin section analysis, and image log, it's observed that rock type 1 has more vugs and moldic pores than rock type 2 and rock type 3. The vugs and moldic pores in the form of large pores, if present, dominate the petrophysical properties, especially permeability. Advanced logs, e.g. nuclear magnetic resonance (NMR) logs, when available, were the primary tools to identify the large pores.\u0000 In the study of rock typing, one of the challenges is to define the PRT from cored wells to uncored wells using the method of cluster analysis based on conventional log data. Because of the ambiguous character of conventional log data between different rock types, there are high uncertainties to define the petrophysical rock type. The main reason is that the conventional log cannot depict the variations in the pore structure. However, advanced logs, e.g., NMR logs and image logs can be used to characterize the variations in pore structure, both qualitatively and quantitatively.\u0000 This paper presents a feasible method to quantify the large pores including moldic pores and vugs and define the PRT by integrating core data and NMR log data and extending the rock types to the other wells with available NMR log data. Firstly, by correlating between mercury injection capillary pressure (MICP) data and NMR data of different rock types, a cutoff of 256ms~300ms of T2 relaxation time was estimated to distinguish rock type1 and rock type 2 & rock type 3, and a variable named vug was defined to quantify the large pores. Then a cross plot was created to build the relationship between the variable vug and routine core analysis (RCA) data. Then two cutoffs were identified to separate rock types 1, 2, and 3. Finally, when the cutoff was determined, these cutoffs can be used to accurately define the PRT for uncored wells with available NMR log data.\u0000 Well test, production logging, and sonic noise logging have been carried out in this field. Based on the production logging and sonic noise logging data, the identified production contribution for each subunit is consistent with the rock typing defined by the NMR log. Rock","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121391090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical Simulation of CO2 Mineral Trapping Potential of Carbonate Rocks","authors":"Johny Mouallem, M. Arif, M. Mahmoud","doi":"10.2118/214162-ms","DOIUrl":"https://doi.org/10.2118/214162-ms","url":null,"abstract":"\u0000 During CO2 geo-storage, mineral dissolution is considered as the safest trapping technique however it is the longest and the most complicated trapping mechanism involving geo-chemical reactions and physical forces like diffusion and advection. Many factors also influence the mineral trapping capacity of the geological formation e.g., mineralogy, temperature, pH, CO2 fugacity, pressure of CO2, salinity and impurities.\u0000 The scope of this study is to investigate the mineral trapping of CO2 in Arabian carbonates reservoirs as a function of CO2 pressure injection, presence of contaminants and well configuration. Numerical simulations were performed using the multi-phase simulator GEM-CMG. 2D and 3D models were developed to examine the mechanisms occurring during mineral trapping and how these affect its efficiency. The mineralogy of a carbonate field from an Arabian formation was used. Sensitivity analysis was performed on the above variables on CO2 mineralization tendency.\u0000 The results suggest that dissolution and precipitation of minerals occurred during and post CO2 injection. Increasing pressure led to higher amount of CO2 trapped while the presence of impurities in the injected fluid reduced the potential of CO2 mineralization. Moreover, using horizontal well tends to promote the mineral activity during CO2 storage.\u0000 While a score of publications investigated CO2 storage via structural, residual and dissolution trapping mechanisms, still the mineral trapping potential and its influencing factors have not been investigated much. This paper thus provides insights into CO2 sequestration by mineral trapping pertinent to Arabian carbonate rocks.","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117302950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A New Research on the Mechanism of Stick-Slip Vibration and the Design of an Auto-Response DOC Controller","authors":"Zhenguo He, Libao Shi, Hongfang Nie, Lingxi Li, Canguang Li","doi":"10.2118/214270-ms","DOIUrl":"https://doi.org/10.2118/214270-ms","url":null,"abstract":"\u0000 Stick-slip vibration has been a major problem in drilling operations in B basin, Chad, where rocks in basement formation are hard granite. Premature failure of drill bits and string has profoundly undermined the safe and economical drilling operations. Hence, it is urgent to reveal the mechanism of stick-slip vibration and find a way to eliminate or relieve stick-slip problem. Through the numerical and experimental study on the effects of the cutting parameters on cutting performance, root cause on depth of cut (DOC) or cutting depth is revealed as the mechanism of stick-slip vibration, optimized cutting depths for different rock layers are recommended as well. With it, a novel design of auto-response DOC controller is proposed and those structural parameters are modified and via numerical simulation research. After machining and testing, the structure of the auto-response DOC controller is preliminary determined and it has acquired the satisfactory motion performance and met the testing standards as it can slowly retract into the body by resisting the load and quickly extend outward the body. The auto-response DOC controller and the anti-stick-slip PDC bit have profound application potential in developing the ultra-deep and unconventional reservoirs, especially in this era shocked by low oil price and the pandemic.","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115045178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A New Tool for Identification of Lost Circulation and Fluid Influx: Experimental Study","authors":"Yue Ma, V. Dokhani, Hejun Ma, Hailong Miao, Zhaorui Shi, Daoming Zhang","doi":"10.2118/214243-ms","DOIUrl":"https://doi.org/10.2118/214243-ms","url":null,"abstract":"\u0000 Mud loss occurrence is one of the costly problems during drilling operations that can increase the non-productive time if not treated promptly. This study presents a new method for analysis of drilling microchip data, which can help to locate the loss and influx zone(s).\u0000 An experimental flow loop facility with an inclined test section is developed to study the effect of lost circulation or fluid influx on the circulating temperature profile. The presence of loss/influx zone is simulated using an external clamp to control the peripheral leakage or injection through a joint in the test section. Drilling microchips are dropped in multiple runs to obtain the circulating temperature profiles in the flow conduits with and without lost circulation. Similar tests are conducted in presence of fluid influx. Meanwhile, the transit times of tracers in the pipe and annulus are measured. A tracer tracking algorithm is developed considering slippage between the tracers and fluid to follow the axial location of tracers while circulating in the flow loop.\u0000 The experimental observations indicate that the tracers are moving slower than the average fluid velocity and mainly travel on the lower side of the inclined annular space. The circulating temperature profiles with and without lost circulation are compared to identify the loss zone. The experimental results further show that the depth of influx can be easily recognized from the calculated temperature gradients. Measured results of drilling microchips in a field trial are analyzed to identify anomalies of temperature gradients near the bottom hole. It is realized that the amplitude of the annular temperature gradient can be evaluated to identify the abnormal changes.\u0000 Novel results of deployed drilling microchips along with the presented methodology can be used to investigate the lost circulation or fluid influx while drilling. In particular, the amplitude of temperature gradients from the measured data of drilling microchips can be used as a signature to locate the loss and influx zone(s).","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124454847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Mathematical Modelling of the Plunger Lift Considering Effects of Fluid Friction and Plunger Travel Velocity","authors":"S. Rajvanshi, Rajiv Nischal, Bulusu V. R. V Prasad, M. Yadav, Avinav Kumar, Devendra Pratap Gaur, Divyansh Sethi, Amanish Sharma","doi":"10.2118/214043-ms","DOIUrl":"https://doi.org/10.2118/214043-ms","url":null,"abstract":"\u0000 Plunger lift technique is a well-known, widely accepted and economical artificial lift alternative, especially in deliquification of gas wells and to increase the efficiency of intermittently flowing oil wells. This study includes impact of fluid friction losses and variable plunger travel velocity in mathematical modelling of plunger lift design.\u0000 The design of plunger lift system, in most models, is simulated by a fix value of fluid friction losses based on plunger velocity, which does not consider the variable effects of the friction factor calculation based on Colebrook equation or complex multiphase flow. To consider these effects, other equations must be solved simultaneously with the well-known Foss and Gaul equations. Solution of the plunger lift design equation becomes even more complicated if the fluid friction properties are not uniform.\u0000 Foss and Gaul suggested an approximation for gas and liquid friction are constant for a given tubing size and a plunger velocity of 1,000 ft/min. Plunger travel velocity is the important parameter in design. The velocity at which the plunger travels up the tubing also affects the plunger efficiency. Very low velocity of plunger increases gas slippage and subsequently lead to inefficient operation. Whereas, high plunger velocities tend to push the plunger through the liquids. A steady state mathematical modelling and sensitivity analysis considering broad estimates, has been done using Python language. This approach can simulate any combination of associated parameters for plunger lift design in a relatively simple and effective manner.\u0000 The numerical results are compared to the actual available data. Analysis of the numerical results shows that the effects of fluid friction losses and plunger travel velocity are important for accurate modelling and design of the plunger lift system.","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116888349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modified Testing Protocol to Determine the Precise Thickening Time of Cement Slurry: A Field-centered Approach to Prevent the Premature Setting of Cement Slurry while Placement and Maximizing the Operational Efficiency","authors":"Wajid Ali, Faisal Abdullah Al-Turki, Fabian Lopez, M. Bouaraki","doi":"10.2118/214283-ms","DOIUrl":"https://doi.org/10.2118/214283-ms","url":null,"abstract":"\u0000 This paper addresses some challenges concerning cement slurry designs, focused on thickening time, requiring careful engineering practices, and proper cementing operational considerations. It presents a series of thickening time test studies compared to \"conventional testing practice\" versus \"field simulated testing\" to illustrate the differences between results.\u0000 Many aspects of oilfield cementing are sufficiently important to warrant study. One area that requires attention is the procedures used to design the cement slurry in the well. The batch-mix and static conditions influence the physical attributes of oilfield cement, including thickening time. Conventional laboratory testing invariably follows the API procedure for thickening time. Although this might be adequate in most cases, it may only precisely predict field behavior (at actual conditions) in some cases.\u0000 Conventional thickening time tests may not necessarily indicate the true responsiveness of cement slurry. Traditional thickening time waiting periods do not relate directly to how long a slurry can remain static and still be moveable after an inadvertent or intentional shutdown during placement. Mixing, pumping, and displacing the cement (including any shutdown) affect the hydration and thickening behavior. Therefore, it is imperative to understand the relative contributions from each part of the process toward the thickening time to help prevent failures. These contributions might not significantly impact slurry properties but should be quantified and understood. The reliable prediction of cement thickening time can be vital to the success of oilfield cementing operations. Because cement placement techniques have become complex, delivering slurry with accurate thickening time can be crucial to the job's success.\u0000 This paper presents a modified testing protocol to evaluate the effects of batch-mixing and static-period on cement slurry's thickening time to minimize the incidents related to the premature setting of cement slurry.","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128107314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Utilizing Core Fluorescence to Reduce Uncertainty in the Petrophysical Interpretation of Thin and Low Relief Carbonate Oil Reservoirs.","authors":"C. Sellar, A. Valente, David Rafael Contreras Perez, Humberto Parra, Nader Gerges","doi":"10.2118/214107-ms","DOIUrl":"https://doi.org/10.2118/214107-ms","url":null,"abstract":"\u0000 The water saturation (Sw) interpretation from resistivity logs has been observed to be highly uncertain in Oilfield A. By integrating core fluorescence observations from underutilized ultraviolet (UV) light core photography images, it is possible to QC these interpretations in challenging thin reservoirs, thinly bedded reservoirs, compacted reservoirs and low relief structures with significant oil volumes at intermediate oil saturation.\u0000 High-quality core is routinely taken in appraisal wells in Oilfield A. A standard core analysis work programme has been applied to these cores including core gamma, Conventional Core Analysis (CCA), Whole Core Analysis (WCA), Mercury Injection Capillary Pressure (MICP) and core photography. Core photography includes both white light and UV imaging. A detailed core description of the cores has subsequently been made. This includes the description of core fluorescence in UV core photography images which show varying intensities of hydrocarbon saturation. The core fluorescence description is integrated with all other available well data including the log Sw interpretation. The results highlight the uncertainty in the conventional resistivity-based determination of Sw.\u0000 As part of the modeling workflow in Oilfield A, log Sw interpretation and the proposed saturation height model (SHM) were QC’ed by integrating all available data from appraisal wells. By comparing hydrocarbon core fluorescence from UV light core photography images to the log Sw interpretation, the following results were possible:\u0000 High resistivity \"shoulder bed\" effects, resulting from the low-resolution resistivity log averaging the juxtaposition of low porosity non-reservoir and reservoir intervals, were removed from petrophysical interpretation. Core fluorescence from UV light core images was observed to be intermittent on a foot-to-decifoot scale in Reservoir 5 due to cementation associated with chemical compaction features. The high-resolution core fluorescence description was used to challenge the continuous hydrocarbon saturation interpreted from logs in Reservoir 5. The integration of these observations allowed reconciliation with results from repeat formation tester pump-outs and well tests, enabling a more realistic Sw distribution in the reservoir model. Hydrocarbon saturation from log Sw was interpreted to continue deep into several reservoirs in Oilfield A. The core fluorescence description from UV light core photography showed hydrocarbons were only present at the top of these reservoirs. In reservoirs with homogeneous porosity profiles but vertically changing rock-types, the resistivity log is not able to distinguish high resistivity caused by hydrocarbon saturation from high resistivity caused by cementation and/or reduced permeability. The finding challenges using the same values of ‘m’ and ‘n’ in Archie log Sw interpretation throughout a reservoir.\u0000 Integration of hydrocarbon core fluorescence from UV light core images added signif","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123005600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}