Multiple Application of Image Log Data to EOR Operations in the Cooper Basin, Australia Scott Douglas Mildren; Scott Douglas Mildren JRS Petroluem Research Search for other works by this author on: This Site Google Scholar Jamie Burgess; Jamie Burgess Santos Ltd. Search for other works by this author on: This Site Google Scholar Jeremy Joel Meyer Jeremy Joel Meyer JRS Petroluem Research Search for other works by this author on: This Site Google Scholar Paper presented at the SPE International Improved Oil Recovery Conference in Asia Pacific, Kuala Lumpur, Malaysia, December 2005. Paper Number: SPE-97792-MS https://doi.org/10.2118/97792-MS Published: December 05 2005 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Mildren, Scott Douglas, Burgess, Jamie, and Jeremy Joel Meyer. "Multiple Application of Image Log Data to EOR Operations in the Cooper Basin, Australia." Paper presented at the SPE International Improved Oil Recovery Conference in Asia Pacific, Kuala Lumpur, Malaysia, December 2005. doi: https://doi.org/10.2118/97792-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE International Improved Oil Recovery Conference in Asia Pacific Search Advanced Search AbstractReservoir geometry, natural fracture networks and in situ stress directly impact on the planning and implementation of flooding operations. Image logs were acquired from two wells in Field A, the Cooper Basin, with three main objectives in mind: increase confidence on the distribution of oil reservoir sand prior to in-fill drilling; quantify natural fracture populations and assess their possible contribution to production from a tight reservoir, and; quantify the contemporary stress regime and consider its bearing on idealised flow direction.Tectonic tilt and palaeocurrent indicators were identified in conjunction with natural fractures and in situ stress features from both wells. Palaeocurrent flow directions confirmed a dominant transport direction to the south. However, sediment transport within the Tirrawarra Sandstone reservoir is clearly to the northeast parallel to the strike of the Field A structure. This implies enhanced permeability parallel to this direction due to grain stacking.Natural fracture density is more enhanced at the crest of the structure than the flanks and the dominant 065°N natural fracture trend is predicted to have greater hydraulic conductivity with respect to the in situ stress field.The in situ stress field was determined to be strike-slip with sHmax oriented approximately 117°N defining a third permeability enhacement associated with Field A. Without further knowledge of the relative magnitudes of each of these permeability enhancements, it is recognized that EOR patterns planned in an east-west orientation will maximize flooding and sweep efficiency within the Tirrawarra Sandstone oil reservoir.IntroductionField A is a NE-SW oriented body comprised of a low permeability (0.1 - 1.0 mD) tight sandstone reservoirs with 7–11% porosity (Fig. 1). The Tirrawarra Sandstone reservoir has been produced by depletion drive and initial pressures of approximately 4200 psig has been drawn-down to 3150 psig in the NE and 2700–2800 psig in the SW. With production since 1983, EOR procedures are being considered to improve the current 3–4% recovery of the original oil-in-place.EOR procedures are dependent on several factors such as: habitat of the residual oil, fluid properties, reservoir conditions, reservoir geometry, reservoir heterogeneity and the impact of the in situ stress regime. These factors are diverse in nature and each necessitates separate methodologies and techniques for their evaluation. However, resistivity image log data can be used as a fundamental framework for assessing several of these influencing parameters. This paper documents the use of resistivity images logs acquired from two wells within the Field A to make critical observations with respect to three of these factors and contribute to the overall design of the planned EOR operations.Reservoir Geometry.Reservoir geometry is key to successful infill drilling across a field where there still remains significant uncertainty regarding the distribution of the reservoir sands.Field A is located proximally to the main Cooper Basin depocentres and significant variations are observed in Tirrawarra Sandstone net reservoir thickness across the field (up to 87% variation from the field average). The Tirrawarra Sandstone is a fine to coarse grained sublitharenite deposited within a fluviatile braided-stream environment with local conglomerate channels deposited in a waning-glacial environment. Locating likely depositional fairways is therefore a key priority. Uncertainty on depth/closure, pool contacts and variations in reservoir thickness have greatest bearing on in place at Field A and thus recovery estimates.The uncertainty surrounding the geometry of the Field A reservoir can be reduced with the aid of resistivity image log data. Identification of sedimentological structures and bedding surfaces within these logs can be used to define tectonic tilt which in turn can be used to back-rotate palaeocurrent indicators to define transport directions and depositional fairways. Keywords: natural fracture, upstream oil & gas, tectonic tilt, log analysis, star resistivity image log, stress magnitude, breakout, image log, sandstone, reservoir characterization Subjects: Reservoir Characterization, Formation Evaluation & Management, Exploration, development, structural geology, Faults and fracture characterization, Reservoir geomechanics, Open hole/cased hole log analysis This content is only available via PDF. 2005. Society of Petroleum Engineers You can access this article if you purchase or spend a download.
Sport specialization has been defined as year-round intensive training in a single sport to the exclusion of other sports. A commonly used survey tool created by Jayanthi et al, which classifies athletes as having a low, moderate, or high level of specialization, categorizes only athletes answering yes to "Have you quit other sports to focus on a main sport?" as highly specialized. We hypothesized that a measureable number of year-round, single-sport athletes have never played other sports and, therefore, may be inaccurately classified as moderately specialized when using this tool, even though most experts would agree they should be viewed as highly specialized.To determine the proportion of athletes misclassified as moderately rather than highly specialized because they never played a previous sport.Cross-sectional study.Hospital-based pediatric outpatient sports medicine clinic.Injured athletes aged 12 to 17 years who presented to the clinic between 2015 and 2017 and completed a sports-participation survey (n = 917).Sport-specialization level.Of 917 participants, 299 (32.6%) played a single sport more than 8 months per year, and 208/299 (69.6%) had previously quit other sports (highly specialized), whereas 91 (30.4%) had never played other sports (highly specialized and misclassified as moderate). Individual-sport athletes had a 2.03 times greater risk of being highly specialized and misclassified as moderate than team-sport athletes (relative risk = 2.03 [95% confidence interval = 1.37, 3.00]). Females had a 1.70 times greater risk of being misclassified as moderately specialized than males (relative risk 1.70 [95% confidence interval = 1.07, 2.70]). Of the 3 sports with the largest number of athletes, artistic gymnastics had the highest proportion (51.2%) who had never played other sports.The commonly used specialization survey misclassified a substantial number of highly specialized athletes as moderately specialized. Researchers should consider adding a fourth survey question, "Have you only ever played 1 sport?" to identify and better study this unique subset of misclassified athletes.
Purpose: The American Academy of Pediatrics (AAP) recommends physical examination screening for developmental dysplasia of the hip (DDH) for all newborns at birth and again periodically at well baby visits every 2 months for the first 6 months of life. Despite these recommendations, dislocated hips still go undiagnosed past 6 months of age at which time treatment becomes more complex and challenging with additional operative procedures. Risk factors for late presentation, such as female sex, vertex birth, and normal delivery …
Objective: Few studies have tracked neurologic function in youth football players longitudinally. This study aimed to determine whether changes in tests of auditory, vestibular, and/or visual functions are evident after participation in one or two seasons of youth tackle football.Study Design: Prospective cohort study.Subjects and Methods: Before their 2017 and/or 2018 seasons, male tackle football players (ages 7–14 yrs) completed three tests that tend to exhibit acute disruptions following a concussion: (1) the FFR (frequency-following response), aphysiologic test of auditory function, (2) the BESS (Balance Error Scoring System), a test of vestibular function, and (3) the King-Devick, a test of oculomotor function. We planned to repeat these on all subjects at the end of each season.Results: Performance on neurosensory tests was stable, with no changes observed in FFR or King-Devick and a slight improvement observed in BESS performance across each season. Performance was also stable over two years for the subjects who participated both years. Across-season test-retest reliability correlations were high.Conclusions: In the absence of concussion, young athletes' performance on the FFR, King-Devick, and BESS is stable across one or two seasons of youth tackle football.
Purpose: Previous studies have shown early sports specialization (year-round training in a single sport) may increase injury risk for young athletes. However, these studies combined males and females in several sports and were not population-based. The purpose of this study is to evaluate the relationship between sports specialization and injury in a large national sample of male youth soccer players. Methods: In August 2016, we surveyed parents of approximately 10,000 male youth soccer players (aged 7-18) in the U.S. Soccer Development Academy. Participants were …
Simulation-based education has been integrated into many orthopaedic residency programs to augment traditional teaching models. Here we describe the development and implementation of a combined didactic and simulation-based course for teaching medical students and interns how to properly perform a closed reduction and percutaneous pinning of a pediatric supracondylar humeral fracture.Subjects included in the study were either orthopaedic surgery interns or subinterns at our institution. Subjects all completed a combined didactic and simulation-based course on pediatric supracondylar humeral fractures. The first part of this course was an electronic (e)-learning module that the subjects could complete at home in approximately 40 minutes. The second part of the course was a 20-minute simulation-based skills learning session completed in the simulation center. Subject knowledge of closed reduction and percutaneous pinning of supracondylar humeral fractures was tested using a 30-question, multiple-choice, written test. Surgical skills were tested in the operating room or in a simulated operating room. Subject pre-intervention and post-intervention scores were compared to determine if and how much they had improved.A total of 21 subjects were tested. These subjects significantly improved their scores on both the written, multiple-choice test and skills test after completing the combined didactic and simulation module. Prior to the module, intern and subintern multiple-choice test scores were significantly worse than postgraduate year (PGY)-2 to PGY-5 resident scores (p < 0.01); after completion of the module, there was no significant difference in the multiple-choice test scores. After completing the module, there was no significant difference in skills test scores between interns and PGY-2 to PGY-5 residents. Both tests were validated using the scores obtained from PGY-2 to PGY-5 residents.Our combined didactic and simulation course significantly improved intern and subintern understanding of supracondylar humeral fractures and their ability to perform a closed reduction and percutaneous pinning of these fractures.
Purpose: Medial epicondyle fractures (MEF) are a common pediatric injury, with little evidence to guide decision-making with respect to treatment. Both casting alone and operative treatment with reduction and fixation have been shown to give reliably good results with low complication rates. High-level comparative studies to establish superiority of one treatment are lacking. We hypothesize that this will lead to large variability in operative treatment rates between hospitals as decisions are based on surgeon and patient preference. The purpose of this study is to describe MEF treatment variation and to evaluate which …
