Enhanced Oil Recovery Surveillance and Operation Optimization through Digital Oilfield

2021 ◽  
Author(s):  
Fatemeh Mehran ◽  
Hayati Turiman ◽  
Nur Farhana Mohd Jamil ◽  
Khairul Mustaqim A Aziz
Keyword(s):  
Oil Recovery ◽  
Data Gathering ◽  
Production Engineering ◽  
Time Data ◽  
Online Data ◽  
Daily Monitoring ◽  
Well Model ◽  
Adverse Weather ◽  
Production Wells ◽  
And Performance

Abstract S Field field started enhancement planning and redevelopment recently by using an innovation EOR program called GASWAG, Gravity Assisted Simultaneous Water and Gas, in the selective oil-bearing sands. The initial program includes 6 infill producers, 2 water injectors, 3 gas injector wells and approximately 15 potential well reactivations to increase recovery by 7%. Since GASWAG is a new program in this region, it requires well and reservoir monitoring system to be implemented to have better understanding of complex behavior of water and gas injection and its effect on EOR performance. The main objective of the EOR Integrated Operation (IO) workflows solution, is to determine as quickly as possible if EOR performance is deviating from plan. This will be accomplished by earlier detection of EOR performance exceptions (compared to process without IO functionality), so that corrective action cycle time can be reduced, thereby reducing production deferment. Well Surveillance & Operational: a workflow to monitor, analyse and manage EOR wells production/ injection performance using real-time and in-time data together with updated well model. This Workflow focus on well and zones monitoring by using the well model and existing measurement. In addition, the existing IO workflows are integrated with EOR-Operational and feeding online data to this WF which is consistent with operational safety limit and KPOs. All operational data required for reservoir and production engineering were extracted either from well model, measurement or other workflows to the same well interface. Additionally, production and injection well surveillance and alarming system is implemented to benchmark the current operational condition deviated from plan or operational limit. Updated dynamic model and optimizer tool are used to define the optimum choke size of each reservoir layer for injecting or producing wells. This workflow was built and implemented successfully. It is designed based on very comprehensive technical aspects and KPIs from reservoir management, production engineering, facility constraint, well integrity to operational optimization. A single interactive visualization interface via web-based is implemented which cover all necessary production and reservoir data needed for collaborative decision making. The EOR well surveillance IO workflows will assist in automating computation of injection and production well health and performance. This solution benefits the asset team by allowing early detection of underperforming injection and production wells. Main challenges in S Field was, it is divided by several jackets thus require movement via vessel for manual data gathering. Unpredictable and adverse weather heavily challenge this activity. By having IO would help to improve data hygiene and collective data on daily monitoring. Additional functionality of the well surveillance workflow includes the monitoring of zonal rate and pressure, which are considered as main reservoir performance parameters. Operations, production, and reservoir engineers, as well as technical & business owners benefit from these workflows to steer the EOR operation.

scholarly journals Development Of Traditional Water Flooding To Increase Oil Recovery

2020 ◽  
Author(s):  
Sudad H Al-Obaidi ◽  
Khalaf FH
Keyword(s):  
Continuous Improvement ◽  
Oil Recovery ◽  
Technological Development ◽  
Geological Structure ◽  
Oil Fields ◽  
Water Flooding ◽  
Stage Of Development ◽  
Well Spacing ◽  
Production Wells ◽  
And Performance

The dynamics and performance of major oil deposits in late (final) stage of development of large oil fields are given the current rates of oil recovery. The high oil recoveries are resulted as a consequence of the favorable geological and physical characteristics of the development objects, application of development systems and optimal density well spacing, adequate geological structure, maintain during the process of the development the optimal rates of technological development, the modes of operation of wells and a project of the fund of production wells, continuous improvement of the project systems taking into account the dynamics of the reserves development and the clarification of the geological structure.

scholarly journals High Oil Recovery using Traditional Water-flooding under Compliance of the Planned Development Mode

2020 ◽  
Author(s):  
Sudad H Al-Obaidi
Keyword(s):  
Oil Recovery ◽  
Technological Development ◽  
Geological Structure ◽  
Oil Fields ◽  
Water Flooding ◽  
Development Mode ◽  
Stage Of Development ◽  
Well Spacing ◽  
Production Wells ◽  
And Performance

The dynamics and performance of major oil deposits in late (final) stage of development of large oil fields are given the current rates of oil recovery. The high oil recoveries are resulted as a consequence of the favorable geological and physical characteristics of the development objects, application of development systems and optimal density well spacing, adequate geological structure, maintain during the process of the development the optimal rates of technological development, the modes of operation of wells and a project of the fund of production wells, continuous improvement of the project systems taking into account the dynamics of the reserves development and the clarification of the geological structure.

scholarly journals Ship Handling in Unprotected Waters: A Review of New Technologies in Escort Tugs to Improve Safety

2021 ◽  
Vol 2 (1) ◽  
pp. 46-62
Author(s):  
Santiago Iglesias-Baniela ◽  
Juan Vinagre-Ríos ◽  
José M. Pérez-Canosa
Keyword(s):  
High Performance ◽  
New Technologies ◽  
Weather Conditions ◽  
Hull Form ◽  
Best Available Technologies ◽  
Adverse Weather Conditions ◽  
Adverse Weather ◽  
New Type ◽  
Technological Challenge ◽  
And Performance

It is a well-known fact that the 1989 Exxon Valdez disaster caused the escort towing of laden tankers in many coastal areas of the world to become compulsory. In order to implement a new type of escort towing, specially designed to be employed in very adverse weather conditions, considerable changes in the hull form of escort tugs had to be made to improve their stability and performance. Since traditional winch and ropes technologies were only effective in calm waters, tugs had to be fitted with new devices. These improvements allowed the remodeled tugs to counterbalance the strong forces generated by the maneuvers in open waters. The aim of this paper is to perform a comprehensive literature review of the new high-performance automatic dynamic winches. Furthermore, a thorough analysis of the best available technologies regarding towline, essential to properly exploit the new winches, will be carried out. Through this review, the way in which the escort towing industry has faced this technological challenge is shown.

Stabilization and Performance of a Novel Viscoelastic N2 Foam for Enhanced Oil Recovery

2021 ◽  
pp. 116609
Author(s):  
Haizhuang Jiang ◽  
Wanli Kang ◽  
Xinxin Li ◽  
Liang Peng ◽  
Hongbin Yang ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
And Performance

Design and performance of deep well dewatering: a case study

1998 ◽  
Vol 35 (1) ◽  
pp. 81-95 ◽  
Author(s):  
D W Sargent ◽  
R D Beckie ◽  
G Smith
Keyword(s):  
Soil Mechanics ◽  
Data Gathering ◽  
Monitoring Program ◽  
Treatment Plant ◽  
Pumping Test ◽  
Observational Method ◽  
Design Development ◽  
Deep Well ◽  
And Performance

This paper reviews the process used to design the construction dewatering system at the Influent Pumping Station at Annacis Island Wastewater Treatment Plant. The design process followed the "observational method," as applied to soil mechanics by K. Terzaghi and set out by R.B. Peck in the Ninth Rankine Lecture. The design was based on a working hypothesis of behaviour anticipated under the most probable conditions identified in the data gathering and assessment program. The sensitivity of the design was evaluated by considering potentially unfavourable conditions evident in the available data. The design development included a review of monitoring feedback obtained during the pumping-well installation, a pumping test, and the dewatering system start-up. The monitoring program and review process are presented.Key words: dewatering, observational method, case study, pumping test.

A Back Allocation Methodology to Estimate the Real-Time Flow and Assist Production Monitoring

2021 ◽  
Author(s):  
Gabriela Chaves ◽  
Danielle Monteiro ◽  
Virgilio José Martins Ferreira
Keyword(s):  
Real Time ◽  
Input Data ◽  
Oil Field ◽  
Well Testing ◽  
Well Test ◽  
Time Data ◽  
Time Flow ◽  
Well Model ◽  
Operational Information ◽  
The Individual

Abstract Commingle production nodes are standard practice in the industry to combine multiple segments into one. This practice is adopted at the subsurface or surface to reduce costs, elements (e.g. pipes), and space. However, it leads to one problem: determine the rates of the single elements. This problem is recurrently solved in the platform scenario using the back allocation approach, where the total platform flowrate is used to obtain the individual wells’ flowrates. The wells’ flowrates are crucial to monitor, manage and make operational decisions in order to optimize field production. This work combined outflow (well and flowline) simulation, reservoir inflow, algorithms, and an optimization problem to calculate the wells’ flowrates and give a status about the current well state. Wells stated as unsuited indicates either the input data, the well model, or the well is behaving not as expected. The well status is valuable operational information that can be interpreted, for instance, to indicate the need for a new well testing, or as reliability rate for simulations run. The well flowrates are calculated considering three scenarios the probable, minimum and maximum. Real-time data is used as input data and production well test is used to tune and update well model and parameters routinely. The methodology was applied using a representative offshore oil field with 14 producing wells for two-years production time. The back allocation methodology showed robustness in all cases, labeling the wells properly, calculating the flowrates, and honoring the platform flowrate.

Evaluation of Clinical Competence: The Gap Between Expectation and Performance

PEDIATRICS ◽  
1996 ◽  
Vol 97 (2) ◽  
pp. 179-184
Author(s):  
Bahman Joorabchi ◽  
Jeffrey M. Devries
Keyword(s):  
Descriptive Analysis ◽  
Data Gathering ◽  
Community Based ◽  
Resident Performance ◽  
Faculty Expectations ◽  
Clinical Evaluations ◽  
Pediatric Residency ◽  
Objective Structured Clinical Examinations ◽  
And Performance ◽  
High Degree

Objective. To evaluate a 3-year experience with the Objective Structured Clinical Examinations (OSCEs) and to compare faculty expectations with resident performance. Design. Descriptive analysis of measures of resident performance. Setting. Community-based pediatric residency program in Michigan. Participants. One hundred twenty-six pediatric residents at all levels of training. Methods. The three examinations consisted of 36 to 42 5-minute stations, testing skills in physical examination, history, counseling, telephone management, and test interpretation. A committee of faculty and chief residents predetermined minimum pass levels for each resident level. Results were compared with other indices of resident performance. Results. There was evidence for content, construct, and concurrent validity, as well as a high degree of reliability. However, 40% to 96% of residents scored below the minimum pass levels for their levels. In each examination, third-year residents had the highest failure rates, yet they scored well on the American Board of Pediatrics in-training examination and on their monthly clinical evaluations. Furthermore, for residents at all levels, the scores reflecting application of data were significantly lower than those assessing data gathering. Conclusions. The gaps between expectations and performance, and between data gathering and application, have important implications for institutional educational philosophy, suggesting a shift toward more clinically oriented and learner-directed strategies in the design of instructional and evaluation methods.

Reservoir and Wellbore Flow Coupling Model for Fishbone Multilateral Wells in Bottom Water Drive Reservoirs

2021 ◽  
pp. 1-27
Author(s):  
ping Yue ◽  
Jiantang Zhou ◽  
Li Xia Kang ◽  
Ping Liu ◽  
Jia Chunsheng ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Bottom Water ◽  
Water Reservoir ◽  
Pressure Profile ◽  
Coupling Model ◽  
New Model ◽  
Flow Coupling ◽  
Field Situation ◽  
Production Wells ◽  
Actual Field

Abstract Nowadays, different types of complex production wells are applied in challenging reservoirs in order to maximize oil recovery. A representative application is the fishbone multilateral horizontal wells, which have advantages of expanding the drainage area information and reducing the pressure loss in the long single lateral wellbore. This paper investigated the performance of fishbone wells and derived a wellbore and reservoir flow coupling model for fishbone multilateral wells in the bottom water reservoirs. The new model considered plenty of parameters that may have significant impacts on productivity and pressure drop in the well, including the fishbone structure, the main and branch wellbores' length, the spacing distance of the branch wellbores, wellbore radius, and preformation parameters. Furthermore, a sensitivity analysis example by the numerical method presented in this paper. Compared with other models, our coupling model, when it is degraded to horizontal well, is more consistent with the results of actual field situation. In another comparative analysis, the results of the new model with branches show a good match with the numerical simulation results by software. The proposed method in this paper can be used as a valuable tool to analyze the productivity, wellbore inflow profile, and pressure profile of the fishbone multilateral wells in the bottom water reservoir.

The Combined Flooding of Dispersed Particle Gel and Surfactant for Conformance Control and EOR: From Experiment to Pilot Test

2021 ◽  
Author(s):  
Xia Yin ◽  
Tianyi Zhao ◽  
Jie Yi
Keyword(s):  
Oil Recovery ◽  
Formation Energy ◽  
High Salinity ◽  
Surfactant Solution ◽  
Pilot Test ◽  
Control Performance ◽  
Core Flooding ◽  
Displacement Efficiency ◽  
Conformance Control ◽  
And Performance

Abstract The water channeling and excess water production led to the decreasing formation energy in the oilfield. Therefore, the combined flooding with dispersed particle gel (DPG) and surfactant was conducted for conformance control and enhanced oil recovery in a high temperature (100-110°C) high salinity (>2.1×105mg/L) channel reservoir of block X in Tahe oilfield. This paper reports the experimental results and pilot test for the combined flooding in a well group of Block X. In the experiment part, the interfacial tension, emulsifying capacity of the surfactant and the particle size during aging of DPG were measured, then, the conformance control and enhanced oil recovery performance of the combined flooding was evaluated by core flooding experiment. In the pilot test, the geological backgrounds and developing history of the block was introduced. Then, an integrated study of EOR and conformance control performance in the block X are analyzed by real-time monitoring and performance after treatment. In addition, the well selection criteria and flooding optimization were clarified. In this combined flooding, DPG is applied as in-depth conformance control agent to increase the sweep efficiency, and surfactant solution slug following is used for improve the displacement efficiency. The long term stability of DPG for 15 days ensures the efficiency of in-depth conformance control and its size can increase from its original 0.543μm to 35.5μm after aging for 7 days in the 2.17×105mg/L reservoir water and at 110°C. In the optimization, it is found that 0.35% NAC-1+ 0.25% NAC-2 surfactant solution with interfacial tension 3.2×10-2mN/m can form a relatively stable emulsion easily with the dehydrated crude oil. In the double core flooding, the conformance control performance is confirmed by the diversion of fluid after combined flooding and EOR increases by 21.3%. After exploitation of Block X for 14 years, the fast decreasing formation energy due to lack of large bottom water and water fingering resulted in a decreasing production rate and increasing watercut. After combined flooding in Y well group with 1 injector and 3 producers, the average dynamic liquid level, daily production, and tracing agent breakthrough time increased, while the watercut and infectivity index decreased. The distribution rate of injected fluid and real-time monitoring also assured the conformance control performance. The oil production of this well group was increased by over 3000 tons. Upon this throughout study of combined flooding from experiment to case study, adjusting the heterogeneity by DPG combined with increasing displacement efficiency of surfactant enhanced the oil recovery synergistically in this high salinity high temperature reservoir. The criteria for the selection and performance of combined flooding also provides practical experiences and principles for combined flooding.

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