TX 75083-3836, U.S.A., fax +1-972-952-9435. AbstractIn recent years, horizontal well technology has evolved as the more favorable option in the Middle East over the conventional vertical and deviated wells. The advantages are (a) maximum reservoir contact, (b) higher production rate and (c) better access to reserves.However, horizontal wells completed openhole have very limited scope for effective stimulation, water shutoff and workover treatment. Efficient stimulation of a long openhole section is a very challenging task due to poor and inconsistent acid distribution especially in reservoirs with high permeability streaks. This requires a very effective diversion technique. The efficiency of chemical diverting agents in terms of flow distribution and uniform coverage is limited in such complex wells with long openhole intervals.This paper illustrates case histories where an innovative technique was used to stimulate horizontal wells, where production had dropped to zero shortly after an openhole completion due to formation damage and incomplete cleanup. The technique combines mechanical isolation and chemical diversion for improved effectiveness of stimulation operations. It uses high performance mechanical openhole packers to segregate the openhole into small intervals based on petrophysical and reservoir evaluation, followed by individual stimulation of each segment with advanced Viscoelastic Diverting Acid as chemical diverters to ensure good zonal coverage across each segment. The result was uniform stimulation of each segment leading to even and maximized inflow from the entire section with one continuous operation.The first application in the Sabriyah field of the Northern Kuwait oil fields yielded natural production of 10,000 BOPD, which was five times the field average and three times greater than the best well in the field without requiring artificial lift. Significant productivity enhancement was also obtained in another horizontal well in the Minagish field in the West Kuwait region. The oil production was increased from 220 BOPD to 4,788 BOPD. Most recently the technique also successfully brought a dead horizontal well in the Burgan field in the Southern Kuwait area to produce naturally with a rate of 3,827 BOPD. These success stories lead to more applications of this new technology not only in other horizontal wells in Kuwait but also vertical wells in which multiple layers exist.

Greater Burgan in Kuwait is the second largest field and the largest clastic reservoir in the world. Discovered in 1938, the production initially came from Wara sandstone and soon followed by other underlying Burgan clastic reservoirs. Burgan reservoir mainly consists of three reservoir units namely Wara, Third, and Fourth sand. The Wara Water Flood Pilot Project is the first clastic waterflood pilot in Kuwait. Reservoir pressure in Wara has been falling below the bubble-point in many parts of the reservoir. This would ultimately result in free gas evolving from the oil and significant loss in reserve recovery. This pilot was designed with the objective to obtain information in the areas of:Long-Term InjectivityReservoir ConnectivityWater Breakthrough Time and DirectionWater-Cut DevelopmentProductivityOperational Experience The Wara pilot pattern is of inverted seven spot with one injector, six producers, and one water source and was designed to inject 5,000 to 10,000 bwpd into a single injector and to produce from six producers drilled around the injector. Each well is 250 meters apart and the producers are equipped with ESPs to produce even after water breakthrough. The project has been in the operational phase for the last two years and the main objectives of evaluating long-term injectivity and the reservoir response to water injection in the Wara reservoir were achieved. Results from this pilot were needed to reduce subsurface uncertainty and to support the design of future Wara waterflood projects. This will ultimately help in the decision of whether to build a permanent water flood project to maintain astable reservoir pressure in the Wara reservoir. This paper highlights the challenges and accomplishments in designing, completing, and operating of this successful water flood pilot project which could benefit other similar projects around the world. 1. INTRODUCTION The Greater Burgan field is located in the South-Eastern part of Kuwait as shown below and is producing most of the oil for the state of Kuwait. The Burgan reservoir mainly consists of three reservoir units namely Wara, Third, and Fourth sand. The Third and Fourth sand members have excellent reservoir characteristics and are prolific producers. At this time the Third sand is the major producer and contributing around 60–70% of the total present production of the Greater Burgan field.

Greater Burgan is the second largest oil field and the largest clastic reservoir in the world. There are over 1000 wells on production in this field. There is a robust plan to drill more wells in the coming years to cater for world demand in production. It is therefore necessary to track and report the production and field performance from this giant field in a timely and effective manner. This paper describes the approach taken towards the development of an integrated tracking and reporting metrics tool which displays operational data to key decision makers to monitor field performance and make practical decisions.The metrics report provides a comprehensive view of the performance of an asset using key performance indicators (KPIs) in the form of a dashboard. Information is captured from corporate databases, in house tools and data sources tracking daily operations. The report is displayed graphically for quick overview of categories such as daily production, subsurface and shutin well potential, facility capacity and constraints, well work, production tests, surveillance activities, wet and dry completions, production allowables, and other pertinent highlights through a single visual interface.Designed as a scorecard the tool provides a platform for increased collaboration and knowledge capture between assets. It reduces time spent looking for data thereby allowing more time for higher priority issues. The impact is directly on the reservoir management strategies, production management, prioritization of well work and surveillance activity.The metrics report is a best practice implemented by KOC Field Development South East Kuwait Asset Group to monitor the Greater Burgan oil field performance and optimize its production. Value added decision making is made easy wherein plans are properly implemented and targets are met. The designing, completing, and operating aspects of this successful reporting tool are highlighted together with the challenges and accomplishments.

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