clover news





				Jan 28, 2004 Downloadable PDF files for kirby's presentation at CIM luncheon talk In order to view the Bluewave Installation Guides PDF files you will need Acrobat Reader. Click here to download Acrobat Reader. View Color PDF Download Color PDF Download Black&white PDF Jan 26, 2004 CIM luncheon talk, Kirby's presentation on "Shallow Gas Well Spacing and Optimizing Low-Productivity Wells" Abstract: A hot topic these days is the best drilling density for shallow gas wells. Standard shallow gas spacing units are ¼-section (4 wells per section), but some companies are drilling up to 32 wells per section in an attempt to increase ultimate recoveries and accelerate economic return on the shallow reserves. Clover Resources, a reservoir and production engineering consulting firm, will present their perspective on recent shallow gas development styles and uncover the real issues in determining the best spacing for shallow gas developments. Shallow gas wells are typically low-rate producers of dry, sweet gas that exhibit steep production declines in the first year. With over 52,000 shallow gas wells in southern Alberta and Saskatchewan, these wells make a huge contribution to Canada’s total gas production. Despite the common perspective that shallow gas development is a “cookie cutter” operation, tremendous complexities exist that, when well understood, can assist in maximizing reserve recovery and production rates. For instance, commingling of production from multiple zones within a wellbore makes booster compression decisions significantly more complex. As well, liquid loading is a chronic problem for many shallow gas wells, and a review of current management strategies is highlighted. Clover will highlight their recent publication, “A Review & Recommended Approach to Shallow Gas Production Optimization in the WCSB.” The focus of this report is a map study of the SE Alberta and SW Saskatchewan shallow gas developments, including a review of over 52,000 shallow gas wells. This luncheon presentation will review specific industry examples of high drilling density versus standard density to highlight factors involved in spacing decisions, and to compare the benefits in productivity and gas recovery. The discussion will present the required elements of an infill-drilling study for those considering increased well density in shallow gas. https://secure.petsoc.org/LunchReg.html Jan 23, 2004 Gas Well Drilling Statistics and Forecast The statistics for 2003 show a total of 13,944 gas wells drilled in Western Canada, out of 19,851 total wells drilled. These numbers represent the highest drilling activity levels in Canadian history, and the Canadian Association of Oilwell Drilling Contractors (CAODC) forecasts only a mild decrease in activity for this year, making 2004 a very busy year for drilling activity. Clover supports step-out and infill drilling decisions to extend the shallow gas pool boundaries and improve reserve recovery. We believe there is immense potential for continued production from shallow gas reserves. Drilling is one tool to extract this potential. Clover offers a host of other engineering services to help maximize recovery of your shallow gas properties. CAODC Historical wells Drilled CAODC Drilling Activity Forecast Clover Resources is a strong supporter of production optimization and reservoir engineering principles. We apply technically sound and proven techniques to analyzing and improving as production. A holistic approach to shallow gas development includes understanding: reservoir dynamics completion effectiveness wellbore effects liquid management gathering system compression well density Jan 22, 2004 AEUB Planning Shallow Gas Pool Code Simplification The Alberta Energy and Utilities Board (EUB) is advancing on a draft General Bulletin (GB) to prompt industry feedback on a proposal to simplify the Southeast Alberta (SEA) shallow gas pool coding system. This GB is anticipated in the spring of 2004. Due to extensive commingling in SEA shallow gas wells, the number of pool codes has escalated to a large number, and is compounding to unmanageable levels with the a large number of individual Belly River pools, and the commingling of non-shallow zones in certain cases. Clover Resources has expressed our concerns about reducing the number of shallow gas pool codes because of the potential loss of data associated with this move. Zone-specific production data is already masked in production reports due to commingling and the extensive use of group metering in shallow gas. Considering that the Milk River Formation and Medicine Hat Formation are two of the largest gas pools in the WCSB, preserving production data is crucial. Wayne Elsner of the Resource Appraisal Group at the EUB has indicated that the proposed system will simplify administration while maintaining our current ability to track shallow gas pool production data. Each of the main shallow gas horizons will maintain their representation within the new coding system, enabling the same level of historical production analysis that is currently done. Clover Resources uses a history-matching radial flow model for multi-zone wells that has successfully modeled commingled shallow gas wells in the current reporting system. We expect the pool code simplification process will enable us to continue to perform the same type of historical review. Clover will follow this issue with the EUB and provide an update when it becomes available. Jan 15, 2004 The latest Energy Market Assessment (EMA) has been published by the NEB Short-term Natural Gas Deliverability from the Western Canada Sedimentary Basin 2003-2005 This report reviews all producing regions in the Western Canada Sedimentary Basin for production and decline rates, initial well productivity, drilling activity and short-term deliverability forecasts. The latest EMA shows that Southeast Alberta remains the second-highest producing region in the WCSB, after Foothills Front, and is forecast to remain so through 2005. Shallow gas is the largest contributor to the Southeast Alberta gas region and, hence, is a considerable component of the total WCSB gas production. The EMA forecasts a decline in WCSB gas production from 2003 to 2005, supporting strong gas prices and encouraging the development of low quality formations, including Coal Bed Methane and also lower-quality shallow gas plays. To access this report online: Link