TX 75083-3836, U.S.A., fax +1-972-952-9435. AbstractThe cost savings that are possible by sidetracking existing wellbores make the drilling and completion of ultra slim lateral wells very desirable. Obtaining image logs from horizontal wells, less than 6" diameter, has always been a challenge, because the size of conventional borehole imaging tools that currently exist on the market are simply too large. In addition, conventional deployment methods limit efficient rig time utilization and ultimately lead to higher cost. New conveyance and logging technology from Welltec ® (the Well Tractor®) and Weatherford (The Compact Micro Imager -CMI) allows operators to obtain excellent image logs in slim wells as small as 3" in diameter. Image logs are required to properly understand fracture details and to help in future drilling and completion decisions. This paper describes the logging operational experience of the CMI and the world's first slim hole imaging logs in Saudi Arabia deployed by the wireline tractor 218XR (XR: Extended Reach) in an open hole horizontal section.
This paper presents the re-development strategy employed to recover attic oil from the highly-fractured crestal area of a carbonate reservoir. Optimum re-development strategies for the crestal area, along with planning and execution incorporating Best in Class (BiC) reservoir management practices are discussed.The crestal area was previously developed using full penetration vertical wells. After many years of continuous production and nearby injection, oil production rates in these crestal wells have declined with increasing water cut.The re-development strategy has been tailored to exploit this challenging opportunity and to maximize the production efficiently with selective placement of horizontal skimmer wells at the very top of the structure. Fit-for-purpose completion technologies were deployed to address the effects of the extensive fractures. Tapping oil continuously flowing into the crestal area by displacement, gravity, and capillary mechanisms, this re-development strategy has resulted in efficient and sustainable production.
This paper presents the re-development strategy employed to recover attic oil from the highly-fractured crestal area of a carbonate reservoir. Optimum re-development strategies for the crestal area, along with planning and execution incorporating Best in Class (BiC) reservoir management practices are discussed.The crestal area was previously developed using full penetration vertical wells. After many years of continuous production and nearby injection, oil production rates in these crestal wells have declined with increasing water cut.The re-development strategy has been tailored to exploit this challenging opportunity and to maximize the production efficiently with selective placement of horizontal skimmer wells at the very top of the structure. Fit-for-purpose completion technologies were deployed to address the effects of the extensive fractures. Tapping oil continuously flowing into the crestal area by displacement, gravity, and capillary mechanisms, this re-development strategy has resulted in efficient and sustainable production.
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