| Popis: |
Mauddud reservoir in the Greater Burgan field is a thin, carbonate reservoir containing light oil in a 10-20 ft target zone with "good" porosity. Matrix permeability is low and natural fracture density can be quite variable in this reservoir. Thus, this reservoir must be exploited using horizontal wells in all areas. In areas where fractures may not be dominant, it is crucial to achieve maximum reservoir contact (MRC) through the well architecture. To this end, a tri-lateral MRC well with a mother bore and two laterals has been recently drilled in this reservoir achieving about 5,000 ft of reservoir contact. This paper details the process followed to achieve this milestone for the first time in Kuwait. A multi-disciplinary team consisting of Geology, Petrophysics, Geophysics, Drilling, and Service Company was instrumental in utilizing state-of-the-art 3D seismic interpretation, LWD resistivity at bit, real-time imaging, and distance to boundary measurements to place this first MRC well for the Kuwait Oil Company (KOC) entirely within the thin target zone. Real-time decision-making was possible due to seamless integration of all data and interpretation from various disciplines. Internet-based platform was extensively used in this project. Local formation dip changes were computed and well trajectory revised in real time due to such integration. The process used in this project to place a complex well entirely in a thin target would be applicable to all thin reservoirs that must be exploited through horizontal wells. Technical contributions discussed in this paper include effective utilization of LWD data to make real-time geo-steering decisions in a thin target, process for real-time calculation of distance to the top (or bottom) and dip changes based on LWD data, and effectiveness of Internet-based platform for communication and decision-making process. |
