Pal, Arindam (Cairn India Limited) | Chowdhury, Manabesh (Cairn India Limited) | Phinney, Eric (Cairn India Limited) | Das, Amlan (Cairn India Limited) | Dwivedi, Nikhilesh (Cairn India Limited) | Lobo, Kenneth (Schlumberger Asia Services Limited)
Barmer Hill is a low permeability lacustrine reservoir complex of Paleocene-Eocene age deposited in Barmer Basin, North West India. In Mangala-Aishwariya area, this reservoir consists of laminated, high porosity (25-35%), low permeability (~0.2-4 mD) porcellanites of biogenic origin. Commercial development of analogue low permeability reservoirs are carried out with multi-stage hydraulic fracturing in horizontal wells. This paper outlines the planning to execution of three
Mangala and Aishwariya fields are tilted fault blocks with 3-way fault closure bound by a major down-to-the-west normal fault. The structural complexity is exacerbated by a series of cuspate, low angle listric faults in the Barmer Hill Formation. The gravity faulted area is structurally complex and seismic imaging is challenging. Downdip towards the east, the Barmer Hill Formation is well imaged and the units gently dip (2o −10o) south-east.
Detailed reservoir characterization work is carried out before horizontal well planning in the structurally complex tight reservoirs of Barmer Hill. Transverse and longitudinal horizontal wells are designed along the principal stress directions to prove the
Drilling with a three casing policy in Barmer Hill, the 8-1/2" intermediate section of the well is landed right below the top of target reservoir at an optimum inclination. In 6" drainhole section, the inclination is either built-up or dropped to align the trajectory with the formation dip appropriately. The well azimuth is primarily guided by the regional understanding of principal stress directions and collision constraints. The drainhole section is geo-steered through the target reservoir with a state-of-art bed boundary mapping tool.
In Barmer Hill, Well-1, a transverse