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Abstract

Evidence is presented for the widespread presence of sand injectites in mudstone- prone units in the deep-water sandstones of the Ty formation (Paleocene). Pressure communication throughout the field during production demonstrates that the laterally extensive shale layers in the reservoir are not barriers to cross-flow. Centimeter- scale sand injections are recognized in core, and sedimentary features commonly associated with meter-scale sand injectites are also identified. These remobilized sandstones are interpreted to facilitate fieldwide cross-flow, possibly augmented by subseismic- resolution faulting. Evidence for fault-induced or erosional dissection of the mudstone units is lacking. These injection features are similar in scale and appearance to sand injectites known from other reservoirs.

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