Abstract
Deepwater gravity flow deposits in the Niger Delta Basin are an important exploration and development target in West Africa. Reservoir A in OML130 block is mainly composed of combined incised channel systems. Channels formed in different periods overlap each other vertically and are partially incised and connected, which is very important for the oilfield development. In view of the above characteristics and to represent the vertical aggradation and lateral swaying characteristics, a two-step workflow for 3D geological modeling was adopted: first the construction of a “macro”-framework and then of a sand group embedding. With the help of time-lapse seismic monitoring information, the water-flooding area was detected and picked to characterize connected areas of the incised channels, and then modeled quantitatively. The sedimentary facies modeling method was established using multiple control conditions to obtain a simulated reliable three-dimensional geological model. Dynamic data show that the modeling method used in the present work is effective and has high practical value.
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