Abstract
The Sabiriyah field in north Kuwait showed a depletion drive mechanism and a water flooding plan was needed. The Mauddud reservoir was tested through a Waterflood pilot which incorporated a pulse test data. The objective of the test is to assess reservoir connectivity, properties and water flow direction. The field's test data were matched through a pressure distribution with a slight heterogeneous and a homogeneous match. Using the field data, a small range of anisotropy orientation N10°E to N7°E was found. This orientation correlates to the sand fairways in the direction of SW-NE mentioned in the literature.
Two cases were used to verify that the first peak of the pulse test can be used in an interference analysis with a decreased value of total compressbility. For all cases, the well's sequence is the same as the original response but the separation between the three well's pressure responses was not as clear as the original data.
The Papadopulos-Ramey's method was used to evaluate the two matches of the Sabiriyah's pulse test. The slight heterogeneous match was used and the results were consistence with orientation of N8E and anisotropy ratio of 32. Also, the decreased value of total compressibility in the ideal case was verified using this method. The second homogenous match could not be evaluated because the field had a slight heterogeneity that affected the transmissibility result. Also, the gap in the diffusivity between the three wells is high, which can not be presented by the anisotropy alone, compared to the three ideal cases. In addition, ideal homogeneous modeled pulse test of the field with orientation of N8°E verified that the gap in diffusivity between the wells cannot be modeled without varying and decreasing the total compressibility value for the three wells.
