Details

Autor(en) / Beteiligte

• CHENG Shi-qing(程时清) ZHANG Shen-zhong(张盛宗) HUANG Yan-zhang(黄延章) ZHU Wei-yao(朱维耀)

Titel

SENSITIVITY COEFFICIENTS OF SINGLE-PHASE FLOW IN LOW-PERMEABILITY HETEROGENEOUS RESERVOIRS

Ist Teil von

• Applied mathematics and mechanics, 2002-06, Vol.23 (6), p.712-720

Ort / Verlag

Faculty of Petroleum and Nature Gas, Petroleum University in Beijing, Changping, Beijing 102249, P R China%Institute of Porous Flow and Fluid Mechanics, Academia Sinica, Langfang, Hebei 065007, P R China

Erscheinungsjahr

2002

Quelle

SpringerLINK Contemporary (Konsortium Baden-Württemberg)

Beschreibungen/Notizen

• Theoretical equations for computing sensitivity coefficients of wellbore pressures to estimate the reservoir parameters in low-permeability reservoirs conditioning to non-Darcy flow data at low velocity were obtained. It is shown by a lot of numerical calculations that the wellbore pressures are much more sensitive to permeability very near the well than to permeability a few gridblocks away from the well. When an initial pressure gradient existent sensitivity coefficients in the region are closer to the active well than to the observation well.Sensitivity coefficients of observation well at the line between the active well and the observation well are influenced greatly by the initial pressure gradient.