Well Test Analysis for Multilayered Reservoirs with Formation Crossflow

Index

Note: Page numbers followed by f indicate figures, and t indicate tables.

A

Approximate analytic solutions, diffusivity crossflows 

arbitrary functions 294

area crossflow rate 71–72, 294

asymptotic steady value 294

dependent variables 292

dimensionless crossflow velocity 71

exponential integral function 293

flow conditions 291

homogeneous equations 295

long time period 69–71

middle time period 69

net crossflow velocity 71, 294

numerical calculations 72

pressure differences 70, 293

short time period 69–70

steady peak value 294

B

Buildup pressure 143–144

Buildup well tests 

high diffusivity layer 

area crossflow rate 42f, 43–44

wellbore pressure 40–42, 40f

low diffusivity layer 

area crossflow rate 46f, 47

wellbore pressure 44–46, 44