Rovers, often described as one of the best passing sides in the Championship, had goalkeeper Neil Sullivan to thank for helping to secure a point from a goalless draw with several outstanding saves.
Oster said: "On the whole I didn't think we created as much as we have done in previous games.
"We've come to Reading, it's not an easy place to come to and we have got a well-deserved point. It was a hot day out there and when we got the ball we didn't use it as well as we can do.
"Normally we're quite good at passing the ball and we were disappointed we couldn't create a little bit more.
"Looking on the positive side of things, it's another clean sheet and another point on the board."