This book is written from the point of view of theoretical depth as well as the summary of practical expe-riences,some basic problems are dealt with typical of oil field heterogerieities of fluid and flow field from sixlevels. Besides,the author improves the formula of oil recovery efficient utilization factor. In this book,the ge-ologic characteristics, reservoir behaviours and countermeasures during oil field development have been dealtwith respectively. This decides the structure feature of the whole work and marks a great distinction fromother works.