简答题 翻译：An oil field may have several hundred wells with flow lines that carry crude oil from the wells to the lease tanks.

问答题翻译：The separation between the various reservoirs is demonstrated in each case by different oil water and gas oil contacts in most reservoirs.

问答题翻译：Traps of this type were formed after the deposition of the reservoir rock by erosion and or alteration of a portion of the reservoir rock through solution or chemical replacement.