摘要
秘鲁塔拉拉油区是一个已有120多年勘探开发历史的老油区。已有探井3321口,开发密度已达到每平方公里24口井。目前油田开发已到了产量递减的后期。本区过去除了作过1∶10万重力普查,部分地区作过1∶5万重力详查,地震属空白区。曾通过补钻来稳定产量,但未获成功。为此,决定进行三维地震。1995年石油地球物理勘探公司承接该项目的三维采集、处理和解释的全部工程。通过三维地震搞清了油田的整体地质状况,含油气储集层分布规律,井与井之间地层和储集层的横向变化等,找到了有利断块和其它类型构造,调整了油田开发部署,提高了钻探成功率。
The Talara oil area in Peru is an old oil area with an exploration & development history of over 120 years. There are 3321 exploration wells. the development density is 24 well/km^2. At present, this oil area comes to the late stage of production decline. In the past. besides the 1: 100, 000 gravimetric reconnaissance, the 1: 50, 000 detailed gravity survey was also done in some areas, but the whole area is the seismic gap. The effort for stabilizing producting through adding wells was failure. Therefore, the 3-D seismics were proposed. In 1995, the Petroleum Geophysic Exploration Company undertook the all engineering from 3-D scismic collection, treatment and interpretation. Based on the 3-D seismic cata, the whole geological setting, reservoir distribution of this area 1s clarified, the lateral change of formations and reservoirs among wells are known. The favorable fault blocks and other structural types are found, so the drilling success ratio is raised through the adjustment of development deployment.
