含油气系统在老油区滚动勘探中的应用与效果——以圣地来哥油田为例

Application and effect of oil-gas-bearing system in progressive exploration of old oildom——taking Sandirego oilfield as an example

圣地来哥 (Sandirego)油田是 6 0年代投入开发的老油田。该文针对油田具体地质特点 ,建立了“凹陷—斜坡关联体”含油气系统概念模型。通过大量钻井、地质、地震、测井、油藏工程资料的分析 ,在各含油气子系统 ,尤其是圈闭和储集子系统评价等方面取得了突破性的认识。文中指出 ,圣地来哥斜坡北缘 1号断层下降盘逆牵引滚动背斜带和西部低部位断块群 。

Sandirego oilfield is an old one put into development in 1960's. A concept model of “sag?slope association” oil?gas?bearing system is built according to the specific geologic characteristics of the oilfield. It makes a breakthrough in the knowledge of each subsystem of oil and gas bearing, especially in the knowledge of evaluation of trap and reservoir subsystem, through the analysis of large number of data on drilling, geology, seismic, log and reservoir engineering. It is pointed out that there are two new targets in stepout progressive exploration with excellent prospect and potential, one is rolling anticlinal belt with reverse drag of No.1 downthrow side at the north edge of Sandirego slope, the other is a group of fault blocks at low position in the west.