塔里木盆地九年油气勘探历程与回顾(续)

Course and Review of Nine-Year Petroleum Exploration in the Tarim Basin (continued)

牙哈大油气田高速、高效的发现和探明,归功于加强了区域地质,特别是二级构造带、断裂带的研究,进行了1.2×10~4km^2的大面积工业制图,从而选准了轮台断隆上最有利的牙哈构造带,而在两口预探井发现了第三系—白垩系油气层后,决策者果断决策,敢冒风险,在一个长60km的构造带上分三批超前部署和实施了10口探井评价井和660km^2三维地震,又起了至关重要的作用,面对埋深在5000m以下的复杂地层,先后采用地震、钻井、测井、测试新技术,又保证了牙哈油气田的勘探高效益。

High-speed and high-effective discovery and prove of Yaha oil and gas field can be attributed to the efforts to step up the research on regional geology, especially secondary structural zone and faulted zone. Industrial maps have been made for the 1.2×10~4km^2 area, leading to an accurate selection of the most prospect Yaha structural zone of Luntai faulted uplift. After two wildcats discovered the Tertiary-Cretaceous oil and gas layers, the policy-makers have made decisions to deploy and drill 10 exploration wells and evaluation wells and a 660-ssquare-kilometer 3-D seismic survey on a 60-kilometer structure belt. Those measures have played an important role. As for the complicated strata with a 5000-meter buried depth, new techniques have adopted for seismic, drilling, well-logging and well-testing to ensure high exploration effectiveness for Yaha oil and gas field.