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随着塔里木盆地塔河油田、塔中奥陶系的高产井与四川盆地普光气田的相继发现,目前对海相碳酸盐岩表生岩溶储层及鲕滩储层预测的研究取得了一批对勘探生产具有实际指导意义的成果,初步建立了一整套与海平面升降、古地貌、沉积与层序地层、地震相、岩性等性质有关的古岩溶地质—地球化学—地球物理综合预测方法与模式。文中给出了建立岩溶地质模式的基本方法与实例,并介绍了在建立地质模型的基础上一些对岩溶储层预测的地球物理方法,有三维地震数据的相干体计算技术、地震属性综合分析技术、波阻抗反演技术、吸收参数流体检测技术、利用三维可视化进行古水系、古地貌恢复技术、神经网络模式识别技术、多参数融合储层评价技术,并分析了各种方法的应用原理及在不同地质条件下的局限性,提出了只有深入分析目标区古岩溶的地质条件、储层特征,建立岩溶储层地质模式,在建立、分析地质模式的基础上采用针对性的地球物理方法进行岩溶储层的预测才有可能获得成功。
With the discovery of Tahe Oilfield in Tarim Basin, the high-yielding Ordovician wells in Tarzan and the Puguang gas field in Sichuan Basin, a number of studies have been made on the prediction of marine carbonate karst karst reservoirs and oolitic beach reservoirs For the achievements of practical exploration in exploration and production, a comprehensive set of paleokarst geo-geochemistry-geophysical comprehensive prediction methods related to sea level rise and fall, palaeogeomorphology, sedimentary and sequence stratigraphy, seismic facies, and lithology are preliminarily established With pattern. Some basic methods and examples of establishing karst geologic model are given in this paper. Some geophysical methods for predicting karst reservoirs based on geological models are introduced. Coherency calculation method of three-dimensional seismic data, comprehensive analysis of seismic attributes , Wave impedance inversion technology, absorption parameter fluid detection technology, the use of three-dimensional visualization of ancient water systems, paleogeomorphology recovery technology, neural network pattern recognition technology, multi-parameter fusion reservoir evaluation techniques, and analyzed the application of various methods and principles This paper puts forward that only by analyzing the geological conditions and reservoir characteristics of ancient karst in the target area and establishing the geological model of karst reservoir, this paper puts forward that the geophysical method of karst Reservoir prediction is likely to be successful.