The Technologies Research And Application Of Reservoir Prediction In Buried Hill

Buried hill reservoirs are the most important exploration target in the sheng li oilfield. Most of the kiloton product wells in sheng li oil field are buried hill reservoir. However, there are many problems in the exploration. For example, complexity of the buried hill tectonic evolution, distributing rule of the buried hill structural crack, conditions of the oil-gas accumulation is very complicated. Whether we can avoid the multisolution brought from individual technique, find a series of methed and course to predict the buried hill reservoir and interpret the inner structural. Whether we can improve the prediction precision, and therefore reduce the drilling risk or not, has becomed the key technique which restrict the oil exploration in buried hill.we should Improve the accuracy of hydrocarbon reservoir prediction,and thus provide the believable predict result for the exploration of burial hill.In this thesis, discuss the composive prediction method in chegu201 buried hill. First, Based on the analysis of geologic material,the strata and reservoir of Well Chegu 201 is demarcated using well data and the demarcation result is that the burial hill reservoir is divided into three set vertically. The evolutionary process is classified into four tectonic stages according to the influence on the burial hill forming of Chegu 201 caused by tectonic movement at different stage.Grounding on study of geology and well logging data. Expounded the basic principles of seismic energy absorption analysis, seismic inversion technique, edge detect method with little wave, coherence technique, seismic attribute analysis technique, seismic facies analysis technique, forword and inverse tectonic simulation method. And apply all these techniques to predict fracture reservoirs in chegu201 area of shengli Oilfield. The distribution and thickness of the Paleozoic fracture reservoir in buried-hill was predicted successfully, and the good geologic results provided reliable basis for reporting the proved reserves. The method can avoid the multisolution brought from individual technique, and can improve the prediction precision, and therefore reduce the drilling risk. It also offered a reference research method for the reservoir prediction of other similar areas. Through the contrast of various methods of Reservoir Prediction in Buried Hil, we found the seismic inversion technique, Expounded the basic principles of seismic energy absorption analysis, forword and inverse tectonic simulation method have good result. The reservoir thickness is predicted based on the integration of multi-techniques, and the predict result shows that the oil-bearing area in Badou formation of Ordovician is 10 square kilometers,and the average effective thickness is about 40 meters. The calculation result in Fengshan formation is that the favorable oil-bearing area is about 8 square kilometers and the effective thickness is 50 meters.