The Buried Hill Fracture Reservoir Prediction Based On The 3D Post-stack Seismic Data

Buried hill reservoir is one of the important research fields of oil and gas exploration and development in our country,the fractured reservoir of oil and gas exploration and development is particularly important.Buried hill as an important field of oil and gas exploration,have good accumulation conditions and exploration potential,enrichment and high yield,and are in technical workers' good graces in the oil industry.In the buried hill reservoir description we often encounter the following problems: poor quality of seismic data,strong heterogeneity in the buried hill reservoir,the reservoir is given priority to with cracks,holes,and anisotropic complex,and they are greatly increased the difficulty of the buried hill reservoir exploration.This article mainly aims at solving those difficult problem such as buried hill development,burial depth,less well,conventional method's coincidence low rate.By using of geological,logging and seismic data,improving the conventional method,under the control of seismic facies,we summarized a set of suitable for buried hill fracture reservoir prediction technology process.The thesis mainly discusses three aspects :(1)we make a summary of predecessors' research results,select three conventional methods of fracture prediction such as correlation analysis,three-dimensional curvature and edge detection,and then analyze their detection results of fracture;(2)For the low coincidence rate.of the conventional methods,we put forward other three special analysis methods: direction enhancement processing,frequency-divided coherence and waveform classification technique,in order to achieve the cracks of multi-scale and multi-resolution prediction,and the division of the fracture development zone.(3)Based on 3D post-stack seismic data,we carries on the instance of the buried hill fracture reservoir prediction and analysis.Bohai work area of the buried hill is carbonate buried hill,and its reservoir is fracture-pore type reservoir.We applied the improved coherence analysis,edge detection,frequency-divided coherence to the study area and under the control of seismic facies,realize the comprehensive prediction of crack and the work area of favorable reservoir prediction.The results showed that: In the I facies belt,we detect the crack development very much,but because it is erosion is serious,the stratum is thinner,so it is not a favorable location of reservoir;In the II facies belt,the prediction results show that the crack development,but the formation of here thicker,is advantageous to the oil and gas storage,we believed that there are the places of favorable reservoirs located.