Organization
Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China
Southwest Geophysical Research Institute, BGP Inc., CNPC, Chengdu 610213, China
Northwest Sichuan Gas Mine, Southwest Oil and Gas Field Company, PetroChina, Jiangyou 621709, China
Abstract
Previous researchers often use "dark spot" and "bright spot" to predict karst reservoir of Maokou Formation and guide exploration well layout, but in practices, we often found there are many explanations for "dark spot" and "bright spot", which are affected by lithology and other factors. In order to make clear the development characteristics of Maokou Formation karst reservoir in XC area, based on the analysis of seismic response characteristics of Maokou Formation reservoir in XC area by the 3D seismic data, the prediction of sedimentary facies belt, restoration of paleogeomorphology and extraction of sensitive attributes were carried out to predict the favorable area of karst reservoir development. The results show that: when the reservoir at the top of Maokou Formation is developed, the top boundary of Maokou Formation has the response characteristics of weak amplitude "dark spot", and the wave trough under the top boundary of Maokou Formation has the response characteristic of weakening amplitude; when the content of mud in Maokou Formation increases, there will be "bright spot" indication, which needs comprehensive analysis with sedimentary facies; the development of karst reservoir is mainly controlled by sedimentary facies, palaeogeomorphology and faults.
论文详情