基金项目:重庆市自然科学基金项目(CSTC2012JJB9007); 重庆市科技攻关计划项目(cstc2012gg-yyjsB90004)
通讯作者:郭东鑫(1984-),男,山东临沂人,助理工程师,E-mail:shmilydongxin@163.com
At present,most of the research on the marine shale gas in south of China is focus on the basic geological theory which have been centered on its accumulation mode,favorable area evaluation,etc.In the application of geophysical techniques to identify shale gas prediction and evaluation of shale gas yield rich region some explorations carried out,while the complete set of technology idea and method unlike conventional oil and gas exploration is still at the exploratory stage.On the basis of field geological survey and the regional geological understanding,thirteen 2D seismic profiles,totally 523.5 km have been carried out.Since the relief is complex,there are more obstacles,the seismic data acquisition is difficult; wide limestone covering,poor shallow seismic geological conditions,low seismic record S/N ratio,thus caused conspicuous problems in statics correction and velocity analysis.Through integrate research of seismic data acquisition,processing,interpretation,reservoir fluid identification,the seismic data of high signal-to-noise ratio was obtained.And then the mountain marine shale gas geophysical exploration technology was developed with respect of the shale gas geological seismic conditions in the block.The optimal datum static correction method was used to solve static correction,pre-stack de-noising to improve the signal-to-noise ratio,overlay and migration to improve the image quality.On this basis,discover the seismic inversion of reservoir and gas detection technology,provides a solid foundation for Block optimization and well location selection.This prospecting depicted fine the top structural configurations and the buried depths of the Longmaxi groups and the Niutitang groups,East and north of the fault zone near the main north-south; preferably two sets of target layer favorable target areas,the deployment of two parameters wells bit.