During the past four or five years, Vertical Seismic Profiles have been run in a large number of wells and in a variety of geological provinces with the object of assisting the seismic data processor and improving the geological interpretation. The special properties of the Vertical Seismic Profile, which allows the separation of the upward and downward travelling components of the recorded waveform, provides a means of studying the acoustic response of the earth in detail. Deconvolution of the data in particular gives a clearer understanding of the mechanics of multiple reflections and the way in which they may obscure primary reflections in the vicinity of the well. The primary reflection response of the earth can be observed with greater resolution than conventional seismic data permits, making correlation with lithology more precise, and allowing a good estimate of the reflection coefficient series to be determined. Inversion of the seismic traces to produce an acoustic impedance log leads to better definition of the sedimentary sequence and is of particular interest in predicting lithologic variations ahead of the drilling bit. In addition, Vertical Seismic Profile data can be used to assess parameters in areas such as deconvolution and signal band width for the evaluation of conventional seismic data.

One of the most popular novelists of the twentieth century, winner of a Pulitzer and Nobel Prize for Literature and an active social and political campaigner, particularly in the field of women's issues and Asian-American relations, Pearl Buck has, until now, remained 'hidden in public view'. Best known, perhaps, as the prolific author of The Good Earth, Buck led a career which extended well beyond her eighty works of fiction and non-fiction and deep into the public sphere. In this critically acclaimed biography, Peter Conn retrieves Pearl Buck from the footnotes of literary and cultural history and reinstates her as a figure of compelling and uncommon significance in twentieth-century literary, cultural and political history.

No abstract

No abstract

No abstract