Study Of Seimic Acquisition Technology In Complex Downtown Field

Jiyang depression, the principal exploration area in Shengli Oilfield , is at the maturity exploration stage, with the development of exploration theories and technologies, there is still large potential. With the limitation of the surface and underground structure conditions, in the past dozen of years, seismic exploration has been operated by the Shengli Geophysical Corporation in Boxings Yangxku Guangraos Lijins Wudis Zhanhuas Binzhou and Dongying, w hich c ontributed a 1 ot t o t he p rogress o f S hengli O ilfield. However, with the limitation of ally for the low signal/noise ratio and low resolution, the exploration and development are greatly restricted.This thesis deals with the sophisticated surface condition methods, in the downtown field, with unsatisfied r esult o r h igher cost, t he normal 3 D e xploration m ethods s ometimes e ven cannot be operated. The designs surveys deployment of receiving points are all obstacles. With the application of satellite map s reasonable deployments swath designs quality control software and analysis of grid properties, the difficulties are solved and successful data are acquired in Dongying Binzhou exploration projects, which also gain good effects and economic benefits. At the same time a series of exploration techniques are summarized.During the operation process, through controlling the geophone burial quality drilling quality and avoiding strong noise disturbance as well as timely analysing by the field process system, the single shooting quality is improved to a great degree.With scientific design and strict field operation, the 3D acquisition gain much better results and higher mid-shallow resolution and mid-deep s/n ratio, which is seen from the data and initial stack sections. These acquisitions supply valuable operating experience and make solid foundation for further high-precision 3D acquisition projects in the oilfield.With new methods and technologies, comparing with the old data, the new data gain improved s/n ratio and resolution clear mid-shallow fault condition and structure obvious distribution of sand body The s/n ratio below 3500m in Dongying is greatly improved. After final process and interpretation, the geological storage is about 30 million tons. The Binzhou 3D data, in the course of processing ,fill the blank in the old data, and make foundation for further acquisition. These advanced techniques can be popularized all round the world, and supply technical guarantees for the Shengli Geographical Corporation to enlarge its market inside and abroad, and will gain massive economic and social benefits.