STUDYON DISCRIMINATION TECHNOLOGY OF OILANDGAS RESERVOIRS BY IGNEOUS ROCK AND ROCK LOGGING IN GULONG OILFIELD, SONGLIAO BASIN, CHINA

摘要

This paper takes the logging reservoir evaluation of Gulong Oilfield in Songliao Basin as the research object. Based on conventional logging data, acoustic imaging and other well logging methods, the drilling core and experimental well simulation are used as the means to systematically evaluate tlic complex characteristics of igneous rocks. Characteristics of oil and gas lithologic reservoirs. Through the research in this paper, the results are obtained: Based on reservoir porosity, penneability. water saturation and other reservoir parameters, the Putaohua layer is divided into lower, middle and upper parts according to the changes of the two sedimentary transition surfaces and the short-term base surface cycle. The porosity of brcccia-likc rough rock is mostly beUveen 5 to 25. prediction results of attenuation characteristics of well-free constrained spectrum imaging based on seismic data information, and well-constrained high-resolution resistivity pseudo-acoustic impedance inversion results, fused into a dimensionless class. The attribute, from the logging in-version section, the corresponding small layer of sand body is reflected on the section, the recognition ability can be more than 2 meters; after reconslmct-ing the acoustic time diflcrcncc curve result, the igneous rock distribution and the favorable reservoir can be accurately judged and analyzed. To improve the ability to develop oil and gas reservoirs in igneous rocks.