An integrated technology based on seismic, LWD, mud logging and geosteering and its application

Abstract

Horizontal well is widely used to increase geological reserve and hydrocarbon production in the oil and gas industry. The exploration and development of oil and gas are currently facing these challenges that the oil and gas are becoming poorer in quality and the geological targets are getting more complicated. What’s more, the reservoir parameters in front of the drill bit cannot be measured from LWD, so it is very difficult to predict the change of the reservoir in advance. Data acquisitions of LWD, mud logging and drilling are relatively independent, and they cannot be fully used. This paper describes the integrated technology based on seismic, LWD, mud logging and geosteering, this technology uses database and network as a link to integrate collaborative platform used for LWD, mud logging, drilling, geosteering and hydrocarbon reservoir evaluation. Through data sharing, remote monitoring decision and drilling risk monitoring, well trajectory control and adjustment, real-time discovery and rapid evaluation of oil and gas can be realized. The field application shows that through integration of the data from seismic, LWD, mud logging and geosteering to establish the geological modeling, borehole trajectory tracking and geological model adjusting, geosteering gets more accurate and reservoir-encountered rate is up to more than 90%. The integrated technique based on seismic LWD, mud logging and geosteering can be made full use of their respective advantages to optimize the well trajectory, and improve the success rate of drilling.