Present Situation and Progress of Geosteering Drilling Pre-prospecting Technology

doi:10.3969/j.issn.1006-6535.2021.02.001

Abstract

Abstract: Geosteering drilling pre-prospecting technology can effectively improve drilling efficiency and success rate. There are three types of geosteering drilling pre-prospecting technology: near-bit pre-prospecting, seismic-while-drilling pre-prospecting, and azimuth electromagnetic wave pre-prospecting. With case study of exploration and development of complex oil and gas reservoirs, methods widely used in the geosteering drilling pre-prospecting technology were analyzed and summarized, including near-bit measurement, R-VSP, VSP-WD, bed boundary mapping, reservoir mapping while drilling, and looking ahead while drilling. All kinds of geo-steering pre-prospecting technologies can be used for measurements in different ways, but they all have certain limitations. There is a need for pre-prospecting tehcnologies to conduct further studies on the improvement of prospecting accuracy and the combined application of multiple methods, so as to provide strong technical support for casing setting depth design, formation pressure prediction, mud density window setting, detailed description of complex oil and gas reservoirs, and drilling trajectory optimization for the application of pre-prospecting technologies. The study can provide a strong reference for domestic research and field application of geosteering drilling pre-prospecting technologies.

Key words: geosteering drilling pre-prospecting technology, near-bit pre-prospecting technology, seismic-while-drilling pre-prospecting technology, azimuth electromagnetic wave pre-prospecting technology

CLC Number:

TE928

Lin Xin, Yuan Renguo, Qin Lei, Liu Suzhou, Su Chaobo, Lu Zhongyuan, Yu Zhongtao, Tan Weixiong. Present Situation and Progress of Geosteering Drilling Pre-prospecting Technology[J]. Special Oil & Gas Reservoirs, 2021, 28(2): 1-10.

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