Well Cleaning Technology for Highly Deviated and Extended Reach Wells in Jidong Oilfield

doi:10.11885/j.issn.1674-5086.2015.08.04.03

Abstract

Abstract: With progress in exploration and development of the Jidong oilfield, the number of highly deviated and extended reach wells is increasing year-after-year, thereby leading to the problem of well cleaning. In accordance with the characteristics of highly deviated and extended reach wells, we analyzed the causes of cutting bed and cutting transport laws, and optimized hydraulic parameters based on the hydraulic calculation mode. We simulated flow characteristics of the fluid around EHCDP by means of computational fluid dynamics(CFD), and evaluated drilling fluid materials to maintain drilling fluid properties. Taking real-time well cleaning monitoring and high efficiency drilling fluid materials into consideration, we improved the level of well cleaning from design to drilling. In addition, we formed a set of technical measures for improving flow condition of wellbores of highly deviated wells, which provides technical support for safe drilling. Application of improved technical measures to highly deviated wells shows that problems, such as bit freezing, caused by inadequate hole cleaning rarely occur during construction.

Key words: Jidong Oilfield, highly deviated and extended reach well, hole cleaning, cutting bed, matching technical measures

CLC Number:

TE21
TE243

XU Xiaofeng, SUN Ning, MENG Yingfeng, SONG Wei, WEI Na. Well Cleaning Technology for Highly Deviated and Extended Reach Wells in Jidong Oilfield[J]. 西南石油大学学报(自然科学版), 2017, 39(1): 148-154.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2015.08.04.03

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2017/V39/I1/148

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