Stability Evaluation of Gaoquan Test Horizontal Well in Southern Margin Based on Finite Element Method

doi:10.11885/j.issn.1674-5086.2020.10.29.01

Abstract

Abstract: Qingshuihe Formation reservoir in Gaoquan Anticline in the south margin has the characteristics of high temperature, high pressure, high yield and ultra deepth. There is no mature completion case to follow in China. In this paper, the wellbore and formation stability models of pre perforated screen completion and casing perforation completion are established respectively for horizontal wells in target area, and numerical simulation study on wellbore stability in whole life cycle is carried out for opital completion mode. The results show that when the wellbore is along the direction of the minimum horizontal principal stress, the hole stress concentration is the maximum parallel to the minimum horizontal principal stress direction, and is the minimum perpendicular to the minimum horizontal principal stress direction, and the wellbore damage will start from the outer wall hole; the screen pipe and casing will only produce partial plastic deformation, with the deformation less than 5%, and small possibility of collapse, but the formation which screen tube completion is bound to collapse in the late production stage, and the perforated formation after cementing is relatively stable. Based on the wellbore stability, perforation can be preferentially recommended for such horizontal wells with similar characteristics in the target area.

Key words: horizontal well, three high and one deep, completion, wellbore stability, producing pressure

CLC Number:

TE257

LIU Tao, LIU Feihang, MA Dudu, GUO Ling, WU Yue. Stability Evaluation of Gaoquan Test Horizontal Well in Southern Margin Based on Finite Element Method[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(4): 91-99.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2020.10.29.01

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