Key technologies for TAML5 multi-lateral well drilling and completion of "three-high" gas wells in the Sichuan Basin

被引：0
|
作者：
Zheng Y. [1 ]
Ma Y. [1 ]
Fu Z. [1 ]
Wang Y. [1 ]
Zhang C. [2 ]
机构：
[1] PetroChina Southwest Oil & Gasfield Company, Sichuan, Chengdu
[2] Development Division, PetroChina Southwest Oil & Gasfield Company, Sichuan, Chengdu
来源：
Natural Gas Industry | 2023年 / 43卷 / 03期
关键词：
Three-high" gas well; Branch hole re-entry; Multi-lateral well; Precise MPD; Pressure balancing method; Sidetracking; Wall-mounted hanger;
D O I：
10.3787/j.issn.1000-0976.2023.03.010
中图分类号：
学科分类号：
摘要：
Multi-lateral well can greatly reduce oil and gas development cost, and it is one of the main well types for deep and ultra-deep oil and gas development in the future. To explore the adaptability of multi-lateral well in deep carbonate gas reservoirs and the new method for efficient development, this paper takes two multi-lateral wells (MX023-H1 and GS001-X52) deployed by PetroChina Southwest Oil & Gasfield Company in the Longwangmiao Formation and the Dengying Formation gas reservoirs of Gaoshiti-Moxi Block, the Sichuan Basin as examples to comprehensively analyze the geological characteristics of this block and the casing program design of the multi-lateral well with TAML5 completion, and then systematically carries out pilot tests on the drilling and completion technologies of TAML5 multi-lateral well. And the following research results are obtained. First, mechanical + cementing sealing is realized at all branch joints, which satisfies the selective re-entry conditions of later completion string and meets the requirements of TAML5 completion. Second, in the process of field construction, the successful setting of wall-mounted hanger is the key factor for the successful construction of a multi-lateral well, and the method of applying gyro azimuth measurement to judge the setting situation of wall-mounted hanger is accurate and reliable, which ensures the selective re-entry of later hole. Third, in the process of branch hole drifting and liner string running, the designed bend is applied to guide the string into the sidetracking window and the branch hole smoothly, which sufficiently confirms the accuracy and reliability of bend guiding technology. Fourth, in practice, a series of standard operation processes for the sidetracking and drifting of branch hole, the window entering and lowering of casing, and the setting of wall-mounted hanger are formed in detail. In conclusion, multi-lateral well is an important technological means to reduce drilling cost and improve recovery factor of oil and gas field, and the proposed multi-lateral well drilling and completion technologies suitable for "three-high" gas wells will further speed up the exploration and development of deep and ultra-deep oil and gas, ensure energy security and help the realization of "dual carbon" goal. © 2023 Natural Gas Industry Journal Agency. All rights reserved.
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页码：102 / 106
页数：4
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