川西气田长水平井定点分流酸压工艺及应用

doi:10.11885/j.issn.1674-5086.2023.12.26.31

西南石油大学学报(自然科学版) ›› 2025, Vol. 47 ›› Issue (5): 85-98.DOI: 10.11885/j.issn.1674-5086.2023.12.26.31

川西气田长水平井定点分流酸压工艺及应用

王峻峰¹, 王兴文¹, 任冀川^2,3, 何颂根⁴, 管晨呈⁵

1. 中国石化西南油气分公司石油工程技术研究院, 四川德阳 618000;
2. 西南石油大学石油与天然气工程学院, 四川成都 610500;
3. 油气藏地质及开发工程全国重点实验室·西南石油大学, 四川成都 610500;
4. 中国石化西南油气分公司油气开发管理部, 四川成都 610041;
5. 中国石油西南油气田公司工程技术研究院, 四川成都 618300

收稿日期:2023-12-26 发布日期:2025-11-04
通讯作者: 任冀川，E-mail:renjichuan_petro@qq.com
作者简介:王峻峰，1992年生，男，汉族，四川绵阳人，工程师，硕士，主要从事油气田提高采收率与增产技术等方面的研究工作。E-mail:447514841@qq.com
王兴文，1975年生，男，汉族，四川南充人，高级工程师，博士，主要从事油气田提高采收率与增产技术等方面的研究工作。E-mail:414913973@qq.com
任冀川，1988年生，男，汉族，河北涿州人，副研究员，博士，主要从事油气藏增产改造理论与技术等方面的研究工作。E-mail: renjichuan_petro@qq.com
何颂根，1987年生，男，汉族，四川自贡人，高级工程师，博士，主要从事天然气开发及开采的研究及应用。E-mail: hesonggen917@163.com
管晨呈，1997年生，男，汉族，重庆市人，博士研究生，主要从事油气田增产改造方面的研究工作。E-mail: 860738499@qq.com
基金资助:
国家自然科学基金青年基金（52304047）

Fixed-point Diversion Acid Fracturing Technology and Its Application in Long Horizontal Wells in Western Sichuan Gas Field

WANG Junfeng¹, WANG Xingwen¹, REN Jichuan^2,3, HE Songgen⁴, GUAN Chencheng⁵

1. Petroleum Engineering Technology Institute of Southwest Petroleum Branch, SINOPEC, Deyang, Sichuan 618000, China;
2. Petroleum Engineering School, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploration, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
4. Oil and Gas Development Management Department of Southwest Petroleum Branch, SINOPEC, Chengdu, Sichuan 610041, China;
5. Engineering Technology Research Institute, Southwest Oil and Gas Field Company, PetroChina, Chengdu, Sichuan 618300, China

Received:2023-12-26 Published:2025-11-04

摘要/Abstract

摘要： 川西气田雷口坡组气藏开发方式以“超长裸眼+衬管完井+定点分流酸压”为主。优质储层平面内酸压缝控范围是否合理、钻遇甜点储层能否充分控制是超长裸眼井段提高改造效果的关键。针对上述问题，基于产能模拟优化了不同储层类型的缝控范围，明确了非均质性对缝控范围的影响。建立了耦合井筒内酸液流动-反应、压力变化、酸蚀蚓孔生长及水力裂缝扩展的长裸眼井吸酸剖面数值模拟模型，针对入酸口位置、注酸参数和暂堵时机开展了优化。结果表明，优质储层内最优裂缝间距不超过180 m，致密条带厚度超过40 m会影响缝控范围；井筒内最大有效改造范围264.6 m，甜点分散时需采用暂堵手段调控吸酸剖面；段内暂堵时推荐暂堵时机为用酸量的一半，后压段推荐暂堵时机为前段后置暂堵或注酸50～100 m³时本段段内暂堵。基于研究结果形成了长水平井定点分流酸压工艺。该工艺应用于5口长水平井，平均无阻流量为235×10⁴ m³/d，较前期增加63.2%。

关键词: 川西雷口坡组, 长水平井, 定点分流酸压, 吸酸剖面, 暂堵时机

Abstract: The Leikoupo Formation gas reservoir in the western Sichuan gas field is mainly developed with the “ultra-long openhole + liner completion + fixed-point diversion acid fracturing” method. The correct of the acid fracturing control range within the high-quality reservoir in the planar direction and the effective control of sweet spot reservoirs are key factors in enhancing the stimulation effectiveness of the ultra-long open-hole sections. To address these issues, the study optimizes the fracture control range for different reservoir types through production simulations and identifies the impact of reservoir heterogeneity on the fracture control range. A numerical simulation model is established, which couples acid fluid flow-reaction, pressure changes, wormhole growth, and hydraulic fracture propagation. This model is used to optimize the acid injection location, injection parameters, and timing of temporary plugging. The research findings indicate that the optimal fracture spacing within the high-quality reservoir should be 6180 m, and a thickness of the tight band >40 m affects the fracture control range. The maximum effective stimulation range within the wellbore is determined to be 264.6 m, and temporary plugging methods need to be employed to regulate acid absorption profiles during sweet spot dispersion. The study recommends using half of the acid volume for the initial stage of temporary plugging, and for the subsequent stage, it suggests post-plugging after the first stage or temporary plugging within the segment when injecting 50～100 m3 of acid. Based on these research results, a long horizontal well fixed-point diversion acid fracturing technique is developed and applied to five long horizontal wells, resulting in an average unobstructed flow rate of 235×10⁴ m³/d, which represents a 63.2% increase compared to the previous period.

Key words: Leikoupo Formation of western Sichuan, long horizontal well, fixed-point diversion acid fracturing, acid placement profile, temporary plugging timing

中图分类号:

TE377

王峻峰, 王兴文, 任冀川, 何颂根, 管晨呈. 川西气田长水平井定点分流酸压工艺及应用[J]. 西南石油大学学报(自然科学版), 2025, 47(5): 85-98.

WANG Junfeng, WANG Xingwen, REN Jichuan, HE Songgen, GUAN Chencheng. Fixed-point Diversion Acid Fracturing Technology and Its Application in Long Horizontal Wells in Western Sichuan Gas Field[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2025, 47(5): 85-98.

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川西气田长水平井定点分流酸压工艺及应用

Fixed-point Diversion Acid Fracturing Technology and Its Application in Long Horizontal Wells in Western Sichuan Gas Field

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