带开关功能的不限级滑套研制及应用

doi:10.11885/j.issn.1674-5086.2022.02.07.02

摘要/Abstract

摘要： 致密砂岩气藏储层岩石致密，自然产能低，水平井无限级压裂是高效开发的必要手段。常用的投球滑套分段级数受限、管柱缩径，难以实施储层评价、井筒维护等措施作业，泵送桥塞工艺虽可实现无限级分段，但施工不连续、作业成本高；同时，上述压裂装置均存在功能单一，无法满足生产控水等需求。根据气藏开发对工具“不限级、全通径、可开关、工序联作”的功能需求，创新全通径不限级滑套设计方法、提出环状凸齿与凹槽唯一配对的无限级实现方式，设计出具有复合弹片—多功能球笼的开启组件以及带选位槽和内藏胶筒的滑套本体，形成了全通径无限级可开关的滑套结构。工具系统已在川西中浅层致密砂岩气藏近200口推广应用，与国内外同类技术相比，作业效率可提高50%；成功在DS103—2等井实施选择性开关作业，为致密砂岩气藏高效开发提供了全新的工具系统。

关键词: 滑套, 不限级, 可开关, 评价测试, 现场试验

Abstract: Tight sandstone gas reservoirs is characterized by tightly rocks and low natural productivity. Infinite staged fracturing technology for horizontal wells is the necessary means of high efficient development for this gas reservoirs. It is difficult to implement measures such as reservoir evaluation and wellbore maintenance due to the limited segmented stages of ball throwing sliding sleeve and pipe string shrinkage, although the plug and perfortion can achieve infinite stages, but the construction is not continuous, operating costs are high. Meanwhile, those fracturing tools have single function, which cannot meet the needs of water control of production wells. According to the function requirement of "non-limited, full-bore, switchable, combined operation" gas reservoir, the theory of full-bore non-limited design is innovated, the open assembly with compound shrapnel-multi-function ball cage structure and the sliding sleeve body with position selection slot and inner rubber cylinder are designed, and the full-diameter sliding sleeve structure with infinite stage is formed. The tool system has been used to nearly 200 wells in tight sandstone gas reservoirs in Western Sichuan Basin. Compared with the same technology at home and abroad, the operating efficiency can be improved by 50%, the selective switch operation is successfully carried out in production wells such as DS103-2. It provides a new tool system for efficient development of tight sandstone gas reservoirs.

Key words: sliding sleeve, unconstrained stages, switchable, evaluation test, field test

中图分类号:

TE348

胡丹, 胡顺渠, 陈晨, 侯治民, 周怡君. 带开关功能的不限级滑套研制及应用[J]. 西南石油大学学报(自然科学版), 2022, 44(3): 224-234.

HU Dan, HU Shunqu, CHEN Chen, HOU Zhimin, ZHOU Yijun. Development and Application of Non-limited Sliding Sleeve with Switch Function[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(3): 224-234.

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