• 综合研究 •

### 基于高效架桥和致密填充的深层裂缝性储层堵漏配方设计方法研究

1. 1. 西南石油大学油气藏地质及开发工程国家重点实验室,四川 成都 610500
2. 中国石化石油工程技术研究院,北京 102206
• 收稿日期:2021-07-08 出版日期:2022-06-26 发布日期:2022-06-24
• 作者简介:许成元（1988—）,男,博士,博士生导师,副教授。主要从事储层保护理论与技术、工作液漏失控制、颗粒物质力学与颗粒流领域的科研与教学工作。地址：四川省成都市新都区新都大道8号,邮政编码：610500。E-mail： chance_xcy@163.com
• 基金资助:
国家自然科学基金项目“基于逾渗和固液两相流理论的裂缝性储层工作液漏失损害预测与控制”(51604236);国家自然科学基金项目“海相深层油气富集机理与关键工程技术基础研究”(U19B6003);四川省科技计划项目“保护储层并改善优势天然裂缝导流能力的钻井预撑裂缝堵漏基础研究”(2018JY0436);非常规油气层保护四川省青年科技创新研究团队项目“保护储层并改善优势天然裂缝导流能力的钻井预撑裂缝堵漏基础研究”(2021JDTD0017)

### Design method of plugging formula for deep naturally fractured reservoir based on efficient bridging and compact filling

XU Chengyuan1(),YANG Yang1,PU Shi2,KANG Yili1,LI Daqi2,ZHANG Dujie2,YAN Xiaopeng1,YANG Bin1

1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
2. Sinopec Research Institute of Petroleum Engineering, Beijing 102206, China
• Received:2021-07-08 Online:2022-06-26 Published:2022-06-24

Abstract:

Drilling fluid loss is an important engineering and technical problem that restricts deep and ultra-deep drilling, and the well loss in reservoir interval is the most serious reservoir damage mode in drilling and completion stage. It is the main way to control lost circulation to use the bridging plugging material to block the fracture leakage channel. However, the design of bridge plugging formula often adopts the empirical or semi-empirical method, leading to low plugging success rate and poor plugging effect. By the CFD-DEM simulation, it is clear that the bridge retention, accumulation filling and pressurized plugging are three key links in the formation process of fracture sealing layer. Considering the efficient bridging and compact filling of the plugging material, and based on the concept of “absolute bridge addition” and the theory of tight packing, a new experimental formula design method for pressurized plugging is proposed. “Absolute bridging amount” is used as a optimization parameter to determine the bridging material amount in the formula. The traditional compact packing theory is improved by the “complementation method”, which overcomes its defects of poor adaptability to the filling materials with discontinuous or overlapping particle size distribution, and determines the filling material addition in the plugging formula. The results of laboratory and field experiments show that the proposed method can realize the rapid and efficient design of the formula for deep naturally fractured reservoir, effectively ensure the sealing effect of the formula for deep naturally fractured reservoir and reduce the total amount of materials in the formula and save the material cost. The proposed method provides a new idea and theoretical basis for the design of plugging formula for deep naturally fractured reservoir.

• TE357