第34卷第2期 2017年3月
钻井液与
究
井液
DRILLINGFLUID&COMPLETIONFLUID
doi: 10.3969/j.issn.1001-5620.2017.02.008
裂缝网络地层钻井液漏失模拟李大奇1.2，刘四海1.2，林永学1.2，康毅力3
Vol. 34 No.2 Mar.2017
（1.中国石化石油工程技术研究院，北京100101；2.页岩油气富集机理与有效开发国家重点实验室，北京100101；
3.西南石油大学·油气藏地质及开发工程国家重点实验室，成都610500）
李大奇，刘四海，
林永学，
等.裂缝网络地层钻井液漏失模拟[].钻井液与完井液，2017，34（2）：45-50.
LI Daqi, LIU Sihai, LIN Yongxue, et al.Simulation of mud loss in formations with fracture network[JJ.Drilling Fluid &
Complerion Flerid.
摘要
年费英生的失行为进行模扌
教商
天存在明
商
L1Oz
究囊
2
用优动可以用：
: 45-50
时站
数值模抵得到的需失量与理论漏失量十分接近
关链词
数蜂性地点
中图分类号：TE282
：开册
编失模型
两路地
范开
款缝应对数整性式清装度车可牌
应力敏
文献标识码：A
·溺失模型
三维离般裂缝网络地层模型。采
元法求解该模型，对钻并减新
张工
简附近裂缝内钻井液流速
支动现票
应式单愿性局
与单素裂缝的漏
钻井液漏失量增加：
开究成果可有效识剧出裂维网络需失
文章编号：1001-5620（2017）02-0045-06
Simulation of Mud Loss in Formations with Fracture Network
LI Daqi-2, LIU Sihail-2, LIN Yongxuel-, KANG Yili?
(1. Sinopec Research Institute of Petroleum Engineering, Beijing 100101;2. State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101;3. State Key Laboratory of Oil and Gas Reservoir
Geology and Exploitation, Southwest Petroleam University, Chengdu, Sichuan 610500)
Abstract Based on the Monte Carlo random modeling theory, a 3-D discrete fracture network formation model has been established in an effort to solve the mud loss problem taking place in complex fractured formations. Using the Bingham model drilling fluid, a model describing the mud losses in networked fracture formations was established. This model took into consideration the linear deformation of the fractures. The model was calculated using finite element method to simulate the behavior of mud losses. Studies showed that this model was able to dynamically simulate the flowrate, rate of mud losses and total volume of mud losses inside a fracture. In fractures that were near the borehole wall, the mud flowrate was high, while in fractures that were far from the borehole wall, the mud flowrate was low. After logarithm transformation, the rate of mud loss curve showed obvious irregular fluctuation phenomenon, quite different from the behavior of mud losses in a single fracture. This phenomenon can be used to identify a formation with networked fractures. The stress sensitivity of fractures had greater effect on mud losses. Taking into account the stress sensitivity, the volume of mud losses increased. The volume of mud losses calculated from numerical simulation was close to the theoretical volume of mud losses, indicating the high reliability of the model established. Field application showed that the studying results can be used to find out mud losses into networked fractures. A mud loss control program based on this study was successfully used in controlling a mud loss just in one shot.
Key werds Fractured fomation; Mud loss; Bingham fluid; Stress sensitive; Mud loss model
基金项目：国家科技重大专项（2011ZX5005-006）和国家自然科学基金重大项目（51490650）资助，
第一作者简介：李大奇，副研究员，1982年生，现主要从事防漏堵漏及并壁稳定方面的研究工作。电话（010）
84988596 ; E-mail : Idqcwct@163.com。万方数据