裂缝性储层缝网压裂技术研究及应用
第32卷第6期2010年11月
石 油 钻 采 工 艺
OIL DRILLING & PRODUCTION TECHNOLOGY
Vol. 32 No. 6
Nov. 2010
文章编号：1000 – 7393（2010 ）06 – 0067 – 05
裂缝性储层缝网压裂技术研究及应用
陈守雨1 刘建伟2 龚万兴2 潘竟军3 何 骁4 修书志5
（1.东方宝麟科技发展（北京）有限公司，北京 100083；2.吐哈油田公司工程技术研究院，新疆哈密 839000；3.新疆油田公司采油工艺研究院，新疆克拉玛依 834000；4.西南油气田公司，四川成都 610017；5.华北油田公司采油工艺研究院，河北任丘 062552）
摘要：裂缝性储层压裂井生产能力主要受主裂缝沟通的天然裂缝系统控制区域的大小影响。裂缝性储层压裂改造后，短期产量来自高导流能力的主裂缝，长期产量则主要来自天然裂缝网络。常规压裂以抑制天然裂缝扩展形成主裂缝为主，其控制的渗流区域较为有限,这与压裂增产形成矛盾。因此，要提高压裂井改造效果，需要保证压裂形成的裂缝形态为网络裂缝，沟通更大的渗流区域和更远的裂缝作用距离，充分发挥主裂缝和天然裂缝网络的增产优势。在研究水力压裂裂缝网络形成条件的基础上，对缝网压裂的关键参数进行了分析研究。现场应用结果表明，缝网压裂的增产效果远远高于常规压裂。
关键词：裂缝性储层；缝网压裂；网络裂缝；G函数；叠加导数
中图分类号：TE357.1 文献标识码：A
Study and application on network fracturing technology in fractured reservoir
CHEN Shouyu1, LIU Jianwei2, GONG Wanxing2, PAN Jingjun3, HE Xiao4, XIU Shuzhi5
(1.Eastern Precise Kylin Technology Development Co.Ltd, Beijing 10083 China;
2. Research & Development Center of Tuha Oil?eld Company, Hami 839000, China;
3. Research Institute of Oil Production Technology of Xinjiang Oil?eld Company, Karamay 834000, China;
4. Southwest Oil and Gas ?eld Branch, Chengdu 621700, China;
5. Research Institute of Oil Production Technology, Huabei Oil?eld Company, Renqiu 062552, China)
Abstract: The productivity of fractured well in fractured reservoir was affected mainly by the controlling area of natural fracture system communicated by dominant fracture. Short-term output of fractured reservoir came from dominant fracture with high conductiv-ity after fracturing while the long-term production decided by the natural network fractures. Major principle of conventional fracturing was to get dominant fracture by restrain natural fractures; witch limited the sespage area of fluid and contrasted to the fracturing stimu-lation. In order to improve the effect of fractured well, complex network fractures were need after treatment to communicate bigger flow domain and reach to longer distance fracture, then both advantage of dominant fracture and natural fracture network were utilized. Besides the Network fracture forming conditions for hydraulic fracturing, the key parameters of network fracturing were analyzed in this paper. Field application shows that the yield-increased effect of network fracturing better than that of conventional treatment.
Key words: fractured reservoir; network fracturing; network fractures; G function; superimposed derivative
对于天然裂缝发育的裂缝性储层，水力压裂时，由于天然裂缝的抗张强度小于岩石的抗张强度，在一定净压力条件下，天然裂缝会优先开启并相互连通，引起压裂液大量滤失，导致主裂缝形成困难。这类储层天然裂缝系统大都成组出现，常是多组裂缝同时存在，每条裂缝都被其他裂缝包围，有时还被其他组裂缝切割，在其附近还可能分布更低级的裂缝。为保证主裂缝的形成，大多采用粉砂/陶段塞来降低压裂液滤失，控制天然裂缝延伸，但粉砂/陶段塞易导致砂堵，且对天然裂缝有一定伤害。也有使用高黏度胶塞和树脂颗粒来处理近井多裂缝形成主裂缝施工成功的案例。这些方法都是以抑制天然裂缝扩
作者简介： 陈守雨，1974年生。主要从事油田储层改造技术研究及现场应用工作，博士，工程师。E-mai l：na t han256@https://www.wendangku.net/doc/0a5581776.html,。