海上油田水力冲击压裂酸化技术研究与试验  

Research and Experiment of Hydraulic Impact Fracturing Acidification Technology in Offshore Oil Field

作　　者：孙林 杨万有 黄波 李旭光 熊培祺 Sun Lin;Yang Wanyou;Huang Bo;Li Xuguang;Xiong Peiqi(Engineering Technology Company of CNOOC Energy Technology&Services Limited)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津市300453

出　　处：《石油机械》2021年第6期36-42,共7页China Petroleum Machinery

基　　金：国家科技重大专项“大型油气田及煤层气开发”(2016ZX05058);中国海洋石油集团有限公司重大项目“南海东部油田上产2000万t关键技术研究”之课题5“深层古近系油藏高效开发技术研究”(CNOOC-KJ 135ZDXM 37 SZ);中海油能源发展股份有限公司项目“海上油田脉冲水力冲击压裂酸化联作技术研究与应用”(HFKJ-GJ201904)。

摘　　要：为解决海上油田增产技术措施单一的问题,进行了水力冲击压裂与酸化联作技术研究与试验。基于可压缩形式的纳维-斯托克斯方程和连续性方程建立了水力冲击压裂压力波模型,编制了高精度模拟软件,优化设计了海上油田?244.5及?177.8 mm套管井的耐酸联作工具,并对冲击片和冲击室等部件进行改进,从而提高工具的稳定性、安全性以及耐酸性能;进行了套管及作业管柱的安全校核,并给定了适合的峰值压力控制范围;研发的强溶蚀酸液体系的现场岩屑溶蚀率可达42.07%~43.13%,动态驱替试验的渗透率为驱替前的1.57~1.76倍。开展的技术验证试验结果验证了技术破岩效果、软件模拟精度以及酸液的优良性能。研究成果可以进一步强化该技术在海上油田的改造效果,并提高技术模拟的精度和安全性,对类似油田的开发具有一定的借鉴意义。To address the problem of few stimulations for offshore oilfields,research and experiments on combined hydraulic impact fracturing and acidification technology are carried out.Based on the compressible Navier-Stokes equations and continuity equations,a hydraulic impact fracturing pressure wave model is established.A high-precision simulation software is compiled.The acid-resistant joint tool for use in 244.5 and 177.8 mm casing holes in the offshore oil field is optimized.The impact plate and the impact chamber are optimized to improve the stability,safety and acid resistance of the tool.The safety checks of the casing and the operating string are carried out,and the suitable peak pressure control range is given.The on-site cuttings dissolution rate by the developed strong dissolution acid liquid system can reach 42.07%~43.13%.The permeability in the dynamic displacement test was 1.57~1.76 times that before the displacement.The technical verification experiment carried out verified the rock breaking performance,the software simulation accuracy,and the performance of the acid.The research results can further strengthen the stimulation performance of technology in offshore oilfields,and improve the accuracy and safety of technical simulation,which has certain reference significance for the development of similar oilfields.

关 键 词：水力冲击 压裂 酸化 数值模拟 验证试验 海上油田 

分 类 号：TE357[石油与天然气工程—油气田开发工程]