青海油田某区块深层岩石可压性分析  

Compressive analysis of deep rock in a block of Qinghai Oilfield

作　　者：范超强 齐宏 刘家魁 田勇 孙宏泰 缪玉松 FAN Chaoqiang;QI Hong;LIU Jiakui;TIAN Yong;SUN Hongtai;MIAO Yusong(School of Science,Qingdao University of Technology,Qingdao 266525,China;CCCC(Qingdao)Urban Construction Co.Ltd.,Qingdao 266300,China)

机构地区：[1]青岛理工大学理学院,青岛266525 [2]中交(青岛)城市建设有限公司,青岛266300

出　　处：《青岛理工大学学报》2024年第5期43-51,共9页Journal of Qingdao University of Technology

基　　金：山东省自然科学基金资助项目(ZR2020QE288);教育部产学合作协同育人项目(220803009261616);大学生创新创业项目(X202300627)。

摘　　要：油田地层的可压性评价是油田水力压裂施工中重点关注的问题,它直接关系到最终的增产效果。对青海油田某区块的深层岩石开展可压性评价,通过定义裂缝描述指数,结合岩石力学参数和残余应力两种方法计算的脆性指数,给出了脆性指标的表征算法;利用塑性应变能定义了一种塑性指数计算方法,结合岩石力学参数表示的塑性指数,给出了塑性指标的表征算法;在脆性指标和塑性指标相互验证的前提下,基于这两种影响因素,得到了可压性指数的计算公式,利用7组试验岩芯的可压性结果对油田目标区块的水力压裂施工给出了指导性建议。Compressibility evaluation of oilfield formation is the key problem in hydraulic fracturing and is directly related to the final production increase.In this paper,the compressibility evaluation on the deep rock in one block of Qinghai Oilfield was carried out.Brittleness index was characterizated quantitatively through defining the crack description index and combining it with two calculation methods of rock mechanics parameters and residual stress.Plasticity index was also characterizated quantitatively through two calculation methods of plastic strain energy and rock mechanics parameters.Based on the above two factors,calculation formula of compressibility index was obtained in the premise of mutual verification with brittleness index and plasticity index,and the calculation results of 7 groups of test cores were used to put forward some suggestions to the hydraulic fracturing of target oilfield block.

关 键 词：油气田开发 脆性指标 塑性指标 岩石可压性 

分 类 号：TE327[石油与天然气工程—油气田开发工程]