摘要
吉木萨尔凹陷致密油藏储量巨大,但储集层孔渗性差,其单井产量低、生产周期长、开发成本高,系统地研究储集层岩石物理力学和地应力特征,对致密油藏的勘探开发有着重要意义。为了认识致密油藏储集层的岩石力学特征,建立储集层岩石力学参数测井评价模型,优化工程技术措施,选取吉A井和吉B井全直径岩心,在围压分别为0.689 5 MPa,11.032 0 MPa,22.064 0 MPa下进行声波测试和三轴抗压测试。结果表明,纵波和横波速度、动静态杨氏模量相互关系显著,三轴抗压强度随围压增大近似线性增大,围压对样品的破坏形态具有显著影响。
Tight oil reservoir in Jimusaer sag of Junggar basin is characterized by huge reserves, poor porosity and permeability, low single-well production, long production cycle, and high development cost. Systematic study of its petrophysical mechanics and ground stress char-acteristics have become the key of the tight oil reservoir exploration and development. For this reason, this paper developed the loggingevaluation model of the petrophysical mechanics parameters, optimized the measures of engineering technology, selected whole diametercores of Ji-A and Ji-B wells, and conducted acoustic wave and triaxial compression experiments under three confining pressures of 0.689 5MPa, 11.032 0 MPa and 22.064 0 MPa. The results show that there exists obvious correlation between longitudinal-shear wave velocity anddynamic-static Young＇s modulus; the triaxial compression strength is linearly increasing with the confining pressure increase, and the con-finning pressure has a significant effect on compressive failure of specimen.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2016年第2期158-162,共5页
Xinjiang Petroleum Geology
基金
国家973项目(2015CB250906)
