裂缝对二氧化碳驱注气影响规律研究

发布时间：2018-08-01 08:24

【摘要】：为完善海拉尔油田贝14区块裂缝分布对二氧化碳驱注气规律影响理论研究,合理高效的实施二氧化碳注气开发。对海拉尔贝14区块天然和人工裂缝预测,气窜井气窜原因进行了细致研究。为获取海拉尔贝14区块岩石的弹性模量、泊松比、内聚力等岩石力学参数,对该区块岩石进行了单轴和三轴应力试验。进行了地应力大小和方向的测量试验,得到了贝14区块储层物性参数。结合二氧化碳驱油过程中多场耦合数学模型及三维地震资料和实钻资料,对贝14区块运用有限元模拟方法进行仿真分析,利用程序反演并构造了贝14区块的三维地质模型。运用三维的应力场数值模拟清楚地解释了不同层位之间的相互影响、不同地层的厚度变化和岩层产状变化。相应的三维模拟结果给出了层顶面和底面在平面上的最大、最小主应力分布图,得到了该区域垂向剖面的应力变化情况,并利用该三维空间应力场分布模型对区块中的构造裂缝分布进行了定量预测。通过破裂准则预测了贝14区块天然裂缝发育情况,并通过地应力场分布预测了人工裂缝展布特征。通过对贝14-X56-54井气窜原因和层位的分析,得到了裂缝对注气的影响规律,为海拉尔贝14区域提高产量提供了较为有效的理论依据。
[Abstract]:In order to improve the theoretical study on the influence of fracture distribution in Bei 14 block of Hailaer Oilfield on the gas injection law of carbon dioxide flooding, the development of carbon dioxide injection is carried out reasonably and efficiently. The prediction of natural and artificial fractures and the causes of gas channeling in Hailaer Bay 14 block are studied in detail. In order to obtain the rock mechanical parameters such as elastic modulus, Poisson's ratio and cohesion, uniaxial and triaxial stress tests were carried out. The physical parameters of the reservoir in Block Bei 14 are obtained by measuring the magnitude and direction of in-situ stress. Combined with multi-field coupling mathematical model, 3D seismic data and real drilling data during carbon dioxide flooding, the finite element simulation method is used to simulate and analyze Bei 14 block, and the 3D geological model of Bei 14 block is constructed by program inversion. Three dimensional numerical simulation of stress field is used to explain clearly the interaction between different layers, the thickness change of different strata and the variation of rock formation occurrence. The corresponding 3D simulation results show the maximum and minimum principal stress distribution of the top and bottom plane, and obtain the stress variation of the vertical section in this area. The 3D spatial stress field distribution model is used to quantitatively predict the distribution of structural fractures in blocks. The development of natural fractures in Block Bei 14 is predicted by fracture criterion, and the distribution of artificial fractures is predicted by the distribution of in-situ stress field. Based on the analysis of gas channeling in Bei 14-X56-54 well, the effect of fracture on gas injection is obtained, which provides an effective theoretical basis for increasing production in Hailaer Bay 14 area.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.7

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