JZS油田裂缝性潜山油藏基质驱油效率研究

发布时间：2018-11-24 20:08

【摘要】：为研究裂缝性潜山油藏基质与裂缝的出油过程,定量基质驱油效率,以JZS油田裂缝性潜山油藏为原型,建立单裂缝模型,研究基质的驱油效率,绘制基质驱油效率图版。驱油动力研究表明,当基质渗透率小于3×10~(-3)μm~2时,基质驱油主要动力为渗吸作用,其次为驱替作用,当基质渗透率大于3×10~(-3)μm~2时,基质驱油主要动力为驱替作用,其次为渗吸作用。驱油效率研究表明,基质驱油效率随地层原油黏度增加急剧降低,以JZS油田物性特征为例,当基质物性为1×10~(-3)μm~2时,地层原油黏度由3mPa·s增至200mPa·s,基质驱油效率由12.5%降至3.2%。JZS油田裂缝性潜山油藏基质驱油效率为12.5%,其中渗吸作用贡献10.1%,驱替作用贡献2.4%。研究成果对裂缝性潜山油藏制订开发策略具有指导意义,同时驱油效率图版可为该类油藏标定采收率提供依据。
[Abstract]:In order to study the production process of matrix and fracture in fractured buried hill reservoir, quantitative matrix flooding efficiency was studied. Taking fractured buried hill reservoir in JZS oilfield as the prototype, a single fracture model was established to study the oil displacement efficiency of matrix and draw the matrix displacement efficiency chart. The study of flooding dynamics shows that when the matrix permeability is less than 3 脳 10 ~ (-3) 渭 m ~ 2, the main driving force of matrix flooding is permeation, followed by displacement, and when the matrix permeability is more than 3 脳 10 ~ (-3) 渭 m ~ 2, the main driving force of matrix flooding is displacement. The second is osmotic absorption. The study of oil displacement efficiency shows that the viscosity of crude oil increases and decreases sharply. Taking the physical properties of JZS oilfield as an example, when the physical property of matrix is 1 脳 10 ~ (-3) 渭 m ~ 2, the viscosity of formation crude oil increases from 3mPa s to 200mPa s, and the oil viscosity increases from 1 脳 10 ~ (-3) 渭 m ~ 2 to 1 脳 10 ~ (-3) 渭 m ~ 2. The efficiency of matrix flooding is reduced from 12.5% to 12.5% in fractured buried hill reservoirs in 3.2%.JZS oilfield, in which permeability and displacement contribute 10.1 and 2.4 respectively. The research results are of guiding significance for the development strategy of fractured buried hill reservoir and the oil displacement efficiency chart can provide the basis for the calibration of oil recovery in this kind of reservoir.
【作者单位】：中海石油(中国)有限公司天津分公司;
【基金】：国家科技重大专项“海上油田化学驱合理井网井距及剩余油定量描述技术研究”(2016ZX05058-001-007)
【分类号】：TE357

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