Z89区块全缝长压裂模拟及储层改造研究

Research on Full Length Fracture Simulation and Reservoir Reforming in Block Z89

随着中国陆相油田进入开发中后期,开发难度逐渐攀升,如含水率过高、采收率下降等问题愈发严重。进一步对剩余油进行开发是油藏提高产能的关键问题,解决问题的关键措施包括开发单元的精细化剖分、分层注采及酸化、封堵、压裂等储层改造措施。基于井间力学参数模型,对压裂人工裂缝的三维全缝长进行数值模拟,并对裂缝与井网匹配、人工裂缝三维空间形态进行优化研究,建立更加有效的驱动体系,最大限度地扩大有效波及体积。在数值模拟基础上,将井网、砂体、人工裂缝、油水井关系统一考虑,不同类型储层采取不同规模的改造方式达到开发效果最优的储层改造技术,实现低渗透储层的有效开发。

As China’s continental oil fields enter the mid to late stages of development,the difficulty of development gradually increases,such as high water content and declining recovery rate.Further developing the remaining oil is a key issue in improving the production capacity of oil reservoirs,and the key measures to solve the problem include refined dissection of development units,layered injection and production,acidification,sealing,fracturing and other reservoir transformation measures.Based on the mechanical parameter model between wells,numerical simulation is conducted on the three-dimensional full fracture length of artificial fractures during fracturing,and optimization research is conducted on the matching between fractures and well network,as well as the three-dimensional spatial morphology of artificial fractures.A more effective driving system is established to maximize the effective swept volume.On the basis of numerical simulation,the well pattern,sand body,artificial fractures,and oil-water well relationship are considered uniformly.Different types of reservoirs are transformed in different scales to achieve the optimal development effect of reservoir transformation technology,achieving effective development of low permeability reservoirs.