Evaluation model of two-stage gravel packing sand control well based on additional pressure drop

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Qi, Minhui^1 ; Li, Mingzhong^1 ; Li, Tong^2 ; Liang, Jun^3 ; Liu, Chunting^1 ; Ma, Junjie^1

School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong

266580, China^1

Third Oil Production Plant, PetroChina Huabei Oilfield Company, Cangzhou, Hebei

062450, China^2

Exploration and Development Research Institute, PetroChina Huabei Oilfield Company, Cangzhou, Hebei

062500, China^3

关键词: Additional pressure drops;    Construction parameter;    Evaluation modeling;    Fluid-solid coupling;    Gravel packing wells;    Pressure differences;    Sand control technology;    Unconsolidated sandstone reservoirs;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/2/022061/pdf
DOI  :  10.1088/1755-1315/300/2/022061

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Two-stage gravel pack sand control technology solves the problem of silt sand blockage in traditional high-pressure gravel pack, effectively improves the effective period and flow conductivity of the gravel pack. This technique has been widely used in the development of unconsolidated sandstone reservoirs, but the related studies still remain insufficient. In this paper, a sand control evaluation model based on additional pressure of the gravel packed layer is proposed for two-stage gravel packing sand control wells. Firstly, the complex mechanisms of sand plugging in gravel pack is divided into two types, horizontal and vertical, and the calculation model of dynamic permeability of the gravel pack is established. The finite element model of two-stage gravel packing sand control wells based on fluid-solid coupling is established by multi-physical coupling software COMSOL. The additional pressure drop of the sand control wells under various construction parameters is evaluated. Applying this method to evaluate a two-stage gravel packing well in Shengli Oilfield, it is concluded that after 200 days of production, the gravel pack's additional pressure drop of the traditional packing increases to 2.5 MPa, while the overall additional pressure difference of two-stage gravel packing is stable at about 1.3 MPa. It is proved that two-stage gravel packing sand control technology can effectively reduce the additional pressure drop and improve the productivity of oil well after completion.