渤海B油田水驱储层孔喉尺寸变化分析及应用

Analysis and Application of Reservoir Pore Throat Size Change After Water Flooding in B Oilfield of Bohai

王晓超 王锦林 魏俊 石端胜 乔峰

WANG Xiaochao WANG Jinlin WEI Jun SHI Duansheng QIAO Feng

中海油能源发展股份有限公司工程技术分公司, 天津 300452

CNOOC EnerTech-Drilling & Production Co., Tianjin 300452, China

油田经过长期注水开发必然导致储层孔喉特征发生变化，而孔喉尺寸的计算是调剖调驱体系封堵水流优势通道的关键。此文基于Carman-Kozeny公式，结合数值模拟建立了一种储层孔喉尺寸分析方法：利用数值模拟手段拟合油田生产状况，得到目前条件下井间渗透率，运用Carman-Kozeny公式计算得出目前条件下孔喉尺寸。该方法计算渤海B油田孔喉尺寸变化结果，与经验认识及现场示踪剂解释结果基本一致，与其他传统方法相比，具有便捷、价廉的优势。计算结果可为后续调剖、调驱等措施方案设计及体系粒径选择提供指导，促进现场应用。

Long-term water flooding will inevitably lead to the change of the pore throat characteristics. And the calculation of the pore throat size is the key to blocking water flow preferential passage by profile control and flooding system. Based on the CarmanKozeny formula, together with the numerical simulation, a method of calculating the reservoir pore throat size was established. The numerical simulation was used to match the oilfield production, calculate the present interwell permeability. The results calculated show that the change of pore size in the B oilfield is basically the same as the estimated by experience and tracer test. Compared with other traditional methods, it is convenient and inexpensive. The calculation results can provide guidance for the subsequent profile control design and system size selection, promotes the field application.

十三五国家科技重大专项“渤海油田化学驱配套工艺、方案优化及现场示范”（2016ZX05058-003-001）。

https://doi.org/10.3969/j.issn.1008-2336.2018.03.031