花庄油田花17断块储层微观孔隙结构评价

Evaluation of the micro-pore structure of Hua17 fault-block reservoir in Huazhuang oilfield

喉道分布是决定储层渗流性质的主要因素,如果储层渗透率主要由较大的喉道所贡献,那么流体的渗流通道大,渗流阻力小,渗流能力强,储层的开发潜力大。反之,如果储层渗透率主要由细小的喉道所贡献,那么流体的渗流阻力就大,渗流能力弱,储层的开发难度加大。利用恒速压汞技术对花庄油田花17断块储层微观孔隙特征进行了研究,结果表明:花17断块主流喉道半径基本小于2μm,属细微喉道,较难动用,油井自然产能低,储层为三类储层,开发难度大。

Throat distribution can have a great impact on reservoir transfusion ability.The reservoir whose permeability is mainly contributed by bigger radius throat,has bigger fluid transfusion enterclose,smaller transfusion resistance force,stronger transfusion ability and more development potential than the reservoir whose permeability is mainly contributed by smaller radius throat.By us ing the rate-controlled mercury injection method,this paper made a research on the characteristics of the micro-pore structure of Hua17 fault-block reservoir in Huazhuang oilfield.The results showed that the main throat radius of the reservoir was less than 2 μm and belonged to micro-thin throat,so they were difficult to be employed.Considering the low natural capacity of oil wells,the reservoir was categorized to the third kind which meant great difficulty in development.