渤中25-1油田明下段储层敏感性特征及影响因素

The sensitivity of reservoir characteristics and influence factors of BZ 25-1 oilfield the lower part of Minghuazhen formation

渤中25-1油田浅层主力油层分布在上第三系明下段,油层埋藏深度在1 650～1 750 m之间,孔隙度平均值为31.7%,渗透率平均值为2 382 mD。对于这样埋藏浅、高孔、高渗的油层,应该对其进行更好的保护与研究。从油层保护的角度出发,应用黏土矿物敏感性实验分析、岩矿鉴定、常规物性等实验资料,对该油田6口井明下段油层上千块次样品的岩石微观特征进行深入分析,并对典型样品进行了水敏性和速敏性流动实验,揭示出该油田储层的微观特征和敏感性规律,为该油田的开发提出合理的、准确的、科学的依据。

BZ 25-1oilfield shallow reservoirs distribution in the third system Minghuazhen formation under, reservoir burying depth is between 1 650 ~ 1 750 meters, porosity and permeability of a mean value of 31.7%, an average of 2382 roD, for such shallow buried depth, high porosity, high permeability, should the better protection and research. This article from the perspective of reservoir protection, application of clay mineral sensitivity experiment analysis, rock and mineral identifi- cation, regular physical experimental data of the oilfield, six wells Minghuazhen formation of thousands of pieces of sample rock microscopic features in-depth and meticulous analysis, and the typical samples were water sensitivity, speed sensitivity flow test. In order to reveal the reservoir microscopic characteristic and sensitivity of law, for the oil field development put forward reasonable, accurate, scientific basis.