摘要
在三角洲前缘沉积背景下形成的砂泥岩薄互层,决定了英台-大安地区葡萄花油层具有发育大面积错叠分布岩性油藏的地质条件。本区岩性油藏具有砂体规模小、储层物性差、非均质性强、油水分布复杂、地层水矿化度较高等特征。寻找储层物性好的含油砂体已经成为制约该区评价工作瓶颈问题。在精细地质研究的基础上,选择了反应岩性油藏特征的有效厚度、试油产量、碳酸盐胶结物含量、渗透率、变异系数等参数,运用最大值标准化法对储层进行综合分类评价,优选Ⅰ、Ⅱ类区块作为评价工作的重点。
The geological condition of large area lithology reservoir in Yingtai - Da＇an area is decided by the thin sand - shale interbeds formed under the background of the delta front sedimentary. The lithology reservoir has characteristics of small sand scale, poor physical property, obvious heterogeneity, complex oil and water distribution and high formation water salinity. Looking for oil - bearing sand bodies became a bottleneck problem of restricting the evaluation work in this area. On the basis of the fine geologic research, some parameter reflecting lithologic reservoir characteristics were chose which in- clude effective thickness, test oil yield, content of carbonate cement, permeability and coefficient of variation, and the maxi- mum standardization method is applied to optimize Ⅰ and Ⅱ classes of block as the focus of evaluation work.
出处
《复杂油气藏》
2012年第4期38-42,共5页
Complex Hydrocarbon Reservoirs
关键词
英台-大安地区
葡萄花油层岩性油藏评价区块优选
Yingtai - Da＇ an area
Putaohua oil layer
lithology reservoir
optimization of evaluation block
