葡西地区油水层分类解释方法

葡西地区葡萄花油层投入开发以来,由于薄差层,低阻油层,高阻水层并存,储集层岩性,孔隙结构复杂多变,致使开发井解释符合率太低,远不能适应油田高效开发要求,本文通过大庆长垣以西葡西地区储层地质特征及储层“四性”关系分析,给出一种按岩性分类解释方法,突出“四性”关系以达到提高符合率目的。葡萄花油层单砂体按着岩性特征划分为干层,粉砂,细粉砂,含钙致密砂及泥质粉砂岩层,在此基础上,分析了该地区不同类型储层电性与含油性关系,继而利用17口开发首钻井试油资料建立了储层分类解释图版,符合率达84．9％,经9口开发井33层试油验证,符合率达78．8％,对该油田高效开发及其它地区解释标准研究具有指导意义。

The Study on the Interpretation Chart for Oil and Water Zone Classification in Puxi Area

Since Putaohua oil reservoir in Puxi area was developed, the interpretation coincidence rate of development wells has been poor and does not fit the requirement of developing the oilfield high efficiently because of poor thin bed,low resistivity oil zones,high resistivity water zones,complicated and variable lithology and pore structure. By analyzing the geological property and "four properties" relationship of the reservoir in Puxi area to the west of Alongated Bulge Anticlinal Belt of Daqing Oilfield, the paper classifies the mono sandbody of Putaohua oil reservoir into five kinds: dry sand,siltstone,fine siltstone, tight calcium snadstone and shaly siltstone according to physical properties. On the basis of this, the paper analyzes the relationship between electrical property and oil property of different reservoir in the area, and establishes the interpretation chart for reservoir classification through the well testing data of 17 first drilling wells. The coincidence rate is 84 9%. The result is verified by 33 zones of 11 wells testing and the coincidence rate is 78 8%. This has instructive meaning for high effective development of the Oilfield and interpretation criterion study of other regions.